Exploring the uncertainty in GRACE estimates of the mass redistributions at the Earth surface: implications for the global water and sea level budgets
International audience Observations from the Gravity Recovery and Climate Experiment (GRACE) satellite missionprovide quantitative estimates of the global water budget components. However, these estimatesare uncertain as they show discrepancies when different parameters are used in the processing of...
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Online Access: | https://hal.science/hal-01952652 https://hal.science/hal-01952652/document https://hal.science/hal-01952652/file/ggy293.pdf https://doi.org/10.1093/gji/ggy293 |
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ftutoulouse3hal:oai:HAL:hal-01952652v1 2024-04-21T07:46:22+00:00 Exploring the uncertainty in GRACE estimates of the mass redistributions at the Earth surface: implications for the global water and sea level budgets Blazquez, A Meyssignac, B. Lemoine, Jm Berthier, Etienne Ribes, A Cazenave, A. Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-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) Géosciences Environnement Toulouse (GET) Météo-France 2018-10-01 https://hal.science/hal-01952652 https://hal.science/hal-01952652/document https://hal.science/hal-01952652/file/ggy293.pdf https://doi.org/10.1093/gji/ggy293 en eng HAL CCSD Oxford University Press (OUP) info:eu-repo/semantics/altIdentifier/doi/10.1093/gji/ggy293 hal-01952652 https://hal.science/hal-01952652 https://hal.science/hal-01952652/document https://hal.science/hal-01952652/file/ggy293.pdf doi:10.1093/gji/ggy293 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal.science/hal-01952652 Geophysical Journal International, 2018, 215 (1), pp.415-430. ⟨10.1093/gji/ggy293⟩ Global change from geodesy Satellite geodesy Sea level change Time variablegravity [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2018 ftutoulouse3hal https://doi.org/10.1093/gji/ggy293 2024-03-28T01:13:21Z International audience Observations from the Gravity Recovery and Climate Experiment (GRACE) satellite missionprovide quantitative estimates of the global water budget components. However, these estimatesare uncertain as they show discrepancies when different parameters are used in the processing ofthe GRACE data. We examine trends in ocean mass, ice loss from Antarctica, Greenland, arcticislands and trends in water storage over land and glaciers from GRACE data (2005–2015) andexplore the associated uncertainty. We consider variations in six different GRACE processingparameters, namely the processing centre of the raw GRACE solutions, the geocentre motion,the Earth oblateness, the filtering, the leakage correction and the glacial isostatic adjustment(GIA). Considering all possible combinations of the different processing parameters leads toan ensemble of 1500 post-processed GRACE solutions, which is assumed to cover a significantpart of the uncertainty range of GRACE estimates. The ensemble-mean trend in all globalwater budget components agree within uncertainties with previous estimates based on differentsources of observations. The uncertainty in the global water budget is±0.27 mm yr−1[at the 90per cent confidence level (CL)] over 2005–2015. We find that the uncertainty in the geocentremotion and GIA corrections dominate the uncertainty in GRACE estimate of the globalwater budget. Their contribution to the uncertainty in GRACE estimate is respectively±0.21and±0.12 mm yr−1(90 per cent CL). This uncertainty in GRACE estimate implies anuncertainty in the net warming of the ocean and the Earth energy budget of±0.25 W m−2(90per cent CL) when inferred using the sea level budget approach. Article in Journal/Newspaper Antarc* Antarctica Greenland Université Toulouse III - Paul Sabatier: HAL-UPS Geophysical Journal International 215 1 415 430 |
institution |
Open Polar |
collection |
Université Toulouse III - Paul Sabatier: HAL-UPS |
op_collection_id |
ftutoulouse3hal |
language |
English |
topic |
Global change from geodesy Satellite geodesy Sea level change Time variablegravity [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Global change from geodesy Satellite geodesy Sea level change Time variablegravity [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Blazquez, A Meyssignac, B. Lemoine, Jm Berthier, Etienne Ribes, A Cazenave, A. Exploring the uncertainty in GRACE estimates of the mass redistributions at the Earth surface: implications for the global water and sea level budgets |
topic_facet |
Global change from geodesy Satellite geodesy Sea level change Time variablegravity [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Observations from the Gravity Recovery and Climate Experiment (GRACE) satellite missionprovide quantitative estimates of the global water budget components. However, these estimatesare uncertain as they show discrepancies when different parameters are used in the processing ofthe GRACE data. We examine trends in ocean mass, ice loss from Antarctica, Greenland, arcticislands and trends in water storage over land and glaciers from GRACE data (2005–2015) andexplore the associated uncertainty. We consider variations in six different GRACE processingparameters, namely the processing centre of the raw GRACE solutions, the geocentre motion,the Earth oblateness, the filtering, the leakage correction and the glacial isostatic adjustment(GIA). Considering all possible combinations of the different processing parameters leads toan ensemble of 1500 post-processed GRACE solutions, which is assumed to cover a significantpart of the uncertainty range of GRACE estimates. The ensemble-mean trend in all globalwater budget components agree within uncertainties with previous estimates based on differentsources of observations. The uncertainty in the global water budget is±0.27 mm yr−1[at the 90per cent confidence level (CL)] over 2005–2015. We find that the uncertainty in the geocentremotion and GIA corrections dominate the uncertainty in GRACE estimate of the globalwater budget. Their contribution to the uncertainty in GRACE estimate is respectively±0.21and±0.12 mm yr−1(90 per cent CL). This uncertainty in GRACE estimate implies anuncertainty in the net warming of the ocean and the Earth energy budget of±0.25 W m−2(90per cent CL) when inferred using the sea level budget approach. |
author2 |
Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-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) Géosciences Environnement Toulouse (GET) Météo-France |
format |
Article in Journal/Newspaper |
author |
Blazquez, A Meyssignac, B. Lemoine, Jm Berthier, Etienne Ribes, A Cazenave, A. |
author_facet |
Blazquez, A Meyssignac, B. Lemoine, Jm Berthier, Etienne Ribes, A Cazenave, A. |
author_sort |
Blazquez, A |
title |
Exploring the uncertainty in GRACE estimates of the mass redistributions at the Earth surface: implications for the global water and sea level budgets |
title_short |
Exploring the uncertainty in GRACE estimates of the mass redistributions at the Earth surface: implications for the global water and sea level budgets |
title_full |
Exploring the uncertainty in GRACE estimates of the mass redistributions at the Earth surface: implications for the global water and sea level budgets |
title_fullStr |
Exploring the uncertainty in GRACE estimates of the mass redistributions at the Earth surface: implications for the global water and sea level budgets |
title_full_unstemmed |
Exploring the uncertainty in GRACE estimates of the mass redistributions at the Earth surface: implications for the global water and sea level budgets |
title_sort |
exploring the uncertainty in grace estimates of the mass redistributions at the earth surface: implications for the global water and sea level budgets |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-01952652 https://hal.science/hal-01952652/document https://hal.science/hal-01952652/file/ggy293.pdf https://doi.org/10.1093/gji/ggy293 |
genre |
Antarc* Antarctica Greenland |
genre_facet |
Antarc* Antarctica Greenland |
op_source |
ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal.science/hal-01952652 Geophysical Journal International, 2018, 215 (1), pp.415-430. ⟨10.1093/gji/ggy293⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1093/gji/ggy293 hal-01952652 https://hal.science/hal-01952652 https://hal.science/hal-01952652/document https://hal.science/hal-01952652/file/ggy293.pdf doi:10.1093/gji/ggy293 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1093/gji/ggy293 |
container_title |
Geophysical Journal International |
container_volume |
215 |
container_issue |
1 |
container_start_page |
415 |
op_container_end_page |
430 |
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1796943297311145984 |