Two independent methods for mapping the grounding line of an outlet glacier - an example from the Astrolabe Glacier, Terre Adélie, Antarctica
The grounding line is a key element of coastal outlet glaciers, acting on their dynamics. Accurately knowing its position is fundamental for both modelling the glacier dynamics and establishing a benchmark for later change detection. Here we map the grounding line of the Astrolabe Glacier in East An...
Published in: | The Cryosphere |
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Main Authors: | , , , , , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2014
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Online Access: | https://hal.science/hal-01011577 https://hal.science/hal-01011577/document https://hal.science/hal-01011577/file/tcd-7-3969-2013.pdf https://doi.org/10.5194/tc-8-1331-2014 |
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Open Polar |
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HAL Univ-Eiffel (Université Gustave Eiffel) |
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ftuniveiffel |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Le Meur, E. Sacchettini, M. Garambois, S. Berthier, E. Drouet, A. S. Durand, Geoffroy Young, D. A. Greenbaum, J. S. Holt, J. W. Blankenship, D.D. Rignot, E. Mouginot, J. Gim, Y. Kirchner, D. de Fleurian, B. Gagliardini, O. Gillet-Chaulet, F. Two independent methods for mapping the grounding line of an outlet glacier - an example from the Astrolabe Glacier, Terre Adélie, Antarctica |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
The grounding line is a key element of coastal outlet glaciers, acting on their dynamics. Accurately knowing its position is fundamental for both modelling the glacier dynamics and establishing a benchmark for later change detection. Here we map the grounding line of the Astrolabe Glacier in East Antarctica (66°41' S, 140°05' E), using both hydrostatic and tidal methods. The first method is based on new surface and ice thickness data from which the line of buoyant floatation is found. The second method uses kinematic GPS measurements of the tidal response of the ice surface. By detecting the transitions where the ice starts to move vertically in response to the tidal forcing we determine control points for the grounding line position along GPS profiles. Employing a two-dimensional elastic plate model, we compute the rigid short-term behaviour of the ice plate and estimate the correction required to compare the kinematic GPS control points with the previously determined line of floatation. These two approaches show consistency and lead us to propose a grounding line for the Astrolabe Glacier that significantly deviates from the lines obtained so far from satellite imagery. |
author2 |
Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut des Sciences de la Terre (ISTerre) Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Cryosphère satelittaire (CRYO) Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) Institute for Geophysics University of Texas at Dallas Richardson (UT Dallas) Department of Earth System Science Irvine (ESS) University of California Irvine (UC Irvine) University of California (UC)-University of California (UC) Jet Propulsion Laboratory (JPL) NASA-California Institute of Technology (CALTECH) Department of Physics and Astronomy Iowa City University of Iowa Iowa City |
format |
Article in Journal/Newspaper |
author |
Le Meur, E. Sacchettini, M. Garambois, S. Berthier, E. Drouet, A. S. Durand, Geoffroy Young, D. A. Greenbaum, J. S. Holt, J. W. Blankenship, D.D. Rignot, E. Mouginot, J. Gim, Y. Kirchner, D. de Fleurian, B. Gagliardini, O. Gillet-Chaulet, F. |
author_facet |
Le Meur, E. Sacchettini, M. Garambois, S. Berthier, E. Drouet, A. S. Durand, Geoffroy Young, D. A. Greenbaum, J. S. Holt, J. W. Blankenship, D.D. Rignot, E. Mouginot, J. Gim, Y. Kirchner, D. de Fleurian, B. Gagliardini, O. Gillet-Chaulet, F. |
author_sort |
Le Meur, E. |
title |
Two independent methods for mapping the grounding line of an outlet glacier - an example from the Astrolabe Glacier, Terre Adélie, Antarctica |
title_short |
Two independent methods for mapping the grounding line of an outlet glacier - an example from the Astrolabe Glacier, Terre Adélie, Antarctica |
title_full |
Two independent methods for mapping the grounding line of an outlet glacier - an example from the Astrolabe Glacier, Terre Adélie, Antarctica |
title_fullStr |
Two independent methods for mapping the grounding line of an outlet glacier - an example from the Astrolabe Glacier, Terre Adélie, Antarctica |
title_full_unstemmed |
Two independent methods for mapping the grounding line of an outlet glacier - an example from the Astrolabe Glacier, Terre Adélie, Antarctica |
title_sort |
two independent methods for mapping the grounding line of an outlet glacier - an example from the astrolabe glacier, terre adélie, antarctica |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-01011577 https://hal.science/hal-01011577/document https://hal.science/hal-01011577/file/tcd-7-3969-2013.pdf https://doi.org/10.5194/tc-8-1331-2014 |
long_lat |
ENVELOPE(140.000,140.000,-66.733,-66.733) ENVELOPE(139.917,139.917,-66.750,-66.750) ENVELOPE(139.000,139.000,-67.000,-67.000) ENVELOPE(138.991,138.991,-59.999,-59.999) |
geographic |
Astrolabe Astrolabe Glacier East Antarctica Terre Adélie Terre-Adélie |
geographic_facet |
Astrolabe Astrolabe Glacier East Antarctica Terre Adélie Terre-Adélie |
genre |
Antarc* Antarctica Astrolabe Glacier East Antarctica The Cryosphere |
genre_facet |
Antarc* Antarctica Astrolabe Glacier East Antarctica The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.science/hal-01011577 The Cryosphere, 2014, 8 (4), pp.1331-1346. ⟨10.5194/tc-8-1331-2014⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-8-1331-2014 hal-01011577 https://hal.science/hal-01011577 https://hal.science/hal-01011577/document https://hal.science/hal-01011577/file/tcd-7-3969-2013.pdf doi:10.5194/tc-8-1331-2014 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-8-1331-2014 |
container_title |
The Cryosphere |
container_volume |
8 |
container_issue |
4 |
container_start_page |
1331 |
op_container_end_page |
1346 |
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1766256635612758016 |
spelling |
ftuniveiffel:oai:HAL:hal-01011577v1 2023-05-15T13:52:21+02:00 Two independent methods for mapping the grounding line of an outlet glacier - an example from the Astrolabe Glacier, Terre Adélie, Antarctica Le Meur, E. Sacchettini, M. Garambois, S. Berthier, E. Drouet, A. S. Durand, Geoffroy Young, D. A. Greenbaum, J. S. Holt, J. W. Blankenship, D.D. Rignot, E. Mouginot, J. Gim, Y. Kirchner, D. de Fleurian, B. Gagliardini, O. Gillet-Chaulet, F. Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut des Sciences de la Terre (ISTerre) Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Cryosphère satelittaire (CRYO) Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) Institute for Geophysics University of Texas at Dallas Richardson (UT Dallas) Department of Earth System Science Irvine (ESS) University of California Irvine (UC Irvine) University of California (UC)-University of California (UC) Jet Propulsion Laboratory (JPL) NASA-California Institute of Technology (CALTECH) Department of Physics and Astronomy Iowa City University of Iowa Iowa City 2014 https://hal.science/hal-01011577 https://hal.science/hal-01011577/document https://hal.science/hal-01011577/file/tcd-7-3969-2013.pdf https://doi.org/10.5194/tc-8-1331-2014 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-8-1331-2014 hal-01011577 https://hal.science/hal-01011577 https://hal.science/hal-01011577/document https://hal.science/hal-01011577/file/tcd-7-3969-2013.pdf doi:10.5194/tc-8-1331-2014 info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.science/hal-01011577 The Cryosphere, 2014, 8 (4), pp.1331-1346. ⟨10.5194/tc-8-1331-2014⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2014 ftuniveiffel https://doi.org/10.5194/tc-8-1331-2014 2023-03-25T22:13:03Z The grounding line is a key element of coastal outlet glaciers, acting on their dynamics. Accurately knowing its position is fundamental for both modelling the glacier dynamics and establishing a benchmark for later change detection. Here we map the grounding line of the Astrolabe Glacier in East Antarctica (66°41' S, 140°05' E), using both hydrostatic and tidal methods. The first method is based on new surface and ice thickness data from which the line of buoyant floatation is found. The second method uses kinematic GPS measurements of the tidal response of the ice surface. By detecting the transitions where the ice starts to move vertically in response to the tidal forcing we determine control points for the grounding line position along GPS profiles. Employing a two-dimensional elastic plate model, we compute the rigid short-term behaviour of the ice plate and estimate the correction required to compare the kinematic GPS control points with the previously determined line of floatation. These two approaches show consistency and lead us to propose a grounding line for the Astrolabe Glacier that significantly deviates from the lines obtained so far from satellite imagery. Article in Journal/Newspaper Antarc* Antarctica Astrolabe Glacier East Antarctica The Cryosphere HAL Univ-Eiffel (Université Gustave Eiffel) Astrolabe ENVELOPE(140.000,140.000,-66.733,-66.733) Astrolabe Glacier ENVELOPE(139.917,139.917,-66.750,-66.750) East Antarctica Terre Adélie ENVELOPE(139.000,139.000,-67.000,-67.000) Terre-Adélie ENVELOPE(138.991,138.991,-59.999,-59.999) The Cryosphere 8 4 1331 1346 |