Snow melting bias in microwave mapping of Antarctic snow accumulation

International audience Satellite records of microwave surface emission have been used to interpolate in-situ observations of Antarctic surface mass balance (SMB) and build continental-scale maps of accumulation. Using a carefully screened subset of accumulation measurements in the 90°–180° E sector,...

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Main Authors: Magand, O., Picard, G., Brucker, L., Fily, M., Genthon, C.
Other Authors: 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)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2008
Subjects:
Online Access:https://hal.science/hal-00331155
https://hal.science/hal-00331155/document
https://hal.science/hal-00331155/file/tcd-2-255-2008.pdf
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spelling ftinsu:oai:HAL:hal-00331155v1 2024-04-28T08:00:13+00:00 Snow melting bias in microwave mapping of Antarctic snow accumulation Magand, O. Picard, G. Brucker, L. Fily, M. Genthon, C. 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) 2008-04-24 https://hal.science/hal-00331155 https://hal.science/hal-00331155/document https://hal.science/hal-00331155/file/tcd-2-255-2008.pdf en eng HAL CCSD Copernicus hal-00331155 https://hal.science/hal-00331155 https://hal.science/hal-00331155/document https://hal.science/hal-00331155/file/tcd-2-255-2008.pdf info:eu-repo/semantics/OpenAccess ISSN: 1994-0432 EISSN: 1994-0440 The Cryosphere Discussions https://hal.science/hal-00331155 The Cryosphere Discussions, 2008, 2 (2), pp.255-273 [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2008 ftinsu 2024-04-05T00:36:33Z International audience Satellite records of microwave surface emission have been used to interpolate in-situ observations of Antarctic surface mass balance (SMB) and build continental-scale maps of accumulation. Using a carefully screened subset of accumulation measurements in the 90°–180° E sector, we show a reasonable agreement with microwave-based accumulation map in the dry-snow regions, but large discrepancies in the coastal regions where melt occurs during summer. Using an emission microwave model, we explain the failure of microwave sensors to retrieve accumulation by the presence of layers created by melt/re-freeze cycles. We conclude that regions potentially affected by melting should be masked-out in microwave-based interpolation schemes. Article in Journal/Newspaper Antarc* Antarctic The Cryosphere The Cryosphere Discussions Institut national des sciences de l'Univers: HAL-INSU
institution Open Polar
collection Institut national des sciences de l'Univers: HAL-INSU
op_collection_id ftinsu
language English
topic [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces
environment
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
spellingShingle [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces
environment
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
Magand, O.
Picard, G.
Brucker, L.
Fily, M.
Genthon, C.
Snow melting bias in microwave mapping of Antarctic snow accumulation
topic_facet [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces
environment
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
description International audience Satellite records of microwave surface emission have been used to interpolate in-situ observations of Antarctic surface mass balance (SMB) and build continental-scale maps of accumulation. Using a carefully screened subset of accumulation measurements in the 90°–180° E sector, we show a reasonable agreement with microwave-based accumulation map in the dry-snow regions, but large discrepancies in the coastal regions where melt occurs during summer. Using an emission microwave model, we explain the failure of microwave sensors to retrieve accumulation by the presence of layers created by melt/re-freeze cycles. We conclude that regions potentially affected by melting should be masked-out in microwave-based interpolation schemes.
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)
format Article in Journal/Newspaper
author Magand, O.
Picard, G.
Brucker, L.
Fily, M.
Genthon, C.
author_facet Magand, O.
Picard, G.
Brucker, L.
Fily, M.
Genthon, C.
author_sort Magand, O.
title Snow melting bias in microwave mapping of Antarctic snow accumulation
title_short Snow melting bias in microwave mapping of Antarctic snow accumulation
title_full Snow melting bias in microwave mapping of Antarctic snow accumulation
title_fullStr Snow melting bias in microwave mapping of Antarctic snow accumulation
title_full_unstemmed Snow melting bias in microwave mapping of Antarctic snow accumulation
title_sort snow melting bias in microwave mapping of antarctic snow accumulation
publisher HAL CCSD
publishDate 2008
url https://hal.science/hal-00331155
https://hal.science/hal-00331155/document
https://hal.science/hal-00331155/file/tcd-2-255-2008.pdf
genre Antarc*
Antarctic
The Cryosphere
The Cryosphere Discussions
genre_facet Antarc*
Antarctic
The Cryosphere
The Cryosphere Discussions
op_source ISSN: 1994-0432
EISSN: 1994-0440
The Cryosphere Discussions
https://hal.science/hal-00331155
The Cryosphere Discussions, 2008, 2 (2), pp.255-273
op_relation hal-00331155
https://hal.science/hal-00331155
https://hal.science/hal-00331155/document
https://hal.science/hal-00331155/file/tcd-2-255-2008.pdf
op_rights info:eu-repo/semantics/OpenAccess
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