Rapid bedrock uplift in the Antarctic Peninsula explained by viscoelastic response to recent ice unloading
Since 1995 several ice shelves in the Northern Antarctic Peninsula have collapsed and triggered ice-mass unloading, invoking a solid Earth response that has been recorded at continuous GPS (cGPS) stations. A previous attempt to model the observation of rapid uplift following the 2002 breakup of Lars...
Published in: | Earth and Planetary Science Letters |
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Main Authors: | , , , , , , , , |
Other Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2014
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-01011349 https://doi.org/10.1016/j.epsl.2014.04.019 |
id |
ftccsdartic:oai:HAL:hal-01011349v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Antarctic Peninsula Larsen B ice-mass loss viscoelastic uplift GPS upper mantle viscosity |
spellingShingle |
Antarctic Peninsula Larsen B ice-mass loss viscoelastic uplift GPS upper mantle viscosity Nield, G. A. Barletta, V. R. Bordoni, A. King, M. A. Whitehouse, P. L. Clarke, P. J. Domack, E. W. Scambos, T. A. Berthier, E. Rapid bedrock uplift in the Antarctic Peninsula explained by viscoelastic response to recent ice unloading |
topic_facet |
Antarctic Peninsula Larsen B ice-mass loss viscoelastic uplift GPS upper mantle viscosity |
description |
Since 1995 several ice shelves in the Northern Antarctic Peninsula have collapsed and triggered ice-mass unloading, invoking a solid Earth response that has been recorded at continuous GPS (cGPS) stations. A previous attempt to model the observation of rapid uplift following the 2002 breakup of Larsen B Ice Shelf was limited by incomplete knowledge of the pattern of ice unloading and possibly the assumption of an elastic-only mechanism. We make use of a new high resolution dataset of ice elevation change that captures ice-mass loss north of 66°S to first show that non-linear uplift of the Palmer cGPS station since 2002 cannot be explained by elastic deformation alone. We apply a viscoelastic model with linear Maxwell rheology to predict uplift since 1995 and test the fit to the Palmer cGPS time series, finding a well constrained upper mantle viscosity but less sensitivity to lithospheric thickness. We further constrain the best fitting Earth model by including six cGPS stations deployed after 2009 (the LARISSA network), with vertical velocities in the range 1.7 to 14.9 mm/yr. This results in a best fitting Earth model with lithospheric thickness of 100-140 km and upper mantle viscosity of View the MathML source6×1017-2×1018 Pas - much lower than previously suggested for this region. Combining the LARISSA time series with the Palmer cGPS time series offers a rare opportunity to study the time-evolution of the low-viscosity solid Earth response to a well-captured ice unloading event. |
author2 |
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) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Nield, G. A. Barletta, V. R. Bordoni, A. King, M. A. Whitehouse, P. L. Clarke, P. J. Domack, E. W. Scambos, T. A. Berthier, E. |
author_facet |
Nield, G. A. Barletta, V. R. Bordoni, A. King, M. A. Whitehouse, P. L. Clarke, P. J. Domack, E. W. Scambos, T. A. Berthier, E. |
author_sort |
Nield, G. A. |
title |
Rapid bedrock uplift in the Antarctic Peninsula explained by viscoelastic response to recent ice unloading |
title_short |
Rapid bedrock uplift in the Antarctic Peninsula explained by viscoelastic response to recent ice unloading |
title_full |
Rapid bedrock uplift in the Antarctic Peninsula explained by viscoelastic response to recent ice unloading |
title_fullStr |
Rapid bedrock uplift in the Antarctic Peninsula explained by viscoelastic response to recent ice unloading |
title_full_unstemmed |
Rapid bedrock uplift in the Antarctic Peninsula explained by viscoelastic response to recent ice unloading |
title_sort |
rapid bedrock uplift in the antarctic peninsula explained by viscoelastic response to recent ice unloading |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.archives-ouvertes.fr/hal-01011349 https://doi.org/10.1016/j.epsl.2014.04.019 |
geographic |
Antarctic The Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Shelf Ice Shelves |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Shelf Ice Shelves |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal.archives-ouvertes.fr/hal-01011349 Earth and Planetary Science Letters, Elsevier, 2014, 397, pp.32-41. ⟨10.1016/j.epsl.2014.04.019⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2014.04.019 hal-01011349 https://hal.archives-ouvertes.fr/hal-01011349 doi:10.1016/j.epsl.2014.04.019 |
op_doi |
https://doi.org/10.1016/j.epsl.2014.04.019 |
container_title |
Earth and Planetary Science Letters |
container_volume |
397 |
container_start_page |
32 |
op_container_end_page |
41 |
_version_ |
1766268040136097792 |
spelling |
ftccsdartic:oai:HAL:hal-01011349v1 2023-05-15T13:59:28+02:00 Rapid bedrock uplift in the Antarctic Peninsula explained by viscoelastic response to recent ice unloading Nield, G. A. Barletta, V. R. Bordoni, A. King, M. A. Whitehouse, P. L. Clarke, P. J. Domack, E. W. Scambos, T. A. Berthier, E. 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) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) 2014 https://hal.archives-ouvertes.fr/hal-01011349 https://doi.org/10.1016/j.epsl.2014.04.019 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2014.04.019 hal-01011349 https://hal.archives-ouvertes.fr/hal-01011349 doi:10.1016/j.epsl.2014.04.019 ISSN: 0012-821X Earth and Planetary Science Letters https://hal.archives-ouvertes.fr/hal-01011349 Earth and Planetary Science Letters, Elsevier, 2014, 397, pp.32-41. ⟨10.1016/j.epsl.2014.04.019⟩ Antarctic Peninsula Larsen B ice-mass loss viscoelastic uplift GPS upper mantle viscosity info:eu-repo/semantics/article Journal articles 2014 ftccsdartic https://doi.org/10.1016/j.epsl.2014.04.019 2021-10-24T13:17:21Z Since 1995 several ice shelves in the Northern Antarctic Peninsula have collapsed and triggered ice-mass unloading, invoking a solid Earth response that has been recorded at continuous GPS (cGPS) stations. A previous attempt to model the observation of rapid uplift following the 2002 breakup of Larsen B Ice Shelf was limited by incomplete knowledge of the pattern of ice unloading and possibly the assumption of an elastic-only mechanism. We make use of a new high resolution dataset of ice elevation change that captures ice-mass loss north of 66°S to first show that non-linear uplift of the Palmer cGPS station since 2002 cannot be explained by elastic deformation alone. We apply a viscoelastic model with linear Maxwell rheology to predict uplift since 1995 and test the fit to the Palmer cGPS time series, finding a well constrained upper mantle viscosity but less sensitivity to lithospheric thickness. We further constrain the best fitting Earth model by including six cGPS stations deployed after 2009 (the LARISSA network), with vertical velocities in the range 1.7 to 14.9 mm/yr. This results in a best fitting Earth model with lithospheric thickness of 100-140 km and upper mantle viscosity of View the MathML source6×1017-2×1018 Pas - much lower than previously suggested for this region. Combining the LARISSA time series with the Palmer cGPS time series offers a rare opportunity to study the time-evolution of the low-viscosity solid Earth response to a well-captured ice unloading event. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Shelf Ice Shelves Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic The Antarctic Antarctic Peninsula Earth and Planetary Science Letters 397 32 41 |