Extreme events of snow grain size increase in East Antarctica and their relationship with meteorological conditions

International audience This study explores the seasonal variations in snow grain size on the East Antarctic Plateau, where dry metamorphism occurs, by using microwave radiometer observations from 2000 to 2022. Local meteorological conditions and large-scale atmospheric phenomena have been considered...

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Published in:The Cryosphere
Main Authors: Stefanini, Claudio, Macelloni, Giovanni, Leduc-Leballeur, Marion, Favier, Vincent, Pohl, Benjamin, Picard, Ghislain
Other Authors: Université de Venise Ca’ Foscari, Institute of Applied Physics "Nello Carrara" (IFAC), National Research Council of Italy, Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Centre de Recherches de Climatologie UMR Biogéosciences (CRC), Biogéosciences UMR 6282 (BGS), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), ANR-20-CE01-0013,ARCA,Climatologie des rivières atmosphériques en Antarctique(2020)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2024
Subjects:
Online Access:https://hal.science/hal-04453189
https://hal.science/hal-04453189/document
https://hal.science/hal-04453189/file/SMLLFPP2024.pdf
https://doi.org/10.5194/tc-18-593-2024
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spelling ftinsu:oai:HAL:hal-04453189v1 2024-04-21T07:46:40+00:00 Extreme events of snow grain size increase in East Antarctica and their relationship with meteorological conditions Stefanini, Claudio Macelloni, Giovanni Leduc-Leballeur, Marion Favier, Vincent Pohl, Benjamin Picard, Ghislain Université de Venise Ca’ Foscari Institute of Applied Physics "Nello Carrara" (IFAC) National Research Council of Italy Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Centre de Recherches de Climatologie UMR Biogéosciences (CRC) Biogéosciences UMR 6282 (BGS) Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) ANR-20-CE01-0013,ARCA,Climatologie des rivières atmosphériques en Antarctique(2020) 2024 https://hal.science/hal-04453189 https://hal.science/hal-04453189/document https://hal.science/hal-04453189/file/SMLLFPP2024.pdf https://doi.org/10.5194/tc-18-593-2024 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-18-593-2024 hal-04453189 https://hal.science/hal-04453189 https://hal.science/hal-04453189/document https://hal.science/hal-04453189/file/SMLLFPP2024.pdf doi:10.5194/tc-18-593-2024 info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.science/hal-04453189 The Cryosphere, 2024, 18 (2), pp.593-608. ⟨10.5194/tc-18-593-2024⟩ [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2024 ftinsu https://doi.org/10.5194/tc-18-593-2024 2024-04-05T00:27:06Z International audience This study explores the seasonal variations in snow grain size on the East Antarctic Plateau, where dry metamorphism occurs, by using microwave radiometer observations from 2000 to 2022. Local meteorological conditions and large-scale atmospheric phenomena have been considered in order to explain some peculiar changes in the snow grains. We find that the highest ice divide is the region with the largest grain size in the summer, mainly because the wind speed is low. Moreover, some extreme grain size values with respect to the average (over +3σ) were identified. In these cases, the ERA5 reanalysis revealed a high-pressure blocking close to the onsets of the summer increase in the grain size. It channels moisture intrusions from the mid-latitudes, through atmospheric rivers that cause major snowfall events over the plateau. If conditions of weak wind and low temperature occur during the following weeks, dry snow metamorphism is facilitated, leading to grain growth. This determines anomalous high maximums of the snow grain size at the end of summer. These phenomena confirm the importance of moisture intrusion events in East Antarctica and their impact on the physical properties of the ice sheet surface, with a co-occurrence of atmospheric rivers and seasonal changes in the grain size with a significance of over 95 %. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet The Cryosphere Institut national des sciences de l'Univers: HAL-INSU The Cryosphere 18 2 593 608
institution Open Polar
collection Institut national des sciences de l'Univers: HAL-INSU
op_collection_id ftinsu
language English
topic [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology
spellingShingle [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology
Stefanini, Claudio
Macelloni, Giovanni
Leduc-Leballeur, Marion
Favier, Vincent
Pohl, Benjamin
Picard, Ghislain
Extreme events of snow grain size increase in East Antarctica and their relationship with meteorological conditions
topic_facet [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology
description International audience This study explores the seasonal variations in snow grain size on the East Antarctic Plateau, where dry metamorphism occurs, by using microwave radiometer observations from 2000 to 2022. Local meteorological conditions and large-scale atmospheric phenomena have been considered in order to explain some peculiar changes in the snow grains. We find that the highest ice divide is the region with the largest grain size in the summer, mainly because the wind speed is low. Moreover, some extreme grain size values with respect to the average (over +3σ) were identified. In these cases, the ERA5 reanalysis revealed a high-pressure blocking close to the onsets of the summer increase in the grain size. It channels moisture intrusions from the mid-latitudes, through atmospheric rivers that cause major snowfall events over the plateau. If conditions of weak wind and low temperature occur during the following weeks, dry snow metamorphism is facilitated, leading to grain growth. This determines anomalous high maximums of the snow grain size at the end of summer. These phenomena confirm the importance of moisture intrusion events in East Antarctica and their impact on the physical properties of the ice sheet surface, with a co-occurrence of atmospheric rivers and seasonal changes in the grain size with a significance of over 95 %.
author2 Université de Venise Ca’ Foscari
Institute of Applied Physics "Nello Carrara" (IFAC)
National Research Council of Italy
Institut des Géosciences de l’Environnement (IGE)
Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )
Université Grenoble Alpes (UGA)
Centre de Recherches de Climatologie UMR Biogéosciences (CRC)
Biogéosciences UMR 6282 (BGS)
Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)
ANR-20-CE01-0013,ARCA,Climatologie des rivières atmosphériques en Antarctique(2020)
format Article in Journal/Newspaper
author Stefanini, Claudio
Macelloni, Giovanni
Leduc-Leballeur, Marion
Favier, Vincent
Pohl, Benjamin
Picard, Ghislain
author_facet Stefanini, Claudio
Macelloni, Giovanni
Leduc-Leballeur, Marion
Favier, Vincent
Pohl, Benjamin
Picard, Ghislain
author_sort Stefanini, Claudio
title Extreme events of snow grain size increase in East Antarctica and their relationship with meteorological conditions
title_short Extreme events of snow grain size increase in East Antarctica and their relationship with meteorological conditions
title_full Extreme events of snow grain size increase in East Antarctica and their relationship with meteorological conditions
title_fullStr Extreme events of snow grain size increase in East Antarctica and their relationship with meteorological conditions
title_full_unstemmed Extreme events of snow grain size increase in East Antarctica and their relationship with meteorological conditions
title_sort extreme events of snow grain size increase in east antarctica and their relationship with meteorological conditions
publisher HAL CCSD
publishDate 2024
url https://hal.science/hal-04453189
https://hal.science/hal-04453189/document
https://hal.science/hal-04453189/file/SMLLFPP2024.pdf
https://doi.org/10.5194/tc-18-593-2024
genre Antarc*
Antarctic
Antarctica
East Antarctica
Ice Sheet
The Cryosphere
genre_facet Antarc*
Antarctic
Antarctica
East Antarctica
Ice Sheet
The Cryosphere
op_source ISSN: 1994-0424
EISSN: 1994-0416
The Cryosphere
https://hal.science/hal-04453189
The Cryosphere, 2024, 18 (2), pp.593-608. ⟨10.5194/tc-18-593-2024⟩
op_relation info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-18-593-2024
hal-04453189
https://hal.science/hal-04453189
https://hal.science/hal-04453189/document
https://hal.science/hal-04453189/file/SMLLFPP2024.pdf
doi:10.5194/tc-18-593-2024
op_rights info:eu-repo/semantics/OpenAccess
op_doi https://doi.org/10.5194/tc-18-593-2024
container_title The Cryosphere
container_volume 18
container_issue 2
container_start_page 593
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