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Auteur Martine Amalvict |
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Affiner la recherche Interroger des sources externesIsostatic stability of the East Antarctic station Dumont d'Urville from long-term geodetic observations and geophysical models / Martine Amalvict in Polar research, vol 28 n° 2 (August 2009)
Titre : Isostatic stability of the East Antarctic station Dumont d'Urville from long-term geodetic observations and geophysical models Type de document : Article/Communication Auteurs : Martine Amalvict, Auteur ; Pascal Willis Année de publication : 2009 Article en page(s) : pp 193 - 202 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] Antarctique
[Termes IGN] coordonnées GPS
[Termes IGN] déformation verticale de la croute terrestre
[Termes IGN] données géophysiques
[Termes IGN] rebond post-glaciaireRésumé : (auteur) Geodetic measurements of the vertical crustal displacement collocated with absolute gravity changes provide a discriminatory measurement of present-day glacial changes, versus more deeply seated rock motions caused by glacial isostatic adjustment (GIA). At the East Antarctic station of Dumont d'Urville, we compare the displacements derived from continuous DORIS (1993.0–2006.0) and Global Positioning System (GPS) (1999.0–2005.7) data, and observed changes in absolute gravity (2000–2006), with the predicted vertical displacement and change in gravity from GIA modelling. The geodetic results have mutual self-consistency, suggest station stability and provide upper bounds on both GIA and secular ice mass changes. The GIA models tend to predict amplitudes of rock motion larger than those observed, and we conclude that this part of Antarctica is probably experiencing a slight gain in ice mass, in contrast to West Antarctica. Numéro de notice : A2009-579 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Article DOI : 10.1111/j.1751-8369.2008.00091.x En ligne : http://doi.org/10.1111/j.1751-8369.2008.00091.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=88648
in Polar research > vol 28 n° 2 (August 2009) . - pp 193 - 202[article]
Titre : Multi-technique monitoring of ocean tide loading in Northern France Titre original : Campagne multi-technique d’étude de la charge océanique dans le Nord de la France Type de document : Article/Communication Auteurs : Muriel Llubes, Auteur ; Nicolas Florsch, Auteur ; Jean-Paul Boy, Auteur ; Martine Amalvict, Auteur ; Pascal Bonnefond, Auteur ; Marie-Noëlle Bouin Année de publication : 2008 Article en page(s) : pp 379 - 389 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] données GPS
[Termes IGN] surcharge océaniqueRésumé : (auteur) We have organised afield study of ocean tide loading in the northwestern part of France, where tidal amplitudes are known to be among the highest in the world. GPS and gravimetric techniques have already proved their capability to measure such weak and high-frequency signals. In this study, these classical observations are complemented with less usual techniques, such as tiltmeter and Satellite Laser Ranging (SLR) measurements. We present here the preliminary results for a common period of observations spanning from 12–19 May 2004. Additional measurements from the French Transportable Laser Ranging Station (FTLRS) were available during September and October 2004. Observation residuals are computed as the difference between the observed and the predicted time signals. We obtain small RMS residuals for GPS measurements (2.5/3.1/4.5 mm for the eastward, northward and upward components), for absolute and relative gravimetry (9 nm/s2 and 13 nm/s2) and for tiltmeters (0.05 μrad for EW component). We also fit the amplitude of the main M2 tidal constituent to FTLRS observations and we find a value of 3.731 cm, which is comparable to the theoretical value. Numéro de notice : A2010-699 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.crte.2008.03.005 Date de publication en ligne : 15/06/2008 En ligne : https://doi.org/10.1016/j.crte.2008.03.005 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=103435
in Comptes rendus : Géoscience > vol 340 n° 6 (June 2010) . - pp 379 - 389[article]Rapport Quadriennal 2003-2006 [du] CNFGG, ch. French activities in ground gravimetry during the period 2003-2006 / Martine Amalvict (2007)
contenu dans Rapport Quadriennal 2003-2006 [du] CNFGG [à la] 24e assemblée générale de l'Union Géodésique et Géophysique Internationale / D. Schertzer (2007)
Titre de série : Rapport Quadriennal 2003-2006 [du] CNFGG, ch Titre : French activities in ground gravimetry during the period 2003-2006 Type de document : Chapitre/Contribution Auteurs : Martine Amalvict, Auteur ; R. Bayer, Auteur ; Sylvain Bonvalot, Auteur ; N. Debeglia, Auteur ; Michel Diament Editeur : Paris : Ecole Nationale des Ponts et Chaussées ENPC Année de publication : 2007 Conférence : IUGG 2007, 24th general assembly UGGI 02/07/2007 13/07/2007 Pérouse Italie Importance : pp 65 - 96 Langues : Anglais (eng) Numéro de notice : H2007-007 Affiliation des auteurs : IGN+Ext (1940-2011) Nature : Chapître / contribution DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102819 Documents numériques
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Titre : Status of DORIS Stations in Antarctica for Precise Geodesy Type de document : Article/Communication Auteurs : Martine Amalvict, Auteur ; Pascal Willis Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2006 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 130 Conférence : IAG 2005, IAG Symposium IAG conference Dynamic Planet - Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools 22/08/2005 26/08/2005 Cairns Australie Proceedings Springer Importance : pp 94 - 102 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] Adélie, Terre
[Termes IGN] Antarctique
[Termes IGN] données DORIS
[Termes IGN] données GPS
[Termes IGN] données ITGB
[Termes IGN] gravimètre absolu
[Termes IGN] interférométrie à très grande base
[Termes IGN] levé gravimétrique
[Termes IGN] vitesse de déplacementRésumé : (auteur) Polar regions and especially Antarctica are nowadays recognised as exerting a major control upon the global Mean Sea Level (MSL) directly linked to climate changes. Monitoring and understanding the geodynamical behaviour of these regions is then of critical importance. The long-term displacement (or velocity) of reference sites helps constraining the ice sheet evolution prediction models. Several geodetic space techniques, such as GPS, observe displacements of such reference sites. In Antarctica, in addition to numerous GPS stations, four DORIS stations are permanently operating: Belgrano, Rothera, Syowa, Terre Adélie. In addition to the permanent DORIS stations, episodic DORIS campaigns took also place at Dome C / Concordia and on Sorsdal and Lambert glaciers. In this paper, we first present general information concerning the stations and the campaigns (exact location, period of measurements, etc). We then discuss the solutions obtained by different analysis centres (when available) for all DORIS stations in the Antarctic region. In particular, we use several ITRFs (from the early ITRF96 to ITRF2000) to see their impact on the derived velocities in Antarctica. An emphasis is given to the investigation and possible explanation of differences observed between each solution. Finally, we compare at these stations, the results of DORIS observations to the solutions from other geodetic techniques (GPS, VLBI) and to the results of repeated absolute gravity measurements (when available). Numéro de notice : C2005-042 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-540-49350-1_17 En ligne : https://doi.org/10.1007/978-3-540-49350-1_17 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102723
