| Altamimi Z, Collilieux X and Métivier L (2011), "ITRF2008: An improved solution of the international terrestrial reference frame", Journal of Geodesy., feb, 2011. Vol. 85(8), pp. 457-473. Springer Science $mathplus Business Media. |
| Abstract: ITRF2008 is a refined version of the International Terrestrial Reference Frame based on reprocessed solutions of the four space geodetic techniques: VLBI, SLR, GPS and DORIS, spanning 29, 26, 12.5 and 16 years of observations, respectively. The input data used in its elaboration are time series (weekly from satellite techniques and 24-h session-wise from VLBI) of station positions and daily Earth Orientation Parameters (EOPs). The ITRF2008 origin is defined in such a way that it has zero translations and translation rates with respect to the mean Earth center of mass, averaged by the SLR time series. Its scale is defined by nullifying the scale factor and its rate with respect to the mean of VLBI and SLR long-term solutions as obtained by stacking their respective time series. The scale agreement between these two technique solutions is estimated to be 1.05 ± 0.13 ppb at epoch 2005.0 and 0.049 ± 0.010 ppb/yr. The ITRF2008 orientation (at epoch 2005.0) and its rate are aligned to the ITRF2005 using 179 stations of high geodetic quality. An estimate of the origin components from ITRF2008 to ITRF2005 (both origins are defined by SLR) indicates differences at epoch 2005.0, namely: −0.5, −0.9 and −4.7 mm along X , Y and Z -axis, respectively. The translation rate differences between the two frames are zero for Y and Z , while we observe an X -translation rate of 0.3 mm/yr. The estimated formal errors of these parameters are 0.2 mm and 0.2 mm/yr, respectively. The high level of origin agreement between ITRF2008 and ITRF2005 is an indication of an imprecise ITRF2000 origin that exhibits a Z -translation drift of 1.8 mm/yr with respect to ITRF2005. An evaluation of the ITRF2008 origin accuracy based on the level of its agreement with ITRF2005 is believed to be at the level of 1 cm over the time-span of the SLR observations. Considering the level of scale consistency between VLBI and SLR, the ITRF2008 scale accuracy is evaluated to be at the level of 1.2 ppb (8 mm at the equator) over the common time-span of the observations of both techniques. Although the performance of the ITRF2008 is demonstrated to be higher than ITRF2005, future ITRF improvement resides in improving the consistency between local ties in co-location sites and space geodesy estimates. |
BibTeX:
@article{Altamimi_2011,
author = {Altamimi, Zuheir and Collilieux, Xavier and Métivier, Laurent},
title = {ITRF2008: An improved solution of the international terrestrial reference frame},
journal = {Journal of Geodesy},
publisher = {Springer Science $mathplus Business Media},
year = {2011},
volume = {85},
number = {8},
pages = {457--473},
url = {http://dx.doi.org/10.1007/s00190-011-0444-4},
doi = {10.1007/s00190-011-0444-4}
}
|
| Amalvict M, Hinderer J and Rózsa S (2006), "Crustal vertical motion along a profile crossing the Rhine graben from the Vosges to the Black Forest Mountains: Results from absolute gravity, GPS and levelling observations", Journal of Geodynamics., jan, 2006. Vol. 41(1-3), pp. 358-368. |
| Abstract: The Rhine plain is oriented north-south and limited by the Vosges Mountains (France) to the West and the Black Forest Mountains (Germany) to the East. The present-day tectonic evolution of this system is not well known and many questions are still pending: is the graben subsiding? Are the mountains uplifting? What is the relative behaviour of the three different geological components? In attempting to answer these questions, we compare for the first time in this region time series of absolute gravity (AG) measurements to the available GPS observations at three sites along a profile crossing the Rhine graben. Our reference station is the gravimetric observatory near Strasbourg (J9), located in the Rhine plain where AG measurements are performed regularly since 1997 and where superconducting gravimeter (SG) observations are available almost continuously for 17 years. The secondary sites are the Welschbruch station in the Vosges Mountains where six AG measurements have been conducted since 1997 and the Black Forest Observatory (BFO) where three AG measurements are available. GPS permanent receivers are collocated at the Strasbourg-J9 site since 1999, at the Welschbruch station since 2000, and at BFO since 2002. Levelling data are only available in the BFO region. We compare the long term content of two types of geodetic measurements with special emphasis on the trend despite the limited duration of our data sets. Assuming that the gravity changes are linear in time, we obtain g ̇ = 1.9 ± 0.2 $Gal/ yr at Strasbourg-J9, ġ = - 0.96 ± 0.2 $Gal/ yr at Welschbruch site and ġ = 2.5 ± 0.5 $Gal/yr at BFO. The trends according to GPS observations are, respectively: -1.51 ± 0.07 and -0.74 ± 0.10 mm/yr at Strasbourg-J9 and Welschbruch site, respectively; there is no GPS result available at BFO. The AG results for BFO are very questionable, as well as the GPS observations at the Welschbruch station. Nonetheless, Strasbourg-J9 and Welschbruch AG measurements lead to subsidence and uplift, respectively, which are expected results in agreement with GPS at Strasbourg-J9. © 2005 Elsevier Ltd. All rights reserved. |
BibTeX:
@article{2006JGeo...41..358A,
author = {Amalvict, M. and Hinderer, J. and Rózsa, S.},
title = {Crustal vertical motion along a profile crossing the Rhine graben from the Vosges to the Black Forest Mountains: Results from absolute gravity, GPS and levelling observations},
journal = {Journal of Geodynamics},
year = {2006},
volume = {41},
number = {1-3},
pages = {358--368},
doi = {10.1016/j.jog.2005.08.036}
}
|
| van Baelen J, Aubagnac J-P, Doerflinger E, Bock O, Walpersdorf A and Masson F (2003), "IHOP: the French GPS-water vapor contribution", In EGS - AGU - EUG Joint Assembly., apr, 2003.
[BibTeX] |
BibTeX:
@inproceedings{2003EAEJA....13704V,
author = {van Baelen, J and Aubagnac, J.-P. and Doerflinger, E and Bock, O and Walpersdorf, A and Masson, F},
title = {IHOP: the French GPS-water vapor contribution},
booktitle = {EGS - AGU - EUG Joint Assembly},
year = {2003}
}
|
| Baize S, Cushing EM, Lemeille F and Jomard H (2013), "Updated seismotectonic zoning scheme of Metropolitan France, with reference to geologic and seismotectonic data", Bulletin de la Societe Geologique de France., mar, 2013. Vol. 184(3), pp. 225-259. GeoScienceWorld. |
| Abstract: This work presents the seismotectonic zoning scheme of Metropolitan France developed by the IRSN (French Institute for Radioprotection and Nuclear Safety) within the framework of its seismic hazard assessment activities. It is the outcome of many years of work following the publication of the “seismotectonic atlas” in 1993 [Grellet et al., 1993].This scheme supports the assessment of seismic hazard by IRSN. It takes into account the most recent data concerning the deep and surface geology, as well as those related to seismotectonics and tectonic activity. It finally includes 67 surface seismotectonic zones (STZ), as well as a catalogue of 74 faults or structures (named hereafter “potential active faults”) for which indications of Neogene to Quaternary displacement can be inferred. The description of the zoning scheme comes along with an estimation of the uncertainty on the boundary location between adjacent STZ. We also qualitatively determine a “relevance order” for each limit, so as to illustrate their reliability to separate regions of different seismogenic potential. Also, we attributed to the faults an indication whose purpose is to reflect the recent character of their activity, and thus their seismotectonic potential.This assessment of uncertainties was undertaken to better integrate the zoning scheme in the general approach, which arises from recent studies, namely the propagation of the uncertainties in seismic hazard evaluation, whether deterministic or probabilistic. |
BibTeX:
@article{Baize_2013,
author = {Baize, Stéphane and Cushing, Edward Marc and Lemeille, Francis and Jomard, Hervé},
title = {Updated seismotectonic zoning scheme of Metropolitan France, with reference to geologic and seismotectonic data},
journal = {Bulletin de la Societe Geologique de France},
publisher = {GeoScienceWorld},
year = {2013},
volume = {184},
number = {3},
pages = {225--259},
url = {http://bsgf.geoscienceworld.org/content/184/3/225.abstract},
doi = {10.2113/gssgfbull.184.3.225}
}
|
| Biessy G, Moreau F, Dauteuil O and Bour O (2011), "Surface deformation of an intraplate area from GPS time series", Journal of Geodynamics., jul, 2011. Vol. 52(1), pp. 24-33. Elsevier BV. |
| Abstract: The aim of this study is to identify the processes that lead to the ground surface deformation above the fractured crystalline aquifer of Ploemeur (French Brittany). We conducted a four-year continuous GPS data survey in order to extract the hydrogeological contribution due to the variations of the hydraulic head of the confined aquifer. The GPS configuration used in this study, with a differential setup, short baselines and adapted processing parameters, may have removed tide effects, ocean tide loading and tectonics trends. We checked in particular the case of ocean tide loading because of its important contribution in Brittany. Time series calculated with GAMIT software indicate a seasonal deformation on both vertical direction (up to 16. mm of displacement) and horizontal plane (from 3 to 12. mm of displacement) that provide a 3D motion. This sub-annual deformation is induced by variations of the hydraulic head of the aquifer and depends on its 3D hydromechanical properties. However, an offset between ground uplift and piezometric rise could not be explained by pressure variations into the deep aquifer and was linked to the variations of the hydrous state of the ground. This GPS study highlights that the hydrogeological and hydrological processes act significantly on ground motion and should be integrated in any Earth deformation survey. ?? 2010 Elsevier Ltd. |
BibTeX:
@article{Biessy_2011,
author = {Biessy, G. and Moreau, F. and Dauteuil, O. and Bour, O.},
title = {Surface deformation of an intraplate area from GPS time series},
journal = {Journal of Geodynamics},
publisher = {Elsevier BV},
year = {2011},
volume = {52},
number = {1},
pages = {24--33},
url = {http://dx.doi.org/10.1016/j.jog.2010.11.005},
doi = {10.1016/j.jog.2010.11.005}
}
|
| Bock O, Bosser P, Pacione R, Nuret M, Fourri???? N and Parracho A (2016), "A high-quality reprocessed ground-based GPS dataset for atmospheric process studies, radiosonde and model evaluation, and reanalysis of HyMeX Special Observing Period", Quarterly Journal of the Royal Meteorological Society., nov, 2016. Vol. 142, pp. 56-71. Wiley-Blackwell. |
| Abstract: In the framework of the Hydrological cycle in the Mediterranean Experiment (HyMeX) project, measurements from more than 1000 ground-based Global Positioning System (GPS) receivers located in the northwestern Mediterranean area are reprocessed using a single piece of GPS software for the period from 1 September 2012 to 31 March 2013. A special screening procedure is developed for the removal of outliers in the GPS Zenith Total Delay (ZTD) data. ZTD data are converted to integrated water vapour (IWV) using surface pressure information from an AROME-WMED operational analysis. The reprocessed ZTD and IWV data are used to assess the accuracy of the near-real time E-GVAP ZTD data assimilated in operational numerical weather prediction systems and to validate the IWV data from the AROME-WMED operational analysis and AROME-WMED reanalysis 1, and from radiosonde observations. The mean differences between E-GVAP and reprocessed ZTD data are not negligible and lie in the range from -3 to +3 mm. The standard deviations of differences are between 4 and 8 mm. The comparisons of IWV from AROME-WMED analyses and the reprocessed GPS data show high quality of the analyses where operational GPS data are assimilated and lower quality where no GPS data are assimilated. Small but significant biases are found in the radiosonde data during daytime (-0.5 to +1.4 kg m(-2)), but their origin is not determined so far. Thanks to the high spatial density of the reprocessed GPS stations, both the large-scale and small-scale variations in IWV can be documented. The case of HyMeX Intensive Observing Period 8 is presented as an example of a heavy precipitation event. This work suggests that improved quality of the humidity fields can be expected of the future AROME-WMED reanalysis 2 as a result of the assimilation of the reprocessed GPS data. |
BibTeX:
@article{Bock_2015,
author = {Bock, O. and Bosser, P. and Pacione, R. and Nuret, M. and Fourri????, N. and Parracho, A.},
title = {A high-quality reprocessed ground-based GPS dataset for atmospheric process studies, radiosonde and model evaluation, and reanalysis of HyMeX Special Observing Period},
journal = {Quarterly Journal of the Royal Meteorological Society},
publisher = {Wiley-Blackwell},
year = {2016},
volume = {142},
pages = {56--71},
url = {http://dx.doi.org/10.1002/qj.2701},
doi = {10.1002/qj.2701}
}
|
| Bock O, Doerflinger E, Masson F, Walpersdorf A, Van-Baelen J, Tarniewicz J, Troller M, Somieski A, Geiger A and Bürki B (2004), "GPS water vapor project associated to the ESCOMPTE programme: Description and first results of the field experiment", Physics and Chemistry of the Earth. Vol. 29(2-3), pp. 149-157. |
| Abstract: A dense network of 17 dual frequency GPS receivers has been operated for two weeks during June 2001 within a 20 km × 20 km area around Marseille, France, as part of the ESCOMPTE field campaign ([Cros et al., 2004. The ESCOMPTE program: an overview. Atmos. Res. 69, 241-279]; http://medias.obs-mip.fr/escompte). The goal of this GPS experiment was to provide GPS data allowing for tomographic inversions and their validation within a well-documented observing period (the ESCOMPTE campaign). Simultaneous water vapor radiometer, solar spectrometer, Raman lidar and radiosonde data are used for comparison and validation. In this paper, we highlight the motivation, issues and describe the GPS field experiment. Some first results of integrated water vapor retrievals from GPS and the other sensing techniques are presented. The strategies for GPS data processing and tomographic inversions are discussed. © 2004 Elsevier Ltd. All rights reserved. |
BibTeX:
@article{2004PCE....29..149B,
author = {Bock, O. and Doerflinger, E. and Masson, F. and Walpersdorf, A. and Van-Baelen, J. and Tarniewicz, J. and Troller, M. and Somieski, A. and Geiger, A. and Bürki, B.},
title = {GPS water vapor project associated to the ESCOMPTE programme: Description and first results of the field experiment},
journal = {Physics and Chemistry of the Earth},
year = {2004},
volume = {29},
number = {2-3},
pages = {149--157},
doi = {10.1016/j.pce.2004.01.014}
}
|
| Boniface K, Champollion C, Chery J, Ducrocq V, Rocken C, Doerflinger E and Collard P (2012), "Potential of shipborne GPS atmospheric delay data for prediction of Mediterranean intense weather events", Atmospheric Science Letters., jun, 2012. Vol. 13(4), pp. 250-256. Wiley-Blackwell. |
BibTeX:
@article{Boniface_2012,
author = {Boniface, K. and Champollion, C. and Chery, J. and Ducrocq, V. and Rocken, C. and Doerflinger, E. and Collard, P.},
title = {Potential of shipborne GPS atmospheric delay data for prediction of Mediterranean intense weather events},
journal = {Atmospheric Science Letters},
publisher = {Wiley-Blackwell},
year = {2012},
volume = {13},
number = {4},
pages = {250--256},
url = {http://dx.doi.org/10.1002/asl.391},
doi = {10.1002/asl.391}
}
|
| Boniface K, Champollion Cé, Masson F and Ducrocq Vé (2010), "Characterisation of Mediterranean heavy rainfall events from GPS water vapour monitoring", In EGU General Assembly Conference Abstracts., may, 2010. Vol. 12, pp. 11626.
[BibTeX] |
BibTeX:
@inproceedings{2010EGUGA..1211626B,
author = {Boniface, Karen and Champollion, Cédric and Masson, Frédéric and Ducrocq, Véronique},
title = {Characterisation of Mediterranean heavy rainfall events from GPS water vapour monitoring},
booktitle = {EGU General Assembly Conference Abstracts},
year = {2010},
volume = {12},
pages = {11626}
}
|
| Boniface K, Ducrocq V, Jaubert G, Yan X, Brousseau P, Masson F, Champollion C, Chéry J and Doerflinger E (2009), "Impact of high-resolution data assimilation of GPS zenith delay on Mediterranean heavy rainfall forecasting", Annales Geophysicae., jul, 2009. Vol. 27(7), pp. 2739-2753. Copernicus GmbH. |
| Abstract: Impact of GPS (Global Positioning System) data assimilation is assessed here using a high-resolution numerical weather prediction system at 2.5 km horizontal resolution. The Zenithal Tropospheric Delay (ZTD) GPS data from mesoscale networks are assimilated with the 3DVAR AROME data assimilation scheme. Data from more than 280 stations over the model domain have been assimilated during 15-day long assimilation cycles prior each of the two studied events. The results of these assimilation cycles show that the assimilation of GPS ZTD with the AROME system performs well in producing analyses closer to the ZTD observations in average. Then the impacts of assimilating GPS data on the precipitation forecast have been evaluated. For the first case, only the AROME runs starting a few hours prior the triggering of the convective system are able to simulate the convective precipitation. The assimilation of GPS ZTD observations improves the simulation of the spatial extent of the precipitation, but slightly underestimates the heaviest precipitation in that case compared with the experiment without GPS. The accuracy of the precipitation forecast for the second case is much better. The analyses from the control assimilation cycle provide already a good description of the atmosphere state that cannot be further improved by the assimilation of GPS observations. Only for the latest day (22 November 2007), significant differences have been found between the two parallel cycles. In that case, the assimilation of GPS ZTD allows to improve the first 6 to 12 h of the precipitation forecast. |
BibTeX:
@article{Boniface_2009,
author = {Boniface, K. and Ducrocq, V. and Jaubert, G. and Yan, X. and Brousseau, P. and Masson, F. and Champollion, C. and Chéry, J. and Doerflinger, E.},
title = {Impact of high-resolution data assimilation of GPS zenith delay on Mediterranean heavy rainfall forecasting},
journal = {Annales Geophysicae},
publisher = {Copernicus GmbH},
year = {2009},
volume = {27},
number = {7},
pages = {2739--2753},
url = {http://dx.doi.org/10.5194/angeo-27-2739-2009},
doi = {10.5194/angeo-27-2739-2009}
}
|
| Boniface K, Walpersdorf A, Guyomarc'h G, Deliot Y, Karbou F, Vionnet V and Nievinski F (2015), "GNSS reflectometry measurement of snow depth and soil moisture in the French Alps", In 2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS). Vol. 1, pp. 5205-5207. Institute of Electrical & Electronics Engineers (IEEE). |
| Abstract: © 2015 IEEE.Over the last ten years Earth observing systems have grown considerably and thus allow the use of Global Navigation Satellite System (GNSS) signals for remote sensing. Several studies in the U.S. have proven the ability of existing GNSS ground networks to measure environmental parameters quantifying essential surface conditions for the understanding of the water cycle. This is possible by taking advantage of reflected signals around geodetic stations. Improved characterization of environmental disturbances in GNSS signals is also essential to increase the accuracy of future GNSS measurement for applications in Earth Sciences. GNSS reflectometry provides these surface parameters at an intermediate scale that can bridge the lack of data between in situ and satellite observations. Here we adapt and develop for the first time the GNSS reflectometry method using the existing sites of the French national GNSS permanent network (RENAG) for snow and soil moisture applications. |
BibTeX:
@inproceedings{Boniface_2015,
author = {Boniface, K and Walpersdorf, A and Guyomarc'h, G. and Deliot, Y and Karbou, F and Vionnet, V and Nievinski, F},
title = {GNSS reflectometry measurement of snow depth and soil moisture in the French Alps},
booktitle = {2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)},
publisher = {Institute of Electrical & Electronics Engineers (IEEE)},
year = {2015},
volume = {1},
pages = {5205--5207},
url = {http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=7327007},
doi = {10.1109/IGARSS.2015.7327007}
}
|
| Boudevillain B, Argence Sé, Claud C, Ducrocq Vé, Joly B, Joly A, Lambert D, Nuissier O, Plu M, Ricard D, Arbogast P, Berne A, Chaboureau J-P, Chapon B, Crepin F, Delrieu G, Doerflinger E, Funatsu B, Kirstetter P-E, Masson F, Maynard K, Richard E, Sanchez E, Terray L and Walpersdorf A (2009), "Projet Cyprim, partie I: Cyclogenèses et précipitations intenses en région méditerranéenne: origines et caractéristiques", La Météorologie. Vol. 66(66), pp. 18-28. INIST-CNRS. |
| Abstract: Le premier volet du projet Cyprim vise à mieux identifier les précurseurs des cyclogenèses et des précipitations intenses en région méditerranéenne. Cet article en présente les principaux résultats. Il est question des ingrédients météorologiques à l'origine de ces systèmes, de la grande à la mésoéchelle, des causes des fortes intensités, localisations et parfois stationnarité des récipitations associées. Le coeur de l'article présente des méthodes d'identification des anomalies de tourbillon potentiel liées à l'occurrence d'événements précipitants intenses et dresse une climatologie de ces anomalies. Les perspectives d'exploitation de cette information pour améliorer la qualité des prévisions sont évoquées. The first part of the CYPRIM project (Cyclogenesis and intense precipitations in the Mediterranean region) aims at a better identification of the precursor structures of cyclogenesis and heavy precipitation in the Mediterranean region. This article presents the main results. It mentions the meteorological ingredients from which these systems originate from the large to themesoscale, the reasons for large intensities, the localization and sometimes stationarity of the associated precipitations. The heart of the article shows methods for identifiying potential vorticity anomalies involved in the occurrence of heavy precipitation events and sets up a climatology of these anomalies.The perspectives of the usefulness of this information for improving forecast quality are discussed. |
BibTeX:
@article{Boudevillain_2009,
author = {Boudevillain, Brice and Argence, Sébastien and Claud, Chantal and Ducrocq, Véronique and Joly, Bruno and Joly, Alain and Lambert, Dominique and Nuissier, Olivier and Plu, Matthieu and Ricard, Didier and Arbogast, Philippe and Berne, Alexis and Chaboureau, Jean-Pierre and Chapon, Benot and Crepin, Fabien and Delrieu, Guy and Doerflinger, Erik and Funatsu, Beatriz and Kirstetter, Pierre-Emmanuel and Masson, Frederic and Maynard, Karine and Richard, Evelyne and Sanchez, Emilia and Terray, Laurent and Walpersdorf, Andrea},
title = {Projet Cyprim, partie I: Cyclogenèses et précipitations intenses en région méditerranéenne: origines et caractéristiques},
journal = {La Météorologie},
publisher = {INIST-CNRS},
year = {2009},
volume = {66},
number = {66},
pages = {18--28},
url = {http://documents.irevues.inist.fr/handle/2042/28828},
doi = {10.4267/2042/28828}
}
|
| Bouin MN and Wöppelmann G (2010), "Land motion estimates from GPS at tide gauges: A geophysical evaluation", Geophysical Journal International., jan, 2010. Vol. 180(1), pp. 193-209. Oxford University Press (OUP). |
| Abstract: Space geodesy applications have mainly been limited to horizontal deformations due to a number of restrictions on the vertical component accuracy. Monitoring vertical land motion is nonetheless of crucial interest in observations of long-term sea level change or postglacial rebound measurements. Here, we present a global vertical velocity field obtained with more than 200 permanent GPS stations, most of them colocated with tide gauges (TGs). We used a state of the art, homogeneous processing strategy to ensure that the reference frame was stable throughout the observation period of almost 10 yr. We associate realistic uncertainties to our vertical rates, taking into account the time-correlation noise in the time-series. The results are compared with two independent geophysical vertical velocity fields: (1) vertical velocity estimates using long-term TG records and (2) postglacial model predictions from the ICE-5G (VM2) adjustment. The quantitative agreement of the GPS vertical velocities with the ‘internal estimates’ of vertical displacements using the TG record is very good, with a mean difference of −0.13 ± 1.64 mm yr−1 on more than 100 sites. For 84 per cent of the GPS stations considered, the vertical velocity is confirmed by the TG estimate to within 2 mm yr−1. The overall agreement with the glacial isostatic adjustment (GIA) model is good, with discrepancy patterns related either to a local misfit of the model or to active tectonics. For 72 per cent of the sites considered, the predictions of the GIA model agree with the GPS results to within two standard deviations. Most of the GPS velocities showing discrepancies with respect to the predictions of the GIA model are, however, consistent with previously published space geodesy results. We, in turn, confirm the value of 1.8 ± 0.5 mm yr−1 for the 20th century average global sea level rise, and conclude that GPS is now a robust tool for vertical land motion monitoring which is accurate at least at 1 mm yr−1. |
BibTeX:
@article{Bouin_2010,
author = {Bouin, M. N. and Wöppelmann, G.},
title = {Land motion estimates from GPS at tide gauges: A geophysical evaluation},
journal = {Geophysical Journal International},
publisher = {Oxford University Press (OUP)},
year = {2010},
volume = {180},
number = {1},
pages = {193--209},
url = {http://dx.doi.org/10.1111/j.1365-246x.2009.04411.x},
doi = {10.1111/j.1365-246X.2009.04411.x}
}
|
| Brenot H, Ducrocq Vé, Walpersdorf A, Champollion Cé and Caumont O (2006), "GPS zenith delay sensitivity evaluated from high-resolution numerical weather prediction simulations of the 8-9 September 2002 flash flood over southeastern France", Journal of Geophysical Research Atmospheres., aug, 2006. Vol. 111(15), pp. D15105. |
| Abstract: Estimations of zenith total delays (ZTD) were obtained during postprocessing$nof a high-resolution (2.4 km) nonhydrostatic atmospheric model (Méso-NH).$nThese estimations were used to determine their sensitivity with respect$nto formulations of atmospheric refractivity, the approximation of$nzenith hydrostatic delays (ZHD) deduced from ground pressure, and$nthe contributions of hydrometeors. The factor $ for the conversion$nof zenith wet delay (ZWD) to integrated water vapor (IWV) was examined.$nMéso-NH is applied here to the extreme flash flood event of 8–9 September$n2002 in southeastern France. The use of the hydrostatic formulation$n(to infer ZHD) leads to an overestimation of up to 18 mm with respect$nto the vertical integration of refractivity. Delay contributions$nof hydrometeors simulated by the high-resolution model reached more$nthan 70 mm (≈11 kg/m2 IWV) in the heart of the convective cells in$nthe case of the extreme flood event. The mean variations of IWV due$nto the use of different conversion factors ($ used to transform ZWD$nto IWV) are evaluated to be less than 0.3 kg/m2. This is less than$nthe mean underestimation of IWV by 0.6 kg/m2 relative to the GPS-like$nevaluation of IWV using the hydrostatic formulation and the ground$ntemperature. In this study we also use GPS ZTD observations to validate$nthree different numerical simulations of this extreme flood event.$nThe simulation with the best fit to the GPS observations is also$nin best agreement with the surface rainfall measurements. |
BibTeX:
@article{2006JGRD..11115105B,
author = {Brenot, Hugues and Ducrocq, Véronique and Walpersdorf, Andrea and Champollion, Cédric and Caumont, Olivier},
title = {GPS zenith delay sensitivity evaluated from high-resolution numerical weather prediction simulations of the 8-9 September 2002 flash flood over southeastern France},
journal = {Journal of Geophysical Research Atmospheres},
year = {2006},
volume = {111},
number = {15},
pages = {D15105},
doi = {10.1029/2004JD005726}
}
|
| Bruyninx C, Altamimi Z, Becker M, Craymer M, Combrinck L, Combrink A, Dawson J, Dietrich R, Fernandes R, Govind R, Herring T, Kenyeres A, King R, Kreemer C, Lavallée D, Legrand J, Sánchez L, Sella G, Shen Z, Santamara-Gómez A and Wöppelmann G (2012), "A Dense Global Velocity Field Based on GNSS Observations: Preliminary Results", In International Association of Geodesy Symposia., jul, 2012. Vol. 136, pp. 19-26. Springer Science $mathplus Business Media. |
BibTeX:
@incollection{Bruyninx_2011,
author = {Bruyninx, C. and Altamimi, Z. and Becker, M. and Craymer, M. and Combrinck, L. and Combrink, A. and Dawson, J. and Dietrich, R. and Fernandes, R. and Govind, R. and Herring, T. and Kenyeres, A. and King, R. and Kreemer, C. and Lavallée, D. and Legrand, J. and Sánchez, L. and Sella, G. and Shen, Z. and Santamara-Gómez, A. and Wöppelmann, G.},
title = {A Dense Global Velocity Field Based on GNSS Observations: Preliminary Results},
booktitle = {International Association of Geodesy Symposia},
publisher = {Springer Science $mathplus Business Media},
year = {2012},
volume = {136},
pages = {19--26},
url = {http://dx.doi.org/10.1007/978-3-642-20338-13},
doi = {10.1007/978-3-642-20338-1{\_}3}
}
|
| Calais E, Nocquet JM, Jouanne F and Tardy M (2002), "Current strain regime in the Western Alps from continuous Global Positioning System measurements, 1996-2001", Geology. Vol. 30(7), pp. 651-654. Geological Society of America. |
| Abstract: Four to six years of continuous measurements at 10 permanent Global Positioning System sites in the Western Alps show horizontal residual velocities of <2 mm/yr with respect to stable Europe; uncertainties range from 0.3 to 1.4 mm/yr. These velocities and the associated strain-rate field indicate that the central part of the range is currently dominated by east-west extension, whereas the southern part shows north-south to northwest-southeast compression. The geodetic and seismotectonic data are consistent with a model where strain is essentially controlled by the counterclockwise rotation of the Adriatic microplate with respect to Eurasia. This rotation, together with the arcuate shape of the contact between the Adriatic microplate and the Alps, induces dextral shear kinematic boundary conditions across the Western Alps, with an additional divergence component in their central part and in Switzerland, and a convergence component in their southern part. |
BibTeX:
@article{Calais_2002,
author = {Calais, E. and Nocquet, J. M. and Jouanne, F. and Tardy, M.},
title = {Current strain regime in the Western Alps from continuous Global Positioning System measurements, 1996-2001},
journal = {Geology},
publisher = {Geological Society of America},
year = {2002},
volume = {30},
number = {7},
pages = {651--654},
url = {http://dx.doi.org/10.1130/0091-7613(2002)030<0651:csritw>2.0.co;2},
doi = {10.1130/0091-7613(2002)030<0651:CSRITW>2.0.CO;2}
}
|
| Champollion C, Flamant C, Bock O, Masson F, Turner DD and Weckwerth T (2009), "Mesoscale GPS tomography applied to the 12 June 2002 convective initiation event of IHOP2002", Quarterly Journal of the Royal Meteorological Society., apr, 2009. Vol. 135(640), pp. 645-662. Wiley-Blackwell. |
| Abstract: The time-varying three-dimensional water vapour field derived from mesoscale Global Positioning System (GPS) tomography data is used to describe the water vapour variability in relation to the dynamics of the atmo sphere during convective initiation (CI). The paper presents the theoretical framework of GPS tomography at the mesoscale, including aspects related to the assimilation of independent data (e.g. water vapour profiles issued from meteorological balloon soundings). GPS tomography-derived water vapour density retrievals are validated against lidar, the Atmospheric Emitted Radiance Interferometer and radiosonde data, even if the short three-day period of the study prevents conclusions about the real accuracy of the GPS tomography technique. GPS tomography products are used, in synergy with surface and sounding-derived meteorological variable measurements, satellite imagery and reflectivity composites from the WSR-88D network and S-POL radar, to study environmental conditions leading to the 12 June 2002 CI event during the International H(2)O Project. On this day, CI was triggered simultaneously, shortly after 2100 UTC, in two locations along an old Outflow boundary lying east-west in the vicinity of the Oklahoma-Kansas border. The study focuses on CI to the east, which was triggered at the intersection of the outflow boundary with a distinct southwest-northeast-oriented moisture convergence line. The latter formed as the result of a cross-dryline circulation leading to the penetration of dry air meeting with the moister air mass associated with the southerly low-level flow east of the dryline. These intersecting boundaries appeared to have provided the necessary triggering mechanism for getting moist surface air parcels up to the level of free convection. Tomography-derived water vapour fields provided observational evidence of the vertical transport of water vapour above the lifting condensation level and the level of free convection to the south of and along the intersecting boundaries. Copyright (C) 2009 Royal Meteorological Society |
BibTeX:
@article{Champollion_2009,
author = {Champollion, C. and Flamant, C. and Bock, O. and Masson, F. and Turner, D. D. and Weckwerth, T.},
title = {Mesoscale GPS tomography applied to the 12 June 2002 convective initiation event of IHOP2002},
journal = {Quarterly Journal of the Royal Meteorological Society},
publisher = {Wiley-Blackwell},
year = {2009},
volume = {135},
number = {640},
pages = {645--662},
url = {http://dx.doi.org/10.1002/qj.386},
doi = {10.1002/qj.386}
}
|
| Champollion C, Masson F, Bock O, Bouin M, Walpersdorf A, Doerflinger E, van Baelen J and Brenot H (2003), "GPS Water Vapor Tomography Based on Accurate Estimations of the GPS Tropospheric Parameters", AGU Fall Meeting Abstracts., dec, 2003.
[BibTeX] |
BibTeX:
@article{2003AGUFM.G51B0030C,
author = {Champollion, C and Masson, F and Bock, O and Bouin, M and Walpersdorf, A and Doerflinger, E and van Baelen, J and Brenot, H},
title = {GPS Water Vapor Tomography Based on Accurate Estimations of the GPS Tropospheric Parameters},
journal = {AGU Fall Meeting Abstracts},
year = {2003}
}
|
| Champollion C, Masson F, Bouin MN, Walpersdorf A, Doerflinger E, Bock O and Van Baelen J (2005), "GPS water vapour tomography: Preliminary results from the ESCOMPTE field experiment", In Atmospheric Research., mar, 2005. Vol. 74(1-4), pp. 253-274. |
| Abstract: Water vapour plays a major role in atmospheric processes but remains difficult to quantify due to its high variability in time and space and the sparse set of available measurements. The GPS has proved its capacity to measure the integrated water vapour at zenith with the same accuracy as other methods. Recent studies show that it is possible to quantify the integrated water vapour in the line of sight of the GPS satellite. These observations can be used to study the 3D heterogeneity of the troposphere using tomographic techniques. We develop three-dimensional tomographic software to model the three-dimensional distribution of the tropospheric water vapour from GPS data. First, the tomographic software is validated by simulations based on the realistic ESCOMPTE GPS network configuration. Without a priori information, the absolute value of water vapour is less resolved as opposed to relative horizontal variations. During the ESCOMPTE field experiment, a dense network of 17 dual frequency GPS receivers was operated for 2 weeks within a 20×20-km area around Marseille (southern France). The network extends from sea level to the top of the Etoile chain (∼700 m high). Optimal results have been obtained with time windows of 30-min intervals and input data evaluation every 15 min. The optimal grid for the ESCOMTE geometrical configuration has a horizontal step size of 0.05°×0.05° and 500 m vertical step size. Second, we have compared the results of real data inversions with independent observations. Three inversions have been compared to three successive radiosonde launches and shown to be consistent. A good resolution compared to the a priori information is obtained up to heights of 3000 m. A humidity spike at 4000-m altitude remains unresolved. The reason is probably that the signal is spread homogeneously over the whole network and that such a feature is not resolvable by tomographic techniques. The results of our pure GPS inversion show a correlation with meteorological phenomena. Our measurements could be related to the land-sea breeze. Undoubtedly, tomography has some interesting potential for the water vapour cycle studies at small temporal and spatial scales. © 2004 Elsevier B.V. All rights reserved. |
BibTeX:
@inproceedings{2005AtmRe..74..253C,
author = {Champollion, Cedric and Masson, F. and Bouin, M. N. and Walpersdorf, A. and Doerflinger, E. and Bock, O. and Van Baelen, J.},
title = {GPS water vapour tomography: Preliminary results from the ESCOMPTE field experiment},
booktitle = {Atmospheric Research},
year = {2005},
volume = {74},
number = {1-4},
pages = {253--274},
doi = {10.1016/j.atmosres.2004.04.003}
}
|
| Champollion C, Masson F, Brenot H, Ducrocq V and Walpersdorf A (2004), "Theoretical Studies And Applications Of Regional 4D GPS Tropospheric Tomography", AGU Fall Meeting Abstracts., dec, 2004.
[BibTeX] |
BibTeX:
@article{2004AGUFM.G53A0117C,
author = {Champollion, C and Masson, F and Brenot, H and Ducrocq, V and Walpersdorf, A},
title = {Theoretical Studies And Applications Of Regional 4D GPS Tropospheric Tomography},
journal = {AGU Fall Meeting Abstracts},
year = {2004}
}
|
| Champollion C, Masson F, Doerflinger E, van Baelen J, Anquetin S, Walpersdorf A, Chéry J and Bock O (2003), "GPS observation of the September 9th 2002 Torrential rainfall in southern France (Gard-Cévennes).", In EGS - AGU - EUG Joint Assembly., apr, 2003.
[BibTeX] |
BibTeX:
@inproceedings{2003EAEJA.....5517C,
author = {Champollion, C and Masson, F and Doerflinger, E and van Baelen, J and Anquetin, S and Walpersdorf, A and Chéry, J and Bock, O},
title = {GPS observation of the September 9th 2002 Torrential rainfall in southern France (Gard-Cévennes).},
booktitle = {EGS - AGU - EUG Joint Assembly},
year = {2003}
}
|
| Champollion C, Masson F, Van Baelen J, Walpersdorf A, Chéry J and Doerflinger E (2004), "GPS monitoring of the tropospheric water vapor distribution and variation during the 9 September 2002 torrential precipitation episode in the Cévennes (southern France)", Journal of Geophysical Research D: Atmospheres., dec, 2004. Vol. 109(24), pp. 1-15. |
| Abstract: On 8-9 September 2002, torrential rainfall and flooding hit the Gard region in southern France causing extensive damages and casualties. This is an exceptional example of a so-called Cevenol episode with 24 hour cumulative rainfall up to about 600 mm at some places and more than 200 mm over a large area (5500 km(2)). In this work we have used GPS data to determine integrated water vapor (IWV) as well as horizontal wet gradients and residuals. Using the IWV, we have monitored the evolution of the convective system associated with the rainfall from the water vapor accumulation stage through the stagnation of the convective cell and finally to the breakup of the system. Our interpretation of the GPS meteorological parameters is supported by synoptic maps, numerical weather analyses, and rain images from meteorological radars. We have evidenced from GPS data that this heavy precipitation is associated with ongoing accumulation of water vapor, even through the raining period, but that rain stopped as soon as the weather circulation pattern changed. The evolution of this event is typical in the context of the Cevenol meteorology. Furthermore, we have shown that the horizontal wet gradients help describe the heterogeneity of the water vapor field and holds information concerning the passage of the convective system. Finally, we have noticed that the residuals, which in theory should be proportional to water vapor heterogeneity, were also highly perturbed by the precipitation itself. In our conclusions we discuss the interest of a regional GPS network for monitoring and for future studies on water vapor tomography. |
BibTeX:
@article{2004JGRD..10924102C,
author = {Champollion, Cedric and Masson, F. and Van Baelen, J. and Walpersdorf, A. and Chéry, J. and Doerflinger, E.},
title = {GPS monitoring of the tropospheric water vapor distribution and variation during the 9 September 2002 torrential precipitation episode in the Cévennes (southern France)},
journal = {Journal of Geophysical Research D: Atmospheres},
year = {2004},
volume = {109},
number = {24},
pages = {1--15},
doi = {10.1029/2004JD004897}
}
|
| Collilieux X and Wöppelmann G (2011), "Global sea-level rise and its relation to the terrestrial reference frame", Journal of Geodesy., oct, 2011. Vol. 85(1), pp. 9-22. Springer Science $mathplus Business Media. |
| Abstract: We examined the sensitivity of estimates of global sea-level rise obtained from GPS-corrected long term tide gauge records to uncertainties in the International Terrestrial Reference Frame (ITRF) realization. A useful transfer function was established, linking potential errors in the reference frame datum (origin and scale) to resulting errors in the estimate of global sea level rise. Contrary to scale errors that are propagated by a factor of 100%, the impact of errors in the origin depends on the network geometry. The geometry of the network analyzed here resulted in an error propagation factor of 50% for the Z component of the origin, mainly due to the asymmetry in the distribution of the stations between hemispheres. This factor decreased from 50% to less than 10% as the geometry of the network improved using realistic potential stations that did not yet meet the selection criteria (e.g., record length, data availability). Conversely, we explored new constraints on the reference frame by considering forward calculations involving tide gauge records. A reference frame could be found in which the scatter of the regional sea-level rates was limited. The resulting reference frame drifted by 1.36 0.22 mm/year from the ITRF2000 origin in the Z component and by ??0.44 0.22mm/year from the ITRF2005 origin. A bound on the rate of global sea level rise of 1.2 to 1.6mm/year was derived for the past century, depending on the origin of the adopted reference frame. The upper bound is slightly lower than previous estimates of 1.8mm/year discussed in the IPCC fourth report. |
BibTeX:
@article{Collilieux_2010,
author = {Collilieux, Xavier and Wöppelmann, Guy},
title = {Global sea-level rise and its relation to the terrestrial reference frame},
journal = {Journal of Geodesy},
publisher = {Springer Science $mathplus Business Media},
year = {2011},
volume = {85},
number = {1},
pages = {9--22},
url = {http://dx.doi.org/10.1007/s00190-010-0412-4},
doi = {10.1007/s00190-010-0412-4}
}
|
| Crusem R and Monfret T (2013), "La letttre d’information RESIF n°3 Juillet 2013"
[BibTeX] |
BibTeX:
@article{Crusem2013,
author = {Crusem, René and Monfret, Tony},
title = {La letttre d’information RESIF n°3 Juillet 2013},
year = {2013}
}
|
| Delrieu G, Nicol J, Yates E, Kirstetter P-E, Creutin J-D, Anquetin S, Obled C, Saulnier G-M, Ducrocq Vé, Gaume E, Payrastre O, Andrieu H, Ayral P-A, Bouvier C, Neppel L, Livet M, Lang M, Du-Châtelet JP, Walpersdorf A and Wobrock W (2005), "The Catastrophic Flash-Flood Event of 8–9 September 2002 in the Gard Region, France: A First Case Study for the Cévennes–Vivarais Mediterranean Hydrometeorological Observatory", Journal of Hydrometeorology. Vol. 6(1), pp. 34-52. |
| Abstract: Abstract The Cévennes–Vivarais Mediterranean Hydrometeorological Observatory (OHM-CV) is a research initiative aimed at improving the understanding and modeling of the Mediterranean intense rain events that frequently result in devastating flash floods in southern France. A primary objective is to bring together the skills of meteorologists and hydrologists, modelers and instrumentalists, researchers and practitioners, to cope with these rather unpredictable events. In line with previously published flash-flood monographs, the present paper aims at documenting the 8–9 September 2002 catastrophic event, which resulted in 24 casualties and an economic damage evaluated at 1.2 billion euros (i.e., about 1 billion U.S. dollars) in the Gard region, France. A description of the synoptic meteorological situation is first given and shows that no particular precursor indicated the imminence of such an extreme event. Then, radar and rain gauge analyses are used to assess the magnitude of the rain event, which was pa... |
BibTeX:
@article{2005JHyMe...6...34D,
author = {Delrieu, Guy and Nicol, John and Yates, Eddy and Kirstetter, Pierre-Emmanuel and Creutin, Jean-Dominique and Anquetin, Sandrine and Obled, Charles and Saulnier, Georges-Marie and Ducrocq, Véronique and Gaume, Eric and Payrastre, Olivier and Andrieu, Hervé and Ayral, Pierre-Alain and Bouvier, Christophe and Neppel, Luc and Livet, Marc and Lang, Michel and Du-Châtelet, Jacques Parent and Walpersdorf, Andrea and Wobrock, Wolfram},
title = {The Catastrophic Flash-Flood Event of 8–9 September 2002 in the Gard Region, France: A First Case Study for the Cévennes–Vivarais Mediterranean Hydrometeorological Observatory},
journal = {Journal of Hydrometeorology},
year = {2005},
volume = {6},
number = {1},
pages = {34--52},
url = {http://journals.ametsoc.org/doi/full/10.1175/JHM-400.1},
doi = {10.1175/JHM-400.1}
}
|
| Ducrocq V, Belamari S, Boudevillain B, Bousquet O, Cocquerez P, Doerenbecher a, Drobinski P, Flamant C, Labatut L, Lambert D, Nuret M, Richard E, Roussot O, Testor P, Arbogast P, Ayral P-a, Baelen JV, Basdevant C, Boichard J-L, Bourras D, Bouvier C, Bouin M-N, Bock O, Braud I, Champollion C, Coppola L, Coquillat S, Defer E, Delanoe J, Delrieu G, Didon-Lescot J-F, Durand P, Estournel C, Fourrié N, Garrouste O, Giordani H, Coz JL, Michel Y, Nuissier O, Roberts G, Said F, Schwarzenboeck a, Sellegri K, Taupier-Letage I and Vandervaere J-P (2013), "HyMeX, les campagnes de mesures : focus sur les événements extrêmes en Méditerranée", La Météorologie. Vol. 8(80), pp. 37. INIST-CNRS. |
BibTeX:
@article{Ducrocq_2013,
author = {Ducrocq, V. and Belamari, S. and Boudevillain, B. and Bousquet, O. and Cocquerez, P. and Doerenbecher, a. and Drobinski, P. and Flamant, C. and Labatut, L. and Lambert, D. and Nuret, M. and Richard, E. and Roussot, O. and Testor, P. and Arbogast, P. and Ayral, P.-a. and Baelen, J. Van and Basdevant, C. and Boichard, J.-L. and Bourras, D. and Bouvier, C. and Bouin, M.-N. and Bock, O. and Braud, I. and Champollion, C. and Coppola, L. and Coquillat, S. and Defer, E. and Delanoe, J. and Delrieu, G. and Didon-Lescot, J.-F. and Durand, P. and Estournel, C. and Fourrié, N. and Garrouste, O. and Giordani, H. and Coz, J. Le and Michel, Y. and Nuissier, O. and Roberts, G. and Said, F. and Schwarzenboeck, a. and Sellegri, K. and Taupier-Letage, I. and Vandervaere, J.-P.},
title = {HyMeX, les campagnes de mesures : focus sur les événements extrêmes en Méditerranée},
journal = {La Météorologie},
publisher = {INIST-CNRS},
year = {2013},
volume = {8},
number = {80},
pages = {37},
url = {http://hdl.handle.net/2042/48793},
doi = {10.4267/2042/48793}
}
|
| Fallourd R, Harant O, Trouvé E, Nicolas JM, Gay M, Walpersdorf A, Mugnier JL, Serafini J, Roşu D, Bombrun L, Vasile G, Cotte N, Vernier F, Tupin F, Moreau L and Bolon P (2011), "Monitoring temperate glacier displacement by multi-temporal TerraSAR-X images and continuous GPS measurements", IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing., jun, 2011. Vol. 4(2), pp. 372-386. Institute of Electrical & Electronics Engineers (IEEE). |
| Abstract: A new generation of space-borne SAR sensors were launched in 2006-2007 with ALOS, TerraSAR-X, COSMO-Sky-Med and RadarSat-2 satellites. The data available in different bands (L, C and X bands), with High Resolution (HR) or multi-polarization modes offer new possibilities to monitor glacier displacement and surface evolution by SAR remote sensing. In this paper, the first results obtained with TerraSAR-X HR SAR image time series acquired over the temperate glaciers of the Chamonix Mont-Blanc test site are presented. This area involves well-known temperate glaciers which have been monitored and instrumented i.e. stakes for annual displacement/ablation, GPS for surface displacement and cavitometer for basal displacement, for more than 50 years. The potential of 11-day repeated X-band HR SAR data for Alpine glacier monitoring is investigated by a combined use of in situ measurements and multi-temporal images. Interpretations of HR images, analysis of interferometric pairs and performance assessments of target/texture tracking methods for glacier motion estimation are presented. The results obtained with four time series covering the Chamonix Mont-Blanc glaciers over one year show that the phase information is rarely preserved after 11 days on such glaciers, whereas the high resolution intensity information allows the main glacier features to be observed and displacement fields on the textured areas to be derived. |
BibTeX:
@article{Fallourd_2011,
author = {Fallourd, Renaud and Harant, Olivier and Trouvé, Emmanuel and Nicolas, Jean Marie and Gay, Michel and Walpersdorf, Andrea and Mugnier, Jean Louis and Serafini, Jonathan and Roşu, Diana and Bombrun, Lionel and Vasile, Gabriel and Cotte, Nathalie and Vernier, Flavien and Tupin, Florence and Moreau, Luc and Bolon, Philippe},
title = {Monitoring temperate glacier displacement by multi-temporal TerraSAR-X images and continuous GPS measurements},
journal = {IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing},
publisher = {Institute of Electrical & Electronics Engineers (IEEE)},
year = {2011},
volume = {4},
number = {2},
pages = {372--386},
url = {http://dx.doi.org/10.1109/jstars.2010.2096200},
doi = {10.1109/JSTARS.2010.2096200}
}
|
| Fuhrmann T, Heck B, Knöpfler A, Masson F, Mayer M, Ulrich P, Westerhaus M and Zippelt K (2013), "Recent surface displacements in the Upper Rhine Graben - Preliminary results from geodetic networks", Tectonophysics., aug, 2013. Vol. 602, pp. 300-315. Elsevier BV. |
| Abstract: Datasets of the GNSS Upper Rhine Graben Network (GURN) and the national levelling networks in Germany, France and Switzerland are investigated with respect to current surface displacements in the Upper Rhine Graben (URG) area. GURN consists of about 80 permanent GNSS (Global Navigation Satellite Systems) stations. The terrestrial levelling network comprises 1st and 2nd order levelling lines that have been remeasured at intervals of roughly 25. years, starting in 1922. Compared to earlier studies national institutions and private companies made available raw data, allowing for consistent solutions for the URG region. We focussed on the southern and eastern parts of the investigation area. Our preliminary results show that the levelling and GNSS datasets are sensitive to resolve small surface displacement rates down to an order of magnitude of 0.2. mm/a and 0.4. mm/a, respectively. The observed horizontal velocity components for a test region south of Strasbourg, obtained from GNSS coordinate time series, vary around 0.5. mm/a. The results are in general agreement with interseismic strain built-up in a sinistral strike-slip regime. Since the accuracy of the GNSS derived vertical component is insufficient, data of precise levelling networks is used to determine vertical displacement rates. More than 75% of the vertical rates obtained from a kinematic adjustment of 1st order levelling lines in the eastern part of URG vary between - 0.2. mm/a and +. 0.2. mm/a, indicating that this region behaves stable. Higher rates up to 0.5. mm/a in a limited region south of Freiburg are in general agreement with active faulting. We conclude that both networks deliver stable results that reflect real surface movements in the URG area. We note, however, that geodetically observed surface displacements generally result from a superposition of different effects, and that a separation in tectonic and non-tectonic processes needs additional information and expertise. ?? 2012 Elsevier B.V. |
BibTeX:
@article{2013Tectp.602..300F,
author = {Fuhrmann, Thomas and Heck, Bernhard and Knöpfler, Andreas and Masson, Frédéric and Mayer, Michael and Ulrich, Patrice and Westerhaus, Malte and Zippelt, Karl},
title = {Recent surface displacements in the Upper Rhine Graben - Preliminary results from geodetic networks},
journal = {Tectonophysics},
publisher = {Elsevier BV},
year = {2013},
volume = {602},
pages = {300--315},
url = {http://dx.doi.org/10.1016/j.tecto.2012.10.012},
doi = {10.1016/j.tecto.2012.10.012}
}
|
| Fund F, Morel L and Mocquet A (2011), "A discussion of height reductions for Zenith Hydrostatic Delays derived from weather models", Journal of Applied Geodesy., jan, 2011. Vol. 5(2), pp. 71-80. Walter de Gruyter GmbH. |
| Abstract: Abstract Accurate a priori Zenith Hydrostatic Delays (ZHDs) are required during the processing of space geodetic observations. The data provided by the European Centre for Medium-Range Weather Forecasts (ECMWF) are routinely processed and translated in terms of ZHDs by the Vienna University of Technology. The usual way to compute gridded ZHDs at a particular location is to correct the four nearest nodes of the grid for their difference in height with respect to the site height and to then interpolate these reduced values. This paper compares and discusses the performance achieved by five methods of reduction that have been proposed in the literature. The interpolated ZHD values are compared with the site-specific ones for a global network of 363 sites over a three-year period. The methods that only use vertical profiles of atmospheric pressure lead to annual signals that are correlated with ground temperature, while the methods that take temperature into account do not contain such annual signals. The reduction methods that use a constant temperature lead to errors of 2 mm in terms of equivalent height. We also find that the a posteriori errors of the reduced gridded ZHDs are strongly correlated with the pressure over temperature ratio. We recommend that gridded ZHDs be reduced with the combination of both pressure and temperature when processing space geodetic observations. Abstract Accurate a priori Zenith Hydrostatic Delays (ZHDs) are required during the processing of space geodetic observations. The data provided by the European Centre for Medium-Range Weather Forecasts (ECMWF) are routinely processed and translated in terms of ZHDs by the Vienna University of Technology. The usual way to compute gridded ZHDs at a particular location is to correct the four nearest nodes of the grid for their difference in height with respect to the site height and to then interpolate these reduced values. This paper compares and discusses the performance achieved by five methods of reduction that have been proposed in the literature. The interpolated ZHD values are compared with the site-specific ones for a global network of 363 sites over a three-year period. The methods that only use vertical profiles of atmospheric pressure lead to annual signals that are correlated with ground temperature, while the methods that take temperature into account do not contain such annual signals. The reduction methods that use a constant temperature lead to errors of 2 mm in terms of equivalent height. We also find that the a posteriori errors of the reduced gridded ZHDs are strongly correlated with the pressure over temperature ratio. We recommend that gridded ZHDs be reduced with the combination of both pressure and temperature when processing space geodetic observations. |
BibTeX:
@article{Fund_2011,
author = {Fund, F and Morel, L and Mocquet, A},
title = {A discussion of height reductions for Zenith Hydrostatic Delays derived from weather models},
journal = {Journal of Applied Geodesy},
publisher = {Walter de Gruyter GmbH},
year = {2011},
volume = {5},
number = {2},
pages = {71--80},
url = {citeulike-article-id:9649443$nhttp://dx.doi.org/10.1515/jag.2011.006},
doi = {doi: 10.1515/jag.2011.006}
}
|
| Fund F, Morel L and Mocquet A (2012), "Assessment of the $protectFES2004 Derived $protectOTL Model in the West of $protectFrance and Preliminary Results About Impacts of Tropospheric Models", In Geodesy for Planet Earth., jul, 2012. Vol. 136, pp. 573-579. Springer Science $mathplus Business Media. |
BibTeX:
@incollection{FundMorelMocquet2012,
author = {Fund, F and Morel, L and Mocquet, A},
title = {Assessment of the $protectFES2004 Derived $protectOTL Model in the West of $protectFrance and Preliminary Results About Impacts of Tropospheric Models},
booktitle = {Geodesy for Planet Earth},
publisher = {Springer Science $mathplus Business Media},
year = {2012},
volume = {136},
pages = {573--579},
url = {http://dx.doi.org/10.1007/978-3-642-20338-170},
doi = {10.1007/978-3-642-20338-1{\_}70}
}
|
| Fund F, Morel L, Mocquet A and Boehm J (2011), "Assessment of ECMWF-derived tropospheric delay models within the EUREF Permanent Network", GPS Solutions., mar, 2011. Vol. 15(1), pp. 39-48. Springer Science $mathplus Business Media. |
BibTeX:
@article{Fund_2010,
author = {Fund, F. and Morel, L. and Mocquet, A. and Boehm, J.},
title = {Assessment of ECMWF-derived tropospheric delay models within the EUREF Permanent Network},
journal = {GPS Solutions},
publisher = {Springer Science $mathplus Business Media},
year = {2011},
volume = {15},
number = {1},
pages = {39--48},
url = {http://dx.doi.org/10.1007/s10291-010-0166-8},
doi = {10.1007/s10291-010-0166-8}
}
|
| Gardi A, Baize S and Scotti O (2010), "Present-day vertical isostatic readjustment of the Western Alps revealed by numerical modelling and geodetic and seismotectonic data", Advances in Interpretation of Geological Processes: Refinement of Multi-Scale Data and Integration in Numerical Modelling., jan, 2010. Vol. 332(1), pp. 115-128. Geological Society of London. |
| Abstract: The active tectonics of the Western Alps reveals contrasting regimes: ongoing extension at the heart of the chain and transpression-compression at its external sectors. The active processes currently affecting this region are still a matter of debate. The classical models proposed in the literature invoke: Eurasia-Adria plate collision, counterclockwise motion of the Adria microplate, slab retreat of the subducted continental lithosphere and slab-detachment. More recently, several authors prefer the hypothesis of tectonics driven by isostasy-buoyancy forces. To better understand the influence of these processes on the velocity, strain and stress fields at the surface and in the crust, we developed 2D viscoelastic numerical models along a vertical cross-section perpendicular to the Western Alps. We run our models with different driving forces in order to investigate, one by one, the geodynamic processes proposed in the literature. Results are compared with available geodetic, geological and seismotectonic data. In order to bring into coincidence model predictions and observations, an important vertical isostatic readjustment must be included in the modelling, together with a slight horizontal compression (0.5 mm year(-1)), probably due to Africa-Eurasia convergence. We show that the subduction process in this Alpine region is likely to be dead and that buoyancy forces may be dominating the present-day tectonics. |
BibTeX:
@article{Gardi_2010,
author = {Gardi, A and Baize, S and Scotti, O},
title = {Present-day vertical isostatic readjustment of the Western Alps revealed by numerical modelling and geodetic and seismotectonic data},
journal = {Advances in Interpretation of Geological Processes: Refinement of Multi-Scale Data and Integration in Numerical Modelling},
publisher = {Geological Society of London},
year = {2010},
volume = {332},
number = {1},
pages = {115--128},
url = { |
| Koulali A, Ouazar D, Tahayt A, King RW, Vernant P, Reilinger RE, McClusky S, Mourabit T, Davila JM and Amraoui N (2011), "New GPS constraints on active deformation along the Africa-Iberia plate boundary", Earth and Planetary Science Letters., aug, 2011. Vol. 308(1-2), pp. 211-217. Elsevier BV. |
| Abstract: We use velocities from 65 continuous stations and 31 survey-mode GPS sites as well as kinematic modeling to investigate present day deformation along the Africa-Iberia plate boundary zone in the western Mediterranean region. The GPS velocity field shows southwestward motion of the central part of the Rif Mountains in northern Morocco with respect to Africa varying between 3.5 and 4.0. mm/yr, consistent with prior published results. Stations in the southwestern part of the Betic Mountains of southern Spain move west-southwest with respect to Eurasia ( 2-3. mm/yr). The western component of Betics motion is consistent with partial transfer of Nubia-Eurasia plate motion into the southern Betics. The southward component of Betics motion with respect to Iberia is kinematically consistent with south to southwest motion of the Rif Mountains with respect to Africa. We use block modeling, constrained by mapped surface faults and seismicity to estimate the geometry and rates of strain accumulation on plate boundary structures. Our preferred plate boundary geometry includes one block between Iberia and Africa including the SW Betics, Alboran Sea, and central Rif. This geometry provides a good fit to the observed motions, suggesting a wide transpressive boundary in the westernmost Mediterranean, with deformation mainly accommodated by the Gloria-Azores fault system to the West and the Rif-Tell lineament to the East. Block boundaries encompass aspects of earlier interpretations suggesting three main deformation styles: (i) extension along the NE-SW trending Trans-Alboran shear zone, (ii) dextral strike-slip in the Betics corresponding to a well defined E-W seismic lineament, and (iii) right lateral strike-slip motion extending West to the Azores and right-lateral motion with compression extending East along the Algerian Tell. We interpret differential motion in the Rif-Alboran-Betic system to be driven both by surface processes related the Africa-Eurasia oblique convergence and sub-crustal dynamic processes associated with the long history of subduction of the Neotethys ocean lithosphere. The dextral slip identified in the Betic Mountains in Southern Spain may be related to the offshore fault that produced the Great 1755 Lisbon Earthquake, and as such may represent a significant seismic hazard for the West Mediterranean region. ?? 2011 Elsevier B.V. |
BibTeX:
@article{Koulali_2011,
author = {Koulali, A. and Ouazar, D. and Tahayt, A. and King, R. W. and Vernant, P. and Reilinger, R. E. and McClusky, S. and Mourabit, T. and Davila, J. M. and Amraoui, N.},
title = {New GPS constraints on active deformation along the Africa-Iberia plate boundary},
journal = {Earth and Planetary Science Letters},
publisher = {Elsevier BV},
year = {2011},
volume = {308},
number = {1-2},
pages = {211--217},
url = {http://dx.doi.org/10.1016/j.epsl.2011.05.048},
doi = {10.1016/j.epsl.2011.05.048}
}
|
| Labbouz L, Van Baelen J and Duroure C (2015), "Investigation of the links between water vapor field evolution and rain rate based on 5 years of measurements at a midlatitude site", Geophysical Research Letters., nov, 2015. Vol. 42(21), pp. 9538-9545. |
BibTeX:
@article{2015GeoRL..42.9538L,
author = {Labbouz, Laurent and Van Baelen, Joël and Duroure, Christophe},
title = {Investigation of the links between water vapor field evolution and rain rate based on 5 years of measurements at a midlatitude site},
journal = {Geophysical Research Letters},
year = {2015},
volume = {42},
number = {21},
pages = {9538--9545},
doi = {10.1002/2015GL066048}
}
|
| Labbouz L, Van Baelen J, Tridon F, Reverdy M, Hagen M, Bender M, Dick G, Gorgas T and Planche C (2013), "Precipitation on the lee side of the Vosges Mountains: Multi-instrumental study of one case from the COPS campaign", Meteorologische Zeitschrift. Vol. 22(4), pp. 413-432. Schweizerbart. |
BibTeX:
@article{Labbouz_2013,
author = {Labbouz, L. and Van Baelen, J. and Tridon, F. and Reverdy, M. and Hagen, M. and Bender, M. and Dick, G. and Gorgas, T. and Planche, C.},
title = {Precipitation on the lee side of the Vosges Mountains: Multi-instrumental study of one case from the COPS campaign},
journal = {Meteorologische Zeitschrift},
publisher = {Schweizerbart},
year = {2013},
volume = {22},
number = {4},
pages = {413--432},
url = {http://openurl.ingenta.com/content/xref?genre=article&issn=0941-2948&volume=22&issue=4&spage=413},
doi = {10.1127/0941-2948/2013/0413}
}
|
| Larroque C, Delouis B, Godel Bé and Nocquet JM (2009), "Active deformation at the southwestern Alps-Ligurian basin junction (France-Italy boundary): Evidence for recent change from compression to extension in the Argentera massif", Tectonophysics., mar, 2009. Vol. 467(1-4), pp. 22-34. Elsevier BV. |
| Abstract: Several hundred earthquakes of small and moderate magnitude occur each year at the southwestern Alps-Ligurian basin junction. In addition, the historical seismicity data attests for earthquakes of magnitude close to 6.5. Despite the seismic hazard and the vulnerability of this region, the present-day driving mechanism of deformation and the major structures accommodating these deformations remain unclear. This littoral area presents a strong topographic gradient from 3000 masl on the Argentera alpine massif to 2500 m.u.s.l. in the Ligurian basin and a strong structural inheritage resulting from 50 My geological evolution combining different processes such as continental collision and ocean basin opening. We present new results about the kinematics of the Corsica-Sardinia continental block with respect to the western alpine belt. From 7 years of continuous GPS measurements we show that a small part of the Nubia-Eurasia convergence is certainly transferred northward of the Maghrebides deformation belts to the Corsica-Sardinia block. In the southwesternmost Alps from Torino to the Mediterranean coast, the baselines reveal differential motions of lengthening between the Po plain and the Argentera and shortening between the Argentera and the Ligurian domain. In a region where few focal solutions are available we determine seven new focal mechanisms located in the Argentera massif. These new data underline a quaternary change from compression to extension in that part of the western alpine belt. The focal mechanisms calculated attest for extensional faulting at shallow level between 1 and 11 km depth. We add 7 focal mechanisms from the literature to calculate the stress tensor: a homogeneous solution indicates a direction of extension broadly perpendicular to the topographic axis culmination of the Argentera. In contrast, the earthquakes recorded below 15 km at the northwestern margin of the Po plain testify reverse faulting and a compressional state of stress in the deep crust. Thus, we point out that the stress field is vertically heterogeneous in the crust of the Argentera area. The Ligurian domain is mainly characterized by reverse and strike-slip faulting. The major earthquakes are located in the northern margin and at the ocean-continent transition. These earthquakes are assumed to result from the reactivation, in a compressional state of stress, of the structures formed during the Oligo-Miocene opening of the Ligurian basin. Finally, we propose three hypotheses to explain the current deformation at the Alps-Ligurian basin junction, taking into account the far-field kinematics between the Nubia and the Eurasia plates, the topographic gradient between the Argentera massif and the Ligurian oceanic floor and the distribution of the deformations. © 2009 Elsevier B.V. All rights reserved. |
BibTeX:
@article{Larroque_2009,
author = {Larroque, Christophe and Delouis, Bertrand and Godel, Bélinda and Nocquet, Jean Mathieu},
title = {Active deformation at the southwestern Alps-Ligurian basin junction (France-Italy boundary): Evidence for recent change from compression to extension in the Argentera massif},
journal = {Tectonophysics},
publisher = {Elsevier BV},
year = {2009},
volume = {467},
number = {1-4},
pages = {22--34},
url = {http://dx.doi.org/10.1016/j.tecto.2008.12.013},
doi = {10.1016/j.tecto.2008.12.013}
}
|
| Mayer M, Knöpfler A, Heck B, Masson F, Ulrich P and Ferhat G (2012), "GURN (GNSS upper Rhine Graben network): Research goals and first results of a transnational geo-scientific network", In International Association of Geodesy Symposia., jul, 2012. Vol. 136, pp. 673-681. Springer Science $mathplus Business Media. |
BibTeX:
@incollection{Mayer_2011,
author = {Mayer, M. and Knöpfler, A. and Heck, B. and Masson, F. and Ulrich, P. and Ferhat, G.},
title = {GURN (GNSS upper Rhine Graben network): Research goals and first results of a transnational geo-scientific network},
booktitle = {International Association of Geodesy Symposia},
publisher = {Springer Science $mathplus Business Media},
year = {2012},
volume = {136},
pages = {673--681},
url = {http://link.springer.com/10.1007/978-3-642-20338-183},
doi = {10.1007/978-3-642-20338-1{\_}83}
}
|
| Nguyen HN, Vernant P, Mazzotti S, Khazaradze G and Asensio E (2016), "3-D GPS velocity field and its implications on the present-day post-orogenic deformation of the Western Alps and Pyrenees", Solid Earth. Vol. 7(5), pp. 1349-1363. |
BibTeX:
@article{Nguyen2016,
author = {Nguyen, Hai Ninh and Vernant, Philippe and Mazzotti, Stephane and Khazaradze, Giorgi and Asensio, Eva},
title = {3-D GPS velocity field and its implications on the present-day post-orogenic deformation of the Western Alps and Pyrenees},
journal = {Solid Earth},
year = {2016},
volume = {7},
number = {5},
pages = {1349--1363},
doi = {10.5194/se-7-1349-2016}
}
|
| Nicolas J, Durand S, Vergnolle M, Morel L, Melachroinos S, Bouin MN and Fund F (2012), "Ocean Loading in Brittany, Northwest France: Impact of the GPS Analysis Strategy", In International Association of Geodesy Symposia., oct, 2012. Vol. 137, pp. 367-372. Springer Science $mathplus Business Media. |
BibTeX:
@incollection{NicolasDurandVergnolleEtAl2012,
author = {Nicolas, Joëlle and Durand, Stéphane and Vergnolle, Mathilde and Morel, Laurent and Melachroinos, Stavros and Bouin, Marie Noëlle and Fund, François},
title = {Ocean Loading in Brittany, Northwest France: Impact of the GPS Analysis Strategy},
booktitle = {International Association of Geodesy Symposia},
publisher = {Springer Science $mathplus Business Media},
year = {2012},
volume = {137},
pages = {367--372},
url = {http://link.springer.com/10.1007/978-3-642-22078-455},
doi = {10.1007/978-3-642-22078-4{\_}55}
}
|
| Nicolas J, Perosanz F, Rigo A, Le Bliguet G, Morel L and Fund F (2012), "Impact of loading phenomena on velocity field computation from GPS campaigns: Application to ResPyr GPS campaign in the Pyrenees", In International Association of Geodesy Symposia., jul, 2012. Vol. 136, pp. 643-649. Springer Science $mathplus Business Media. |
BibTeX:
@incollection{Nicolas_2011,
author = {Nicolas, J. and Perosanz, F. and Rigo, A. and Le Bliguet, G. and Morel, L. and Fund, F.},
title = {Impact of loading phenomena on velocity field computation from GPS campaigns: Application to ResPyr GPS campaign in the Pyrenees},
booktitle = {International Association of Geodesy Symposia},
publisher = {Springer Science $mathplus Business Media},
year = {2012},
volume = {136},
pages = {643--649},
url = {http://link.springer.com/10.1007/978-3-642-20338-179},
doi = {10.1007/978-3-642-20338-1{\_}79}
}
|
| Nocquet JM (2012), "Present-day kinematics of the Mediterranean: A comprehensive overview of GPS results", Tectonophysics., dec, 2012. Vol. 579, pp. 220-242. Elsevier B.V.. |
| Abstract: I combine recently published GPS results to derive a geodetic horizontal velocity field consistent at the scale of the Mediterranean and the surrounding Alpine belts. The velocity field is then used to discuss the boundary conditions around each major deforming area in the Mediterranean, to describe the main patterns of motion and deformation, to critically review the existing kinematics models and to finally point out the main unresolved kinematics questions. Strain rate in Europe north of the Alpines belt is dominated by the signature of the Glacial Isostatic Adjustment and tectonic strain remains below the current accuracy of GPS results. In the western Mediterranean, deformation is restricted to the Betics, the Alboran and the Morrocan Rif, with west-to-southwestward motion with respect to Iberia, which is part of stable Europe. Shortening, consistent with the relative Nubia/Eurasia plate motion, is found throughout the Maghrebides, but the distribution of deformation in northern Africa remains largely unknown. The central Mediterranean is dominated by the counter-clockwise rotation of the Adriatic. The junction between the southern Adriatic domain and Nubia has yet to be firmly established. The deformation over a wide area, east of the Maghrebides, in Tunisia and the gulf of Sirte in Libya still remains to be quantified. In the eastern Mediterranean, the velocity field is dominated by a general anti-clockwise rotation and a general trend towards the Hellenic trench, with velocity magnitude increasing with decreasing distances from the trench. This trend is observed not only in the Aegean and Anatolia, but also in the southern Balkans. Geodetic results emphasize that the convergence of the Nubia and Arabia plates towards Eurasia directly controls the deformation across only very few segments along the plate boundary zone. Additional processes are therefore required to explain the observed velocity field and deformation pattern. ?? 2012 Elsevier B.V. |
BibTeX:
@article{2012Tectp.579..220N,
author = {Nocquet, Jean Mathieu},
title = {Present-day kinematics of the Mediterranean: A comprehensive overview of GPS results},
journal = {Tectonophysics},
publisher = {Elsevier B.V.},
year = {2012},
volume = {579},
pages = {220--242},
url = {http://linkinghub.elsevier.com/retrieve/pii/S0040195112001953},
doi = {10.1016/j.tecto.2012.03.037}
}
|
| Nocquet J-M, Sue C, Walpersdorf A, Tran T, Lenôtre N, Vernant P, Cushing M, Jouanne F, Masson F, Baize S, Chéry J, van der Beek PA, Tapponnier P, Ménard G, Molnar P, Schmid SM, Kissling E, Wortel MJ, Spakman W, Nocquet J-M, Calais E, Larroque C, Delouis B, Godel B, Nocquet JM, Serpelloni E, Faccenna C, Spada G, Dong D, Williams SDP, Gardi A, Baize S, Scotti O, Stocchi P, Spada G, Cianetti S, Chéry J, Genti M, Vernant P, Barletta VR, Braun J, Simon-Labric T, Murray KE, Reiners PW, Champagnac JD, Molnar P, Anderson RS, Sue C, Delacou B, Kuhlemann J, Frisch W, Székely B, Dunkl I, Kázmér M, Valla PG, Shuster DL, van der Beek P, Glotzbach C, van der Beek PA, Spiegel C, Small EE, Anderson RS, Koppes MN, Montgomery DR, Glotzbach C, Beek PVD, Carcaillet J, Delunel R, Delunel R, van der Beek Pa, Carcaillet J, Bourlès DL, Valla PG, Hinderer M, Kastowski M, Kamelger A, Bartolini C, Schlunegger F, England P, Molnar P, Lyon-Caen H, Molnar P, Lippitsch R, Fox M, Herman F, Kissling E, Willett SD, Baran R, Friedrich aM, Schlunegger F, Bennett Ra, Fay NP, Hreinsdóttir S, Chase C, Zandt G, Calais E, Nocquet J-M, Jouanne F, Tardy M, Selverstone J, Sue C, Walpersdorf a and Vernant P (2016), "Present-day uplift of the western Alps", Scientific Reports., jun, 2016. Vol. 6(March), pp. 28404. Nature Publishing Group. |
BibTeX:
@article{2016NatSR...628404N,
author = {Nocquet, J.-M. and Sue, C. and Walpersdorf, A. and Tran, T. and Lenôtre, N. and Vernant, P. and Cushing, M. and Jouanne, F. and Masson, F. and Baize, S. and Chéry, J. and van der Beek, P. A. and Tapponnier, P. and Ménard, G. and Molnar, P. and Schmid, S. M. and Kissling, E. and Wortel, M. J. and Spakman, W. and Nocquet, J.-M. and Calais, E. and Larroque, C. and Delouis, B. and Godel, B. and Nocquet, J. M. and Serpelloni, E. and Faccenna, C. and Spada, G. and Dong, D. and Williams, S. D. P. and Gardi, A. and Baize, S. and Scotti, O. and Stocchi, P. and Spada, G. and Cianetti, S. and Chéry, J. and Genti, M. and Vernant, P. and Barletta, V. R. and Braun, J. and Simon-Labric, T. and Murray, K. E. and Reiners, P. W. and Champagnac, J. D. and Molnar, P. and Anderson, R. S. and Sue, C. and Delacou, B. and Kuhlemann, J. and Frisch, W. and Székely, B. and Dunkl, I. and Kázmér, M. and Valla, P. G. and Shuster, D. L. and van der Beek, P. and Glotzbach, C. and van der Beek, P. A. and Spiegel, C. and Small, E. E. and Anderson, R. S. and Koppes, M. N. and Montgomery, D. R. and Glotzbach, C. and Beek, P. Van Der and Carcaillet, J. and Delunel, R. and Delunel, R. and van der Beek, P. a. and Carcaillet, J. and Bourlès, D. L. and Valla, P. G. and Hinderer, M. and Kastowski, M. and Kamelger, A. and Bartolini, C. and Schlunegger, F. and England, P. and Molnar, P. and Lyon-Caen, H. and Molnar, P. and Lippitsch, R. and Fox, M. and Herman, F. and Kissling, E. and Willett, S. D. and Baran, R. and Friedrich, a M. and Schlunegger, F. and Bennett, R. a. and Fay, N. P. and Hreinsdóttir, S. and Chase, C. and Zandt, G. and Calais, E. and Nocquet, J.-M. and Jouanne, F. and Tardy, M. and Selverstone, J. and Sue, C. and Walpersdorf, a. and Vernant, P.},
title = {Present-day uplift of the western Alps},
journal = {Scientific Reports},
publisher = {Nature Publishing Group},
year = {2016},
volume = {6},
number = {March},
pages = {28404},
url = {http://www.nature.com/articles/srep28404},
doi = {10.1038/srep28404}
}
|
| de Oliveira PS, Morel L, Fund F, Legros R, Monico JFG, Durand S and Durand F (2016), "Modeling tropospheric wet delays with dense and sparse network configurations for PPP-RTK", GPS Solutions., jan, 2016. Vol. 21(1), pp. 1-14. |
| Abstract: Precise Point Positioning (PPP) is a well-known technique of positioning by Global Navigation Satellite Systems (GNSS) that provides accurate solutions. With the availability of real-time precise orbit and clock products provided by the International GNSS Service (IGS) and by individual analysis centers such as Centre National d’Etudes Spatiales through the IGS Real-Time Project, PPP in real time is achievable. With such orbit and clock products and using dual-frequency receivers, first-order ionospheric effects can be eliminated by the ionospheric-free combination. Concerning the tropospheric delays, the Zenith Hydrostatic Delays can be quite well modeled, although the Zenith Wet Delays (ZWDs) have to be estimated because they cannot be mitigated by, for instance, observable combinations. However, adding ZWD estimates in PPP processing increases the time to achieve accurate positions. In order to reduce this convergence time, we (1) model the behavior of troposphere over France using ZWD estimates at Orphéon GNSS reference network stations and (2) send the modeling parameters to the GNSS users to be introduced as a priori ZWDs, with an appropriate uncertainty. At the user level, float PPP-RTK is achieved; that is, GNSS data are performed in kinematic mode and ambiguities are kept float. The quality of the modeling is assessed by comparison with tropospheric products published by Institut National de l’Information Géographique et Forestière. Finally, the improvements in terms of required time to achieve 10-cm accuracy for the rover position (simulated float PPP-RTK) are quantified and discussed. Results for 68 % quantiles of absolute errors convergence show that gains for GPS-only positioning with ZWDs derived from the assessed tropospheric modeling are about: 1 % (East), 20 % (North), and 5 % (Up). Since ZWD estimation is correlated with satellite geometry, we also investigated the positioning when processing GPS + GLONASS data, which increases significantly the number of available satellites. The improvements achieved by adding tropospheric corrections in this case are about: 2 % (East), 5 % (North), and 13 % (Up). Finally, a reduction in the number of reference stations by using a sparser network configuration to perform the tropospheric modeling does not degrade the generated tropospheric corrections, and similar performances are achieved. |
BibTeX:
@article{DeOliveira2016,
author = {de Oliveira, P. S. and Morel, L. and Fund, F. and Legros, R. and Monico, J. F G and Durand, S. and Durand, F.},
title = {Modeling tropospheric wet delays with dense and sparse network configurations for PPP-RTK},
journal = {GPS Solutions},
year = {2016},
volume = {21},
number = {1},
pages = {1--14},
url = {http://link.springer.com/10.1007/s10291-016-0518-0},
doi = {10.1007/s10291-016-0518-0}
}
|
| Ponton F, Trouvé E, Gay M, Walpersdorf A, Fallourd R, Nicolas JM, Vernier F and Mugnier JL (2014), "ObServation of the Argentière glacier flow variability from 2009 to 2011 by TerraSAR-X and GPS displacement measurements", IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing., aug, 2014. Vol. 7(8), pp. 3274-3284. Institute of Electrical & Electronics Engineers (IEEE). |
BibTeX:
@article{Ponton_2014,
author = {Ponton, Fanny and Trouvé, Emmanuel and Gay, Michel and Walpersdorf, Andrea and Fallourd, Renaud and Nicolas, Jean Marie and Vernier, Flavien and Mugnier, Jean Louis},
title = {ObServation of the Argentière glacier flow variability from 2009 to 2011 by TerraSAR-X and GPS displacement measurements},
journal = {IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing},
publisher = {Institute of Electrical & Electronics Engineers (IEEE)},
year = {2014},
volume = {7},
number = {8},
pages = {3274--3284},
url = {http://dx.doi.org/10.1109/jstars.2014.2349004},
doi = {10.1109/JSTARS.2014.2349004}
}
|
| Ponton F, Walpersdorf A, Gay M, Trouvé E, Mugnier JL, Fallourd R and Cotte N (2012), "GPS and TerraSAR-X time series measure temperate glacier flow in the Mont Blanc massif ( France ): the Argentière glacier test site .", In EGU General Assembly Conference Abstracts., apr, 2012. Vol. 14, pp. 9525.
[BibTeX] |
BibTeX:
@inproceedings{2012EGUGA..14.9525P,
author = {Ponton, F and Walpersdorf, A and Gay, M and Trouvé, E and Mugnier, J L and Fallourd, R and Cotte, N},
editor = {Abbasi, A and Giesen, N},
title = {GPS and TerraSAR-X time series measure temperate glacier flow in the Mont Blanc massif ( France ): the Argentière glacier test site .},
booktitle = {EGU General Assembly Conference Abstracts},
year = {2012},
volume = {14},
pages = {9525}
}
|
| Rabin M, Sue C and Walpersdorf A (2016), "Active deformations of the Jura arc inferred by GPS and seismotectonics", In EGU General Assembly Conference Abstracts., apr, 2016. Vol. 18, pp. 1845.
[BibTeX] |
BibTeX:
@inproceedings{2016EGUGA..18.1845R,
author = {Rabin, M and Sue, C and Walpersdorf, A},
title = {Active deformations of the Jura arc inferred by GPS and seismotectonics},
booktitle = {EGU General Assembly Conference Abstracts},
year = {2016},
volume = {18},
pages = {1845}
}
|
| Renag Group (2010), "RESIF-RENAG : The French GPS component of a European infrastructure", In EGU General Assembly Conference Abstracts., may, 2010. Vol. 12, pp. 9725.
[BibTeX] |
BibTeX:
@inproceedings{2010EGUGA..12.9725R,
author = {Renag Group},
title = {RESIF-RENAG : The French GPS component of a European infrastructure},
booktitle = {EGU General Assembly Conference Abstracts},
year = {2010},
volume = {12},
pages = {9725}
}
|
| Rigo A, Vernant P, Feigl KL, Goula X, Khazaradze G, Talaya J, Morel L, Nicolas J, Baize S, Ch??ry J and Sylvander M (2015), "Present-day deformation of the pyrenees revealed by GPS surveying and earthquake focal mechanisms until 2011", Geophysical Journal International., mar, 2015. Vol. 201(2), pp. 947-964. Oxford University Press (OUP). |
| Abstract: The Pyrenean mountain range is a slowly deforming belt with continuous and moderate seismic activity. To quantify its deformation field, we present the velocity field estimated from a GPS survey of the Pyrenees spanning 18 yr. The PotSis and ResPyr networks, including a total of 85 GPS sites, were installed and first measured in 1992 and 1995–1997, respectively, and remeasured in 2008 and 2010. We obtain a deformation field with velocities less than 1 mm yr−1 across the range. The estimated velocities for individual stations do not differ significantly from zero with 95 per cent confidence. Even so, we estimate a maximum extensional horizontal strain rate of 2.0 ± 1.7 nanostrain per year in a N–S direction in the western part of the range. We do not interpret the vertical displacements due to their large uncertainties. In order to compare the horizontal strain rates with the seismic activity, we analyse a set of 194 focal mechanisms using three methods: (i) the ‘r’ factor relating their P and T axes, (ii) the stress tensors obtained by fault slip inversion and (iii) the strain-rate tensors. Stress and strain-rate tensors are estimated for: (i) the whole data set, (ii) the eastern and western parts of the range separately, and (iii) eight zones, which are defined based on the seismicity and the tectonic patterns of the Pyrenees. Each of these analyses reveals a lateral variation of the deformation style from compression and extension in the east to extension and strike-slip in the west of the range. Although the horizontal components of the strain-rate tensors estimated from the seismic data are slightly smaller in magnitude than those computed from the GPS velocity field, they are consistent within the 2$ uncertainties. Furthermore, the orientations of their principal axes agree with the mapped active faults. |
BibTeX:
@article{Rigo_2015,
author = {Rigo, A. and Vernant, P. and Feigl, K. L. and Goula, X. and Khazaradze, G. and Talaya, J. and Morel, L. and Nicolas, J. and Baize, S. and Ch??ry, J. and Sylvander, M.},
title = {Present-day deformation of the pyrenees revealed by GPS surveying and earthquake focal mechanisms until 2011},
journal = {Geophysical Journal International},
publisher = {Oxford University Press (OUP)},
year = {2015},
volume = {201},
number = {2},
pages = {947--964},
url = {http://gji.oxfordjournals.org/content/201/2/947.abstract},
doi = {10.1093/gji/ggv052}
}
|
| Rosat S, Boy JP, Ferhat G, Hinderer J, Amalvict M, Gegout P and Luck B (2009), "Analysis of a 10-year (1997-2007) record of time-varying gravity in Strasbourg using absolute and superconducting gravimeters: New results on the calibration and comparison with GPS height changes and hydrology", Journal of Geodynamics., dec, 2009. Vol. 48(3-5), pp. 360-365. Elsevier BV. |
| Abstract: This paper is devoted to a detailed investigation of a continuous record spanning more than 10 years (1997-2007) of the Strasbourg superconducting gravimeter (SG GWR C026). We show the results from various scale factor experiments using parallel registrations with an absolute gravimeter (AG FG5206). These results allow us to discuss the time stability of the calibration of the SG. We also superimpose the AG and SG measurements to infer the long-term instrumental drift behavior of the SG but also the seasonal effects present at our station. These long-term effects are discussed in terms of height changes by using collocated GPS measurements (since 1999) and in terms of hydrology (mainly with large scale hydrological models). The collocated GPS height changes help in separating the gravity variation due to the vertical motion of the station from the variation due to the mass redistribution. ?? 2009 Elsevier Ltd. All rights reserved. |
BibTeX:
@article{Rosat_2009,
author = {Rosat, S. and Boy, J. P. and Ferhat, G. and Hinderer, J. and Amalvict, M. and Gegout, P. and Luck, B.},
title = {Analysis of a 10-year (1997-2007) record of time-varying gravity in Strasbourg using absolute and superconducting gravimeters: New results on the calibration and comparison with GPS height changes and hydrology},
journal = {Journal of Geodynamics},
publisher = {Elsevier BV},
year = {2009},
volume = {48},
number = {3-5},
pages = {360--365},
url = {http://dx.doi.org/10.1016/j.jog.2009.09.026},
doi = {10.1016/j.jog.2009.09.026}
}
|
| Santamara-Gómez A, Bouin MN, Collilieux X and Wöppelmann G (2011), "Correlated errors in GPS position time series: Implications for velocity estimates", Journal of Geophysical Research: Solid Earth., jan, 2011. Vol. 116(1), pp. B01405. Wiley-Blackwell. |
| Abstract: This study focuses on the effects of time correlation in weekly GPS position time series on velocity estimates. Time series 2.5 to 13 years long from a homogeneously reprocessed solution of 275 globally distributed stations are analyzed in terms of noise content and velocity uncertainty assessment. Several noise models were tested, including power law and Gauss-Markov processes. The best noise model describing our global data set was a combination of variable white noise and power law noise models with mean amplitudes of ∼2 mm and ∼6 mm, respectively, for the sites considered. This noise model provided a mean vertical velocity uncertainty of ∼0.3 mm/yr, 4–5 times larger than the uncorrelated data assumption. We demonstrated that correlated noise content with homogeneously reprocessed data is dependent on time series length and, especially, on data time period. Time series of 2–3 years of the oldest data contain noise amplitude similar to that found for time series of 12 years. The data time period should be taken into account when estimating correlated noise content, when comparing different noise estimations, or when applying an external noise estimation to assess velocity uncertainty. We showed that the data period dependency cannot be explained by the increasing tracking network or the ambiguity fixation rate but is probably related to the amount and quality of recorded data. |
BibTeX:
@article{Santamaria_Gomez_2011,
author = {Santamara-Gómez, Alvaro and Bouin, Marie Noëlle and Collilieux, Xavier and Wöppelmann, Guy},
title = {Correlated errors in GPS position time series: Implications for velocity estimates},
journal = {Journal of Geophysical Research: Solid Earth},
publisher = {Wiley-Blackwell},
year = {2011},
volume = {116},
number = {1},
pages = {B01405},
url = {http://dx.doi.org/10.1029/2010jb007701 http://doi.wiley.com/10.1029/2010JB007701},
doi = {10.1029/2010JB007701}
}
|
| Santamara-Gómez A, Bouin MN and Wöppelmann G (2012), "Improved GPS data analysis strategy for tide gauge benchmark monitoring", In International Association of Geodesy Symposia., jul, 2012. Vol. 136, pp. 11-18. Springer Science $mathplus Business Media. |
BibTeX:
@incollection{Santamaria-GomezBouinWoeppelmann2012,
author = {Santamara-Gómez, Alvaro and Bouin, Marie Noëlle and Wöppelmann, Guy},
title = {Improved GPS data analysis strategy for tide gauge benchmark monitoring},
booktitle = {International Association of Geodesy Symposia},
publisher = {Springer Science $mathplus Business Media},
year = {2012},
volume = {136},
pages = {11--18},
url = {http://dx.doi.org/10.1007/978-3-642-20338-12},
doi = {10.1007/978-3-642-20338-1{\_}2}
}
|
| Santamara-Gómez A, Gravelle M, Collilieux X, Guichard M, Mguez BM, Tiphaneau P and Wöppelmann G (2012), "Mitigating the effects of vertical land motion in tide gauge records using a state-of-the-art GPS velocity field", Global and Planetary Change., dec, 2012. Vol. 98-99, pp. 6-17. Elsevier BV. |
| Abstract: This study aims to correct for long-term vertical land motions at tide gauges (TG) by estimating high-accurate GPS vertical velocities at co-located stations (GPS@TG), useful for long-term sea-level change studies and satellite altimeter drift monitoring. Global Positioning System (GPS) data reanalyses are mandatory when aiming at the highest consistency of the estimated products for the whole data period. The University of La Rochelle Consortium (ULR) has carried out several GPS data reanalysis campaigns with an increasing tracking network, an improving processing strategy and the best methodology. The geodetic results from the latest GPS velocity field estimated at ULR (named ULR5) are presented here. The velocity field includes 326 globally distributed GPS stations, from which 200 are GPS@TG (30% more than previous studies). The new GPS data processing strategy, the terrestrial frame definition and the velocity estimation procedures are described. The quality of the estimated vertical velocities is empirically assessed through internal and external velocity comparisons, including the analysis of the time-correlated noise content of the position time series, to be better than 0.6. mm/yr (2 sigma). The application of this velocity field is illustrated to appraise to what extent vertical land motions contaminate the estimates of satellite altimetry drifts. The impact on the altimeter-derived sea level trends was evaluated to be up to 0.6. mm/yr. Worldwide TGs were grouped into regions in order to explore long-term spatial sea level variability in the rates of sea level change. By taking into account the vertical land motion of the tide gauges, the dispersion of the observed sea level rates within each region was reduced by 60%. Long-term regional mean sea level variations up to 70% from the global mean were found. © 2012 Elsevier B.V. |
BibTeX:
@article{Santamaria-GomezGravelleCollilieuxEtAl2012,
author = {Santamara-Gómez, A. and Gravelle, M. and Collilieux, X. and Guichard, M. and Mguez, B. Martn and Tiphaneau, P. and Wöppelmann, G.},
title = {Mitigating the effects of vertical land motion in tide gauge records using a state-of-the-art GPS velocity field},
journal = {Global and Planetary Change},
publisher = {Elsevier BV},
year = {2012},
volume = {98-99},
pages = {6--17},
url = {http://dx.doi.org/10.1016/j.gloplacha.2012.07.007},
doi = {10.1016/j.gloplacha.2012.07.007}
}
|
| Santamara-Gómez A, Marie-Noëlle B, Collilieux X and Wöppelmann G (2013), "Time-Correlated GPS Noise Dependency on Data Time Period", In International Association of Geodesy Symposia., nov, 2013. Vol. 138, pp. 119-124. Springer Science $mathplus Business Media. |
BibTeX:
@incollection{Santamaria_Gomez_2012,
author = {Santamara-Gómez, Alvaro and Marie-Noëlle, Bouin and Collilieux, Xavier and Wöppelmann, Guy},
title = {Time-Correlated GPS Noise Dependency on Data Time Period},
booktitle = {International Association of Geodesy Symposia},
publisher = {Springer Science $mathplus Business Media},
year = {2013},
volume = {138},
pages = {119--124},
url = {http://link.springer.com/10.1007/978-3-642-32998-219},
doi = {10.1007/978-3-642-32998-2{\_}19}
}
|
| Santamara-Gómez A, Watson C, Gravelle Mé, King M and Wöppelmann G (2015), "Levelling co-located GNSS and tide gauge stations using GNSS reflectometry", Journal of Geodesy., dec, 2015. Vol. 89(3), pp. 241-258. Springer Science $mathplus Business Media. |
| Abstract: The GNSS reflectometry technique provides geometric information on the environment surrounding the GNSS antenna including the vertical distance to a reflecting surface. We use sea-surface reflections of GPS signals, recorded as oscillations in signal-to-noise ratio (SNR), to estimate the GNSS to tide gauge (TG) levelling tie, and thus the ellipsoidal heights of the TG. We develop approaches to isolate SNR data dominated by sea-surface reflections and to remove SNR frequency changes caused by the dynamic sea surface. Comparison with in situ levelling at eight sites reveals mean differences at the centimetre level for satellites above 12 $($circ $) elevation, with four sites showing differences of 3 cm or smaller. These differences include errors in the in situ levelling, in the antenna calibration model and in the TG measurements, and so represent an upper bound on our technique’s error. Data sampling (1 or 30 s) does not significantly affect the results. We detect systematic errors at the decimetre level related to satellite elevations below 12 $($circ $) and to sea-surface height and also differences between results from the L1 and L2 GPS signals larger than 15 cm at two sites. These systematic errors remain unexplained; differences between GPS signals are attributed to receiver-dependent differences in the SNR measurements, while the elevation-dependent error is attributed to unmodelled phase effects such as those caused by tropospheric refraction and sea-surface roughness. Using our approach, we identify a levelling offset of 1.5 cm related to a TG sensor change, illustrating our technique’s value for TG reference monitoring. |
BibTeX:
@article{Santamaria_Gomez_2014,
author = {Santamara-Gómez, Alvaro and Watson, Christopher and Gravelle, Médéric and King, Matt and Wöppelmann, Guy},
title = {Levelling co-located GNSS and tide gauge stations using GNSS reflectometry},
journal = {Journal of Geodesy},
publisher = {Springer Science $mathplus Business Media},
year = {2015},
volume = {89},
number = {3},
pages = {241--258},
url = {http://dx.doi.org/10.1007/s00190-014-0784-y},
doi = {10.1007/s00190-014-0784-y}
}
|
| Sue C, Walpersdorf A, Sakic P, Rabin M and Champagnac J (2014), "Permanent GPS network around the bend of the Jura Arc : preliminary results", In EGU General Assembly Conference Abstracts., may, 2014. Vol. 16, pp. 11026.
[BibTeX] |
BibTeX:
@inproceedings{2014EGUGA..1611026S,
author = {Sue, Christian and Walpersdorf, Andrea and Sakic, Pierre and Rabin, Mickael and Champagnac, Jean},
title = {Permanent GPS network around the bend of the Jura Arc : preliminary results},
booktitle = {EGU General Assembly Conference Abstracts},
year = {2014},
volume = {16},
pages = {11026}
}
|
| Van Baelen J and Penide G (2009), "Study of water vapor vertical variability and possible cloud formation with a small network of GPS stations", Geophysical Research Letters., jan, 2009. Vol. 36(2), pp. n/a--n/a. Wiley-Blackwell. |
| Abstract: During a short experiment we have investigated the vertical variability of water vapor in the lower part of the atmosphere with the help of small network of GPS stations positioned on the eastern slopes of the Puy de Dôme in central France. We have found out that the urban layer exhibits somewhat constant water vapor content. In contrast, the major IWV variations arise in the upper troposphere level, in particular in the presence of westerly flows that bring elevated water vapor content over the mountain ridge. Finally, the transition layer situated between these lower and upper levels presents quite variable water vapor content, acting as a buffer zone for the boundary layer. Comparing two episodes of higher water vapor contents, one being associated with a sharp frontal passage, we have shown that the contrasted behavior of the different layers revealed the possible formation of clouds before the advent of rain. |
BibTeX:
@article{Van_Baelen_2009,
author = {Van Baelen, Joël and Penide, Guillaume},
title = {Study of water vapor vertical variability and possible cloud formation with a small network of GPS stations},
journal = {Geophysical Research Letters},
publisher = {Wiley-Blackwell},
year = {2009},
volume = {36},
number = {2},
pages = {n/a----n/a},
url = {http://dx.doi.org/10.1029/2008gl036148},
doi = {10.1029/2008GL036148}
}
|
| Van Baelen J, Reverdy M, Tridon F, Labbouz L, Dick G, Bender M and Hagen M (2011), "On the relationship between water vapour field evolution and the life cycle of precipitation systems", Quarterly Journal of the Royal Meteorological Society., jan, 2011. Vol. 137(SUPPL. 1), pp. 204-223. Wiley-Blackwell. |
| Abstract: In this work, we investigate the relationship between the structure and evolution (from initiation to decay) of precipitation systems, and the associated water vapour distributions during the COPS (Convective Orographically-induced Precipitation Study). This international field campaign took place over an area from the Vosges to the Black Forest Mountains, across the Rhine Valley, in summer 2007. In particular, we consider water vapour retrieval through GPS integrated water vapour 2D maps and 3D tomography, and compare these to precipitation systems observed with the ground-based C-band POLDIRAD weather radar. We have demonstrated the predominant role of water vapour as a precursor to convective initiation for local convective cell generation. Water vapour accumulation on the crest of the orography is associated with ridge convection, while water vapour passing over the mountain top and creating valley outflows generates lee-side convection, often triggered by a small hill positioned within or close to the valley exit, or by a local convergence with the water vapour field over the plain. We have also noted that frontal systems seem to develop preferentially where the largest amount of water vapour is available. Likewise, in the case of frontal systems, well-formed synoptic-scale storms are associated with high water vapour signatures, while weaker systems with embedded convection appear to trail high water vapour areas where the convective element is associated with local water vapour depletion. This latter aspect could be the signature of convective cloud formation, when water vapour is transferred into liquid water, before the onset of precipitation. Copyright © 2011 Royal Meteorological Society |
BibTeX:
@article{Van_Baelen_2011,
author = {Van Baelen, J. and Reverdy, M. and Tridon, F. and Labbouz, L. and Dick, G. and Bender, M. and Hagen, M.},
title = {On the relationship between water vapour field evolution and the life cycle of precipitation systems},
journal = {Quarterly Journal of the Royal Meteorological Society},
publisher = {Wiley-Blackwell},
year = {2011},
volume = {137},
number = {SUPPL. 1},
pages = {204--223},
url = {http://dx.doi.org/10.1002/qj.785},
doi = {10.1002/qj.785}
}
|
| Vigny C, Geiger A, Calais E, Chery J, Feigl K, Jouanne F, Walpersdorf A, Exertier P, Ferhat G, Nocquet J, Briole P, Charade O, Delacourt C, Duquenne F, Bouin M, Flouzat M, Morel L, Morin D, Baize S and Anzidei M (2005), "Western Alps Crustal Deformation Monitored by Repeated GPS Surveys", AGU Fall Meeting Abstracts., dec, 2005.
[BibTeX] |
BibTeX:
@article{2005AGUFM.G21B1277V,
author = {Vigny, C and Geiger, A and Calais, E and Chery, J and Feigl, K and Jouanne, F and Walpersdorf, A and Exertier, P and Ferhat, G and Nocquet, J and Briole, P and Charade, O and Delacourt, C and Duquenne, F and Bouin, M and Flouzat, M and Morel, L and Morin, D and Baize, S and Anzidei, M},
title = {Western Alps Crustal Deformation Monitored by Repeated GPS Surveys},
journal = {AGU Fall Meeting Abstracts},
year = {2005}
}
|
| Wöppelmann G, Letetrel C, Santamaria A, Bouin MN, Collilieux X, Altamimi Z, Williams SDP and Martin Miguez B (2009), "Rates of sea-level change over the past century in a geocentric reference frame", Geophysical Research Letters. Vol. 36(12) Wiley-Blackwell. |
| Abstract: The results from a carefully implemented GPS analysis, using a strategy adapted to determine accurate vertical station velocities, are presented. The stochastic properties of our globally distributed GPS position time series were inferred, allowing the computation of reliable velocity uncertainties. Most uncertainties were several times smaller than the 1–3 mm/yr global sea level change, and hence the vertical velocities could be applied to correct the long tide gauge records for land motion. The sea level trends obtained in the ITRF2005 reference frame are more consistent than in the ITRF2000 or corrected for Glacial-Isostatic Adjustment (GIA) model predictions, both on the global and the regional scale, leading to a reconciled global rate of geocentric sea level rise of 1.61 ± 0.19mm/yr over the past century in good agreement with the most recent estimates. |
BibTeX:
@article{Woppelmann_2009,
author = {Wöppelmann, G. and Letetrel, C. and Santamaria, A. and Bouin, M. N. and Collilieux, X. and Altamimi, Z. and Williams, S. D P and Martin Miguez, B.},
title = {Rates of sea-level change over the past century in a geocentric reference frame},
journal = {Geophysical Research Letters},
publisher = {Wiley-Blackwell},
year = {2009},
volume = {36},
number = {12},
url = {http://dx.doi.org/10.1029/2009gl038720},
doi = {10.1029/2009GL038720}
}
|
| Wöppelmann G, Marcos M, Coulomb A, Martn Mguez B, Bonnetain P, Boucher C, Gravelle M, Simon B and Tiphaneau P (2014), "Rescue of the historical sea level record of Marseille (France) from 1885 to 1988 and its extension back to 1849-1851", Journal of Geodesy., jun, 2014. Vol. 88(9), pp. 869-885. Springer Science $mathplus Business Media. |
BibTeX:
@article{Woppelmann_2014,
author = {Wöppelmann, G. and Marcos, M. and Coulomb, A. and Martn Mguez, B. and Bonnetain, P. and Boucher, C. and Gravelle, M. and Simon, B. and Tiphaneau, P.},
title = {Rescue of the historical sea level record of Marseille (France) from 1885 to 1988 and its extension back to 1849-1851},
journal = {Journal of Geodesy},
publisher = {Springer Science $mathplus Business Media},
year = {2014},
volume = {88},
number = {9},
pages = {869--885},
url = {http://dx.doi.org/10.1007/s00190-014-0728-6},
doi = {10.1007/s00190-014-0728-6}
}
|
| Walpersdorf A, Baize S, Calais E, Tregoning P and Nocquet JM (2006), "Deformation in the Jura Mountains (France): First results from semi-permanent GPS measurements", Earth and Planetary Science Letters., dec, 2006. Vol. 245(1-2), pp. 365-372. Elsevier BV. |
| Abstract: New GPS estimates of relative motion across the Jura Mountain Belt with respect to the Eurasian Plate indicate less than 1 mm/yr of convergence, considerably less than previous estimates. Velocity uncertainties have been evaluated by several methods and range from 0.2 to 0.5 mm/yr for the semi-permanent stations. The major, statistically-significant strain feature inferred by the Jura GPS measurements is along-arc extension, compatible with tectonic studies. That the detected deformation is small in magnitude highlights two important issues: previous estimates are over-stated and that the approach of using semi-permanent GPS installations is capable of detecting small tectonic signals. Using the upper bound as the rate of convergence, we estimate that this would generate an earthquake of magnitude 5-5.5 every 15 to 75 yr. © 2006 Elsevier B.V. All rights reserved. |
BibTeX:
@article{2003AGUFM.G21D0294B,
author = {Walpersdorf, Andrea and Baize, Stéphane and Calais, Eric and Tregoning, Paul and Nocquet, Jean Mathieu},
title = {Deformation in the Jura Mountains (France): First results from semi-permanent GPS measurements},
journal = {Earth and Planetary Science Letters},
publisher = {Elsevier BV},
year = {2006},
volume = {245},
number = {1-2},
pages = {365--372},
url = {http://dx.doi.org/10.1016/j.epsl.2006.02.037},
doi = {10.1016/j.epsl.2006.02.037}
}
|
| Walpersdorf A, Bock O, Doerflinger E, Masson F, van Baelen J, Somieski A and Bürki B (2004), "Data analysis of a dense GPS network operated during the ESCOMPTE campaign: First results", In Physics and Chemistry of the Earth. Vol. 29(2-3), pp. 201-211. |
| Abstract: The experiment GPS/H2O involving 17 GPS receivers has been operated for two weeks in June 2001 in a dense network around Marseille. This project was integrated into the ESCOMPTE campaign. This paper will focus on the GPS analysis in preparation of the tomographic inversion of GPS slant delays. As first results, GPS tropospheric parameters zenith delays and horizontal gradients have been extracted. For a first visualization of the humidity field overlying the network, zenith delays have been transformed into precipitable water. Successive humidity fields are presented for a period of sudden drop in humidity, indicating some spatial resolution in the small network. The time series of horizontal gradients evaluated at individual sites are compared to correlated zenith delay variations over the whole network (horizontal gradient of zenith delays), showing that in the small size network horizontal atmospheric structure is reflected by both types of parameters. To compare these two quantities, scaling of zenith delays due to different station altitudes was necessary. In this way, a GPS internal validation of the individual gradients by comparison with the horizontal gradient of zenith delays has been established. Differential features along transects across the network indicate a good spatial resolution of tropospheric phenomena, encouraging for the further tomographic exploitation of the data. Moreover, individual and zenith delay gradients weight differently atmospheric horizontal gradients occurring at different heights. This different sensitivity has been used for a first identification of a vertical atmospheric structure from GPS tropospheric delays, by observing an inclined frontal zone crossing the network. © 2004 Elsevier Ltd. All rights reserved. |
BibTeX:
@inproceedings{2004PCE....29..201W,
author = {Walpersdorf, A. and Bock, O. and Doerflinger, E. and Masson, F. and van Baelen, J. and Somieski, A. and Bürki, B.},
title = {Data analysis of a dense GPS network operated during the ESCOMPTE campaign: First results},
booktitle = {Physics and Chemistry of the Earth},
year = {2004},
volume = {29},
number = {2-3},
pages = {201--211},
doi = {10.1016/j.pce.2004.01.002}
}
|
| Walpersdorf A, Brenot H, Champollion C, Doerflinger E, Masson F, Ducrocq V, Anquetin S and Tabary P (2003), "GPS project for tropospheric water vapour observations related to torrential rain in the French Cevennes: Description and first results of the field experiment.", In EGS - AGU - EUG Joint Assembly., apr, 2003.
[BibTeX] |
BibTeX:
@inproceedings{2003EAEJA.....5074W,
author = {Walpersdorf, A and Brenot, H and Champollion, C and Doerflinger, E and Masson, F and Ducrocq, V and Anquetin, S and Tabary, P},
title = {GPS project for tropospheric water vapour observations related to torrential rain in the French Cevennes: Description and first results of the field experiment.},
booktitle = {EGS - AGU - EUG Joint Assembly},
year = {2003}
}
|
| Walpersdorf A, Manighetti I, Mousavi Z, Tavakoli F, Vergnolle M, Jadidi A, Hatzfeld D, Aghamohammadi A, Bigot A, Djamour Y, Nankali H and Sedighi M (2014), "Present-day kinematics and fault slip rates in eastern Iran, derived from 11 years of GPS data", Journal of Geophysical Research: Solid Earth., feb, 2014. Vol. 119(2), pp. 1359-1383. |
BibTeX:
@article{2014JGRB..119.1359W,
author = {Walpersdorf, A. and Manighetti, I. and Mousavi, Z. and Tavakoli, F. and Vergnolle, M. and Jadidi, A. and Hatzfeld, D. and Aghamohammadi, A. and Bigot, A. and Djamour, Y. and Nankali, H. and Sedighi, M.},
title = {Present-day kinematics and fault slip rates in eastern Iran, derived from 11 years of GPS data},
journal = {Journal of Geophysical Research: Solid Earth},
year = {2014},
volume = {119},
number = {2},
pages = {1359--1383},
doi = {10.1002/2013JB010620}
}
|
| Walpersdorf A, Sue C, Baize S, Cotte N, Bascou P, Beauval C, Collard P, Daniel G, Dyer H, Grasso JR, Hautecoeur O, Helmstetter A, Hok S, Langlais M, Menard G, Mousavi Z, Ponton F, Rizza M, Rolland L, Souami D, Thirard L, Vaudey P, Voisin C and Martinod J (2015), "Coherence between geodetic and seismic deformation in a context of slow tectonic activity (SW Alps, France)", Journal of Geodynamics. Vol. 85, pp. 58-65. Pergamon. |
| Abstract: A dense, local network of 30 geodetic markers covering a 50??60km2 area in the southwestern European Alps (Brian??on region) has been temporarily surveyed in 1996, 2006 and 2011 by GPS. The aim is to measure the current deformation in this seismically active area. The study zone is characterized by a majority of extensional and dextral focal mechanisms, along north-south to N160 oriented faults. The combined analysis of the three measurement campaigns over 15 years and up to 16 years of permanent GPS data from the French RENAG network now enables to assess horizontal velocities below 1mm/year within the local network. The long observation interval and the redundancy of the dense campaign network measurement help to constrain a significant local deformation pattern in the Brian??on region, yielding an average E-W extension of 16??11nanostrain/year. We compare the geodetic deformation field to the seismic deformation rate cumulated over 37 years, and obtain good coherencies both in amplitude and direction. Moreover, the horizontal deformation localized in the Brian??on region represents a major part of the Adriatic-European relative plate motion. However, the average uplift of the network in an extensional setting needs the presence of buoyancy forces in addition to plate tectonics. |
BibTeX:
@article{Walpersdorf2015,
author = {Walpersdorf, A. and Sue, C. and Baize, S. and Cotte, N. and Bascou, P. and Beauval, C. and Collard, P. and Daniel, G. and Dyer, H. and Grasso, J. R. and Hautecoeur, O. and Helmstetter, A. and Hok, S. and Langlais, M. and Menard, G. and Mousavi, Z. and Ponton, F. and Rizza, M. and Rolland, L. and Souami, D. and Thirard, L. and Vaudey, P. and Voisin, C. and Martinod, J.},
title = {Coherence between geodetic and seismic deformation in a context of slow tectonic activity (SW Alps, France)},
journal = {Journal of Geodynamics},
publisher = {Pergamon},
year = {2015},
volume = {85},
pages = {58--65},
url = {http://www.sciencedirect.com/science/article/pii/S0264370715000137$nhttp://linkinghub.elsevier.com/retrieve/pii/S0264370715000137},
doi = {10.1016/j.jog.2015.02.001}
}
|
| Walpersdorf a, Sue C, Baize S, Thirard L and Cotte N (2012), "Repeated GPS measurements spanning 15 years to study the extensional deformation regime in the inner southwestern Alps (Briançon region, France)", In EGU General Assembly Conference Abstracts. Vol. 14, pp. 9508.
[BibTeX] |
BibTeX:
@inproceedings{2012EGUGA..14.9508W,
author = {Walpersdorf, a and Sue, C and Baize, S and Thirard, L and Cotte, N},
editor = {Abbasi, A and Giesen, N},
title = {Repeated GPS measurements spanning 15 years to study the extensional deformation regime in the inner southwestern Alps (Briançon region, France)},
booktitle = {EGU General Assembly Conference Abstracts},
year = {2012},
volume = {14},
pages = {9508}
}
|
| Woodworth PL, Gravelle M, Marcos M, W??ppelmann G and Hughes CW (2015), "The status of measurement of the Mediterranean mean dynamic topography by geodetic techniques", Journal of Geodesy., may, 2015. Vol. 89(8), pp. 811-827. Springer Science $mathplus Business Media. |
BibTeX:
@article{Woodworth_2015,
author = {Woodworth, Philip L. and Gravelle, M??d??ric and Marcos, Marta and W??ppelmann, Guy and Hughes, Chris W.},
title = {The status of measurement of the Mediterranean mean dynamic topography by geodetic techniques},
journal = {Journal of Geodesy},
publisher = {Springer Science $mathplus Business Media},
year = {2015},
volume = {89},
number = {8},
pages = {811--827},
url = {http://dx.doi.org/10.1007/s00190-015-0817-1},
doi = {10.1007/s00190-015-0817-1}
}
|
| Wulfmeyer V, Behrendt A, Kottmeier C, Corsmeier U, Barthlott C, Craig GC, Hagen M, Althausen D, Aoshima F, Arpagaus M, Bauer HS, Bennett L, Blyth A, Brandau C, Champollion Cé, Crewell S, Dick G, Di Girolamo P, Dorninger M, Dufournet Y, Eigenmann R, Engelmann R, Flamant C, Foken T, Gorgas T, Grzeschik M, Handwerker J, Hauck C, Höller H, Junkermann W, Kalthoff N, Kiemle C, Klink S, König M, Krauss L, Long CN, Madonna F, Mobbs S, Neininger B, Pal S, Peters G, Pigeon G, Richard E, Rotach MW, Russchenberg H, Schwitalla T, Smith V, Steinacker R, Trentmann Jö, Turner DD, Van Baelen J, Vogt S, Volkert H, Weckwerth T, Wernli H, Wieser A and Wirth M (2011), "The Convective and Orographically-induced Precipitation Study (COPS): The scientific strategy, the field phase, and research highlights", Quarterly Journal of the Royal Meteorological Society., jan, 2011. Vol. 137(SUPPL. 1), pp. 3-30. Wiley-Blackwell. |
| Abstract: Within the framework of the international field campaign COPS (Convective and Orographically-induced Precipitation Study), a large suite of state-of-the-art meteorological instrumentation was operated, partially combined for the first time. This includes networks of in situ and remote-sensing systems such as the Global Positioning System as well as a synergy of multi-wavelength passive and active remote-sensing instruments such as advanced radar and lidar systems. The COPS field phase was performed from 01 June to 31 August 2007 in a low-mountain area in southwestern Germany/eastern France covering the Vosges mountains, the Rhine valley and the Black Forest mountains. The collected data set covers the entire evolution of convective precipitation events in complex terrain from their initiation, to their development and mature phase until their decay. Eighteen Intensive Observation Periods with 37 operation days and eight additional Special Observation Periods were performed, providing a comprehensive data set covering different forcing conditions. In this article, an overview of the COPS scientific strategy, the field phase, and its first accomplishments is given. Highlights of the campaign are illustrated with several measurement examples. It is demonstrated that COPS research provides new insight into key processes leading to convection initiation and to the modification of precipitation by orography, in the improvement of quantitative precipitation forecasting by the assimilation of new observations, and in the performance of ensembles of convection-permitting models in complex terrain. Copyright © 2010 Royal Meteorological Society |
BibTeX:
@article{Wulfmeyer_2011,
author = {Wulfmeyer, Volker and Behrendt, Andreas and Kottmeier, Christoph and Corsmeier, Ulrich and Barthlott, Christian and Craig, George C. and Hagen, Martin and Althausen, Dietrich and Aoshima, Fumiko and Arpagaus, Marco and Bauer, Hans Stefan and Bennett, Lindsay and Blyth, Alan and Brandau, Christine and Champollion, Cédric and Crewell, Susanne and Dick, Galina and Di Girolamo, Paolo and Dorninger, Manfred and Dufournet, Yann and Eigenmann, Rafael and Engelmann, Ronny and Flamant, Cyrille and Foken, Thomas and Gorgas, Theresa and Grzeschik, Matthias and Handwerker, Jan and Hauck, Christian and Höller, Hartmut and Junkermann, Wolfgang and Kalthoff, Norbert and Kiemle, Christoph and Klink, Stefan and König, Marianne and Krauss, Liane and Long, Charles N. and Madonna, Fabio and Mobbs, Stephen and Neininger, Bruno and Pal, Sandip and Peters, Gerhard and Pigeon, Grégoire and Richard, Evelyne and Rotach, Mathias W. and Russchenberg, Herman and Schwitalla, Thomas and Smith, Victoria and Steinacker, Reinhold and Trentmann, Jörg and Turner, David D. and Van Baelen, Joel and Vogt, Siegfried and Volkert, Hans and Weckwerth, Tammy and Wernli, Heini and Wieser, Andreas and Wirth, Martin},
title = {The Convective and Orographically-induced Precipitation Study (COPS): The scientific strategy, the field phase, and research highlights},
journal = {Quarterly Journal of the Royal Meteorological Society},
publisher = {Wiley-Blackwell},
year = {2011},
volume = {137},
number = {SUPPL. 1},
pages = {3--30},
url = {http://dx.doi.org/10.1002/qj.752},
doi = {10.1002/qj.752}
}
|
| Yan X, Ducrocq V, Jaubert G, Brousseau P, Poli P, Champollion C, Flamant C and Boniface K (2009), "The benefit of GPS zenith delay assimilation to high-resolution quantitative precipitation forecasts: A case-study from COPS IOP 9", Quarterly Journal of the Royal Meteorological Society., oct, 2009. Vol. 135(644), pp. 1788-1800. Wiley-Blackwell. |
BibTeX:
@article{Yan_2009,
author = {Yan, X. and Ducrocq, V. and Jaubert, G. and Brousseau, P. and Poli, P. and Champollion, C. and Flamant, C. and Boniface, K.},
title = {The benefit of GPS zenith delay assimilation to high-resolution quantitative precipitation forecasts: A case-study from COPS IOP 9},
journal = {Quarterly Journal of the Royal Meteorological Society},
publisher = {Wiley-Blackwell},
year = {2009},
volume = {135},
number = {644},
pages = {1788--1800},
url = {http://dx.doi.org/10.1002/qj.508},
doi = {10.1002/qj.508}
}
|
| Yan X, Ducrocq V, Poli P, Hakam M, Jaubert G and Walpersdorf A (2009), "Impact of GPS zenith delay assimilation on convective-scale prediction of Mediterranean heavy rainfall", Journal of Geophysical Research Atmospheres., feb, 2009. Vol. 114(3) Wiley-Blackwell. |
BibTeX:
@article{YanDucrocqPoliEtAl2009,
author = {Yan, X. and Ducrocq, V. and Poli, P. and Hakam, M. and Jaubert, G. and Walpersdorf, A.},
title = {Impact of GPS zenith delay assimilation on convective-scale prediction of Mediterranean heavy rainfall},
journal = {Journal of Geophysical Research Atmospheres},
publisher = {Wiley-Blackwell},
year = {2009},
volume = {114},
number = {3},
url = {http://dx.doi.org/10.1029/2008jd011036},
doi = {10.1029/2008JD011036}
}
|
| Yan X, Ducrocq V, Poli P, Jaubert G, Walpersdorf A, Fourier J and Maison G (2008), "Advances in Geosciences Mesoscale GPS Zenith Delay assimilation during a Mediterranean heavy precipitation event", Advances In Geosciences., jul, 2008. Vol. 17, pp. 71-77.
[BibTeX] |
BibTeX:
@article{2008AdG....17...71Y,
author = {Yan, X and Ducrocq, V and Poli, P and Jaubert, G and Walpersdorf, A and Fourier, Joseph and Maison, G},
title = {Advances in Geosciences Mesoscale GPS Zenith Delay assimilation during a Mediterranean heavy precipitation event},
journal = {Advances In Geosciences},
year = {2008},
volume = {17},
pages = {71--77}
}
|