GPS data processing in the Antarctic: crustal movements, postglacial rebound and reference systems
The subject of this thesis is the processing of GPS data from the permanent stations in Antarctica, for the assessment of vertical and horizontal motions induced by glacial rebound. An accurate knowledge of the current deformations provides information about the validity of the late Pleistocene degl...
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ftobservparis:oai:HAL:tel-02071396v1 2024-05-19T07:31:05+00:00 GPS data processing in the Antarctic: crustal movements, postglacial rebound and reference systems Traitement de données GPS en Antarctique: mouvements crustaux, rebond post-glaciaire et systèmes de référence Bouin, Marie-Noelle Observatoire de Paris Université Paris Sciences et Lettres (PSL) LAboratoire de Recherche en Géodésie (LAREG) Ecole nationale des sciences géographiques (ENSG) Institut géographique national IGN (IGN)-Institut géographique national IGN (IGN) Claude Boucher C. Vigny (co-directeur) 1999-10-14 https://hal.science/tel-02071396 https://hal.science/tel-02071396/document https://hal.science/tel-02071396/file/OBSPM_7613.pdf fr fre HAL CCSD tel-02071396 https://hal.science/tel-02071396 https://hal.science/tel-02071396/document https://hal.science/tel-02071396/file/OBSPM_7613.pdf info:eu-repo/semantics/OpenAccess https://hal.science/tel-02071396 Géophysique [physics.geo-ph]. Observatoire de Paris, 1999. Français. ⟨NNT : ⟩ astronomy GPS Astronomie géodésique Isostasie Tectonique des plaques [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics info:eu-repo/semantics/doctoralThesis Theses 1999 ftobservparis 2024-04-25T01:36:24Z The subject of this thesis is the processing of GPS data from the permanent stations in Antarctica, for the assessment of vertical and horizontal motions induced by glacial rebound. An accurate knowledge of the current deformations provides information about the validity of the late Pleistocene deglaciation models and the present-day Antarctic ice-sheet behavior. This could largely affect global sea level change. We have analysed 4 years of continuous IGS data from the stations in and around Antarctica. We have improved the processing method in order to take into account the specifities of GPS data analysis in Antarctica, and obtained station position time series, from which we derive significant horizontal and vertical velocities. The horizontal velocities show a very good agreement with a rigide plate motion, which is slightly different from the Nuvell predicted motion, but very coherent with the recent results obtained by Heflin (1999) for the Australian plate motion. The particular case of the Dumont station was good agreement with the recent results obtained investigated to estimate the influence of the March 1998 Balleny Islands earthquake, in relatively good agreement with the dislocation models. From the vertical trends, we detect a global uplift of the whole Antarctic continent, at about 1 cm/yr, consistent with the upper limit of the vicous model predictions. Based upon O’Higgins observations, we see that the Peninsula is affected by a higher rate of 2.5 cm/yr, including a purely elastic part, which reflects the present-day increase of the melting rate over the West Antarctica, confirmed by the glaciological and geodetic observations. The seasonal variations detected for this station on the vertical component haven’t found their explanation yet. Le sujet de cette thèse est l'utilisation des données GPS des stations permanentes antarctiques pour la mesure de mouvements verticaux et horizontaux liés au rebond glaciaire. Les constantes de temps de l'isostasie terrestre sont telles que la croute ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctica Antarctique* Balleny Islands Ice Sheet West Antarctica Archive de l'Observatoire de Paris (HAL) |
institution |
Open Polar |
collection |
Archive de l'Observatoire de Paris (HAL) |
op_collection_id |
ftobservparis |
language |
French |
topic |
astronomy GPS Astronomie géodésique Isostasie Tectonique des plaques [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics |
spellingShingle |
astronomy GPS Astronomie géodésique Isostasie Tectonique des plaques [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics Bouin, Marie-Noelle GPS data processing in the Antarctic: crustal movements, postglacial rebound and reference systems |
topic_facet |
astronomy GPS Astronomie géodésique Isostasie Tectonique des plaques [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics |
description |
The subject of this thesis is the processing of GPS data from the permanent stations in Antarctica, for the assessment of vertical and horizontal motions induced by glacial rebound. An accurate knowledge of the current deformations provides information about the validity of the late Pleistocene deglaciation models and the present-day Antarctic ice-sheet behavior. This could largely affect global sea level change. We have analysed 4 years of continuous IGS data from the stations in and around Antarctica. We have improved the processing method in order to take into account the specifities of GPS data analysis in Antarctica, and obtained station position time series, from which we derive significant horizontal and vertical velocities. The horizontal velocities show a very good agreement with a rigide plate motion, which is slightly different from the Nuvell predicted motion, but very coherent with the recent results obtained by Heflin (1999) for the Australian plate motion. The particular case of the Dumont station was good agreement with the recent results obtained investigated to estimate the influence of the March 1998 Balleny Islands earthquake, in relatively good agreement with the dislocation models. From the vertical trends, we detect a global uplift of the whole Antarctic continent, at about 1 cm/yr, consistent with the upper limit of the vicous model predictions. Based upon O’Higgins observations, we see that the Peninsula is affected by a higher rate of 2.5 cm/yr, including a purely elastic part, which reflects the present-day increase of the melting rate over the West Antarctica, confirmed by the glaciological and geodetic observations. The seasonal variations detected for this station on the vertical component haven’t found their explanation yet. Le sujet de cette thèse est l'utilisation des données GPS des stations permanentes antarctiques pour la mesure de mouvements verticaux et horizontaux liés au rebond glaciaire. Les constantes de temps de l'isostasie terrestre sont telles que la croute ... |
author2 |
Observatoire de Paris Université Paris Sciences et Lettres (PSL) LAboratoire de Recherche en Géodésie (LAREG) Ecole nationale des sciences géographiques (ENSG) Institut géographique national IGN (IGN)-Institut géographique national IGN (IGN) Claude Boucher C. Vigny (co-directeur) |
format |
Doctoral or Postdoctoral Thesis |
author |
Bouin, Marie-Noelle |
author_facet |
Bouin, Marie-Noelle |
author_sort |
Bouin, Marie-Noelle |
title |
GPS data processing in the Antarctic: crustal movements, postglacial rebound and reference systems |
title_short |
GPS data processing in the Antarctic: crustal movements, postglacial rebound and reference systems |
title_full |
GPS data processing in the Antarctic: crustal movements, postglacial rebound and reference systems |
title_fullStr |
GPS data processing in the Antarctic: crustal movements, postglacial rebound and reference systems |
title_full_unstemmed |
GPS data processing in the Antarctic: crustal movements, postglacial rebound and reference systems |
title_sort |
gps data processing in the antarctic: crustal movements, postglacial rebound and reference systems |
publisher |
HAL CCSD |
publishDate |
1999 |
url |
https://hal.science/tel-02071396 https://hal.science/tel-02071396/document https://hal.science/tel-02071396/file/OBSPM_7613.pdf |
genre |
Antarc* Antarctic Antarctica Antarctique* Balleny Islands Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Antarctique* Balleny Islands Ice Sheet West Antarctica |
op_source |
https://hal.science/tel-02071396 Géophysique [physics.geo-ph]. Observatoire de Paris, 1999. Français. ⟨NNT : ⟩ |
op_relation |
tel-02071396 https://hal.science/tel-02071396 https://hal.science/tel-02071396/document https://hal.science/tel-02071396/file/OBSPM_7613.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1799468928577044480 |