Interannual variation of the Antarctic Ice Sheet from a combined analysis of satellite gravimetry and altimetry data
International audience Assessment of the long term mass balance of the Antarctic Ice Sheet, and thus the determination of its contribution to sea level rise, requires an understanding of interannual variability and associated causal mechanisms. We performed a combined analysis of surface-mass and el...
Published in: | Earth and Planetary Science Letters |
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Online Access: | https://hal.science/hal-01231061 https://doi.org/10.1016/j.epsl.2015.03.045 |
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ftinsu:oai:HAL:hal-01231061v1 2023-12-17T10:22:02+01:00 Interannual variation of the Antarctic Ice Sheet from a combined analysis of satellite gravimetry and altimetry data Mémin, Anthony Flament, T. Alizier, B. Watson, C. Rémy, Florence Géoazur (GEOAZUR 7329) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud ) 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) School of Earth Sciences Hobart University of Tasmania Hobart, Australia (UTAS) School of land and food (University of Tasmania) 2015-07-15 https://hal.science/hal-01231061 https://doi.org/10.1016/j.epsl.2015.03.045 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2015.03.045 hal-01231061 https://hal.science/hal-01231061 doi:10.1016/j.epsl.2015.03.045 ISSN: 0012-821X Earth and Planetary Science Letters https://hal.science/hal-01231061 Earth and Planetary Science Letters, 2015, 422, pp.150-156. ⟨10.1016/j.epsl.2015.03.045⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2015 ftinsu https://doi.org/10.1016/j.epsl.2015.03.045 2023-11-22T17:51:01Z International audience Assessment of the long term mass balance of the Antarctic Ice Sheet, and thus the determination of its contribution to sea level rise, requires an understanding of interannual variability and associated causal mechanisms. We performed a combined analysis of surface-mass and elevation changes using data from the GRACE and Envisat satellite missions, respectively. Using empirical orthogonal functions and singular value decompositions of each data set, we find a quasi 4.7-yr periodic signal between 08/2002 and 10/2010 that accounts for ∼15–30%∼15–30% of the time variability of the filtered and detrended surface-mass and elevation data. Computation of the density of this variable mass load corresponds to snow or uncompacted firn. Changes reach maximum amplitude within the first 100 km from the coast where it contributes up to 30–35% of the annual rate of accumulation. Extending the analysis to 09/2014 using surface-mass changes only, we have found anomalies with a periodicity of about 4–6 yrs that circle the AIS in about 9–10 yrs. These properties connect the observed anomalies to the Antarctic Circumpolar Wave (ACW) which is known to affect several key climate variables, including precipitation. It suggests that variability in the surface-mass balance of the Antarctic Ice Sheet may also be modulated by the ACW. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Institut national des sciences de l'Univers: HAL-INSU Antarctic The Antarctic Earth and Planetary Science Letters 422 150 156 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Mémin, Anthony Flament, T. Alizier, B. Watson, C. Rémy, Florence Interannual variation of the Antarctic Ice Sheet from a combined analysis of satellite gravimetry and altimetry data |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Assessment of the long term mass balance of the Antarctic Ice Sheet, and thus the determination of its contribution to sea level rise, requires an understanding of interannual variability and associated causal mechanisms. We performed a combined analysis of surface-mass and elevation changes using data from the GRACE and Envisat satellite missions, respectively. Using empirical orthogonal functions and singular value decompositions of each data set, we find a quasi 4.7-yr periodic signal between 08/2002 and 10/2010 that accounts for ∼15–30%∼15–30% of the time variability of the filtered and detrended surface-mass and elevation data. Computation of the density of this variable mass load corresponds to snow or uncompacted firn. Changes reach maximum amplitude within the first 100 km from the coast where it contributes up to 30–35% of the annual rate of accumulation. Extending the analysis to 09/2014 using surface-mass changes only, we have found anomalies with a periodicity of about 4–6 yrs that circle the AIS in about 9–10 yrs. These properties connect the observed anomalies to the Antarctic Circumpolar Wave (ACW) which is known to affect several key climate variables, including precipitation. It suggests that variability in the surface-mass balance of the Antarctic Ice Sheet may also be modulated by the ACW. |
author2 |
Géoazur (GEOAZUR 7329) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud ) 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) School of Earth Sciences Hobart University of Tasmania Hobart, Australia (UTAS) School of land and food (University of Tasmania) |
format |
Article in Journal/Newspaper |
author |
Mémin, Anthony Flament, T. Alizier, B. Watson, C. Rémy, Florence |
author_facet |
Mémin, Anthony Flament, T. Alizier, B. Watson, C. Rémy, Florence |
author_sort |
Mémin, Anthony |
title |
Interannual variation of the Antarctic Ice Sheet from a combined analysis of satellite gravimetry and altimetry data |
title_short |
Interannual variation of the Antarctic Ice Sheet from a combined analysis of satellite gravimetry and altimetry data |
title_full |
Interannual variation of the Antarctic Ice Sheet from a combined analysis of satellite gravimetry and altimetry data |
title_fullStr |
Interannual variation of the Antarctic Ice Sheet from a combined analysis of satellite gravimetry and altimetry data |
title_full_unstemmed |
Interannual variation of the Antarctic Ice Sheet from a combined analysis of satellite gravimetry and altimetry data |
title_sort |
interannual variation of the antarctic ice sheet from a combined analysis of satellite gravimetry and altimetry data |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01231061 https://doi.org/10.1016/j.epsl.2015.03.045 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal.science/hal-01231061 Earth and Planetary Science Letters, 2015, 422, pp.150-156. ⟨10.1016/j.epsl.2015.03.045⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2015.03.045 hal-01231061 https://hal.science/hal-01231061 doi:10.1016/j.epsl.2015.03.045 |
op_doi |
https://doi.org/10.1016/j.epsl.2015.03.045 |
container_title |
Earth and Planetary Science Letters |
container_volume |
422 |
container_start_page |
150 |
op_container_end_page |
156 |
_version_ |
1785542213786140672 |