Relationship between glacial isostatic adjustment and gravity perturbations observed by GRACE
International audience The Gravity Recovery and Climate Experiment space gravity mission provides one of the principal means of estimating present-day mass loss occurring in polar regions. Extraction of the mass loss signal from the observed gravity changes is complicated by the need to first remove...
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Online Access: | https://doi.org/10.1029/2011GL048624 https://hal.archives-ouvertes.fr/hal-00967316/file/Purcell_et_al._-_2011_-_Relationship_between_glacial_isostatic_adjustment_.pdf https://hal.archives-ouvertes.fr/hal-00967316 |
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fttriple:oai:gotriple.eu:10670/1.ed1taz 2023-05-15T13:41:27+02:00 Relationship between glacial isostatic adjustment and gravity perturbations observed by GRACE Purcell, Anthony Dehecq, Amaury Tregoning, Paul Potter, Emma-Kate Mcclusky, Simon Lambeck, Kurt Research School of Earth Sciences Canberra (RSES) Australian National University (ANU) 2011-09-21 https://doi.org/10.1029/2011GL048624 https://hal.archives-ouvertes.fr/hal-00967316/file/Purcell_et_al._-_2011_-_Relationship_between_glacial_isostatic_adjustment_.pdf https://hal.archives-ouvertes.fr/hal-00967316 en eng HAL CCSD American Geophysical Union hal-00967316 doi:10.1029/2011GL048624 10670/1.ed1taz https://hal.archives-ouvertes.fr/hal-00967316/file/Purcell_et_al._-_2011_-_Relationship_between_glacial_isostatic_adjustment_.pdf https://hal.archives-ouvertes.fr/hal-00967316 other Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters Geophysical Research Letters, American Geophysical Union, 2011, 38 (18), pp.28. ⟨10.1029/2011GL048624⟩ GRACE glacio-isostatic adjustment uplift estimates geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2011 fttriple https://doi.org/10.1029/2011GL048624 2023-01-22T17:45:47Z International audience The Gravity Recovery and Climate Experiment space gravity mission provides one of the principal means of estimating present-day mass loss occurring in polar regions. Extraction of the mass loss signal from the observed gravity changes is complicated by the need to first remove the signal of ongoing glacial isostatic adjustment (GIA) since the Last Glacial Maximum. This can be problematic in regions such as Antarctica where the GIA models are poorly constrained by observation and their accuracy is not well known. We present a new methodology that permits the GIA component to be represented mathematically by a simple, linear expression of the ratio of viscoelastic Love numbers that is valid for a broad range of Earth and ice-load models. The expression is shown to reproduce rigorous computations of surface uplift rates to within 0.3 mm/yr, thus providing a means of inverting simultaneously for present-day mass loss and ongoing GIA with all the accuracy of a fully detailed forward model. Article in Journal/Newspaper Antarc* Antarctica Unknown Geophysical Research Letters 38 18 n/a n/a |
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English |
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GRACE glacio-isostatic adjustment uplift estimates geo envir |
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GRACE glacio-isostatic adjustment uplift estimates geo envir Purcell, Anthony Dehecq, Amaury Tregoning, Paul Potter, Emma-Kate Mcclusky, Simon Lambeck, Kurt Relationship between glacial isostatic adjustment and gravity perturbations observed by GRACE |
topic_facet |
GRACE glacio-isostatic adjustment uplift estimates geo envir |
description |
International audience The Gravity Recovery and Climate Experiment space gravity mission provides one of the principal means of estimating present-day mass loss occurring in polar regions. Extraction of the mass loss signal from the observed gravity changes is complicated by the need to first remove the signal of ongoing glacial isostatic adjustment (GIA) since the Last Glacial Maximum. This can be problematic in regions such as Antarctica where the GIA models are poorly constrained by observation and their accuracy is not well known. We present a new methodology that permits the GIA component to be represented mathematically by a simple, linear expression of the ratio of viscoelastic Love numbers that is valid for a broad range of Earth and ice-load models. The expression is shown to reproduce rigorous computations of surface uplift rates to within 0.3 mm/yr, thus providing a means of inverting simultaneously for present-day mass loss and ongoing GIA with all the accuracy of a fully detailed forward model. |
author2 |
Research School of Earth Sciences Canberra (RSES) Australian National University (ANU) |
format |
Article in Journal/Newspaper |
author |
Purcell, Anthony Dehecq, Amaury Tregoning, Paul Potter, Emma-Kate Mcclusky, Simon Lambeck, Kurt |
author_facet |
Purcell, Anthony Dehecq, Amaury Tregoning, Paul Potter, Emma-Kate Mcclusky, Simon Lambeck, Kurt |
author_sort |
Purcell, Anthony |
title |
Relationship between glacial isostatic adjustment and gravity perturbations observed by GRACE |
title_short |
Relationship between glacial isostatic adjustment and gravity perturbations observed by GRACE |
title_full |
Relationship between glacial isostatic adjustment and gravity perturbations observed by GRACE |
title_fullStr |
Relationship between glacial isostatic adjustment and gravity perturbations observed by GRACE |
title_full_unstemmed |
Relationship between glacial isostatic adjustment and gravity perturbations observed by GRACE |
title_sort |
relationship between glacial isostatic adjustment and gravity perturbations observed by grace |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://doi.org/10.1029/2011GL048624 https://hal.archives-ouvertes.fr/hal-00967316/file/Purcell_et_al._-_2011_-_Relationship_between_glacial_isostatic_adjustment_.pdf https://hal.archives-ouvertes.fr/hal-00967316 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters Geophysical Research Letters, American Geophysical Union, 2011, 38 (18), pp.28. ⟨10.1029/2011GL048624⟩ |
op_relation |
hal-00967316 doi:10.1029/2011GL048624 10670/1.ed1taz https://hal.archives-ouvertes.fr/hal-00967316/file/Purcell_et_al._-_2011_-_Relationship_between_glacial_isostatic_adjustment_.pdf https://hal.archives-ouvertes.fr/hal-00967316 |
op_rights |
other |
op_doi |
https://doi.org/10.1029/2011GL048624 |
container_title |
Geophysical Research Letters |
container_volume |
38 |
container_issue |
18 |
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n/a |
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n/a |
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1766151040931987456 |