Antarctic Atmospheric River Clmatology and Precipitation Impacts
peer reviewed The Antarctic ice sheet (AIS) is sensitive to short-term extreme meteorological events that can leave long-term impacts on the continent's surface mass balance (SMB). We investigate the impacts of atmospheric rivers (ARs) on the AIS precipitation budget using an AR detection algor...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | https://orbi.uliege.be/handle/2268/258886 https://orbi.uliege.be/bitstream/2268/258886/1/17046366.pdf https://doi.org/10.1029/2020JD033788 |
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ftorbi:oai:orbi.ulg.ac.be:2268/258886 2024-10-20T14:03:41+00:00 Antarctic Atmospheric River Clmatology and Precipitation Impacts Wille, Jonathan D Favier, V. Gorodestkaya, I. V. Agosta, C Kittel, Christoph Chowdhry Beeman, J Jourdain, N C Lenaerts, J. T. M. Codron, F 2021 https://orbi.uliege.be/handle/2268/258886 https://orbi.uliege.be/bitstream/2268/258886/1/17046366.pdf https://doi.org/10.1029/2020JD033788 en eng Wiley urn:issn:2169-897X urn:issn:2169-8996 https://orbi.uliege.be/handle/2268/258886 info:hdl:2268/258886 https://orbi.uliege.be/bitstream/2268/258886/1/17046366.pdf doi:10.1029/2020JD033788 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Journal of Geophysical Research. Atmospheres (2021) Antarctic Atmospheric river Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2021 ftorbi https://doi.org/10.1029/2020JD033788 2024-09-27T07:02:08Z peer reviewed The Antarctic ice sheet (AIS) is sensitive to short-term extreme meteorological events that can leave long-term impacts on the continent's surface mass balance (SMB). We investigate the impacts of atmospheric rivers (ARs) on the AIS precipitation budget using an AR detection algorithm and a regional climate model (Modèle Atmosphérique Régional) from 1980 to 2018. While ARs and their associated extreme vapor transport are relatively rare events over Antarctic coastal regions (∼3 days per year), they have a significant impact on the precipitation climatology. ARs are responsible for at least 10% of total accumulated snowfall across East Antarctica (localized areas reaching 20%) and a majority of extreme precipitation events. Trends in AR annual frequency since 1980 are observed across parts of AIS, most notably an increasing trend in Dronning Maud Land; however, interannual variability in AR frequency is much larger. This AR behavior appears to drive a significant portion of annual snowfall trends across East Antarctica, while controlling the interannual variability of precipitation across most of the AIS. AR landfalls are most likely when the circumpolar jet is highly amplified during blocking conditions in the Southern Ocean. There is a fingerprint of the Southern Annular Mode (SAM) on AR variability in West Antarctica with SAM+ (SAM−) favoring increased AR frequency in the Antarctic Peninsula (Amundsen-Ross Sea coastline). Given the relatively large influence ARs have on precipitation across the continent, it is advantageous for future studies of moisture transport to Antarctica to consider an AR framework especially when considering future SMB changes. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Dronning Maud Land East Antarctica Ice Sheet Ross Sea Southern Ocean West Antarctica University of Liège: ORBi (Open Repository and Bibliography) Antarctic Antarctic Peninsula Dronning Maud Land East Antarctica Ross Sea Southern Ocean The Antarctic West Antarctica Journal of Geophysical Research: Atmospheres 126 8 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Antarctic Atmospheric river Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Antarctic Atmospheric river Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Wille, Jonathan D Favier, V. Gorodestkaya, I. V. Agosta, C Kittel, Christoph Chowdhry Beeman, J Jourdain, N C Lenaerts, J. T. M. Codron, F Antarctic Atmospheric River Clmatology and Precipitation Impacts |
topic_facet |
Antarctic Atmospheric river Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed The Antarctic ice sheet (AIS) is sensitive to short-term extreme meteorological events that can leave long-term impacts on the continent's surface mass balance (SMB). We investigate the impacts of atmospheric rivers (ARs) on the AIS precipitation budget using an AR detection algorithm and a regional climate model (Modèle Atmosphérique Régional) from 1980 to 2018. While ARs and their associated extreme vapor transport are relatively rare events over Antarctic coastal regions (∼3 days per year), they have a significant impact on the precipitation climatology. ARs are responsible for at least 10% of total accumulated snowfall across East Antarctica (localized areas reaching 20%) and a majority of extreme precipitation events. Trends in AR annual frequency since 1980 are observed across parts of AIS, most notably an increasing trend in Dronning Maud Land; however, interannual variability in AR frequency is much larger. This AR behavior appears to drive a significant portion of annual snowfall trends across East Antarctica, while controlling the interannual variability of precipitation across most of the AIS. AR landfalls are most likely when the circumpolar jet is highly amplified during blocking conditions in the Southern Ocean. There is a fingerprint of the Southern Annular Mode (SAM) on AR variability in West Antarctica with SAM+ (SAM−) favoring increased AR frequency in the Antarctic Peninsula (Amundsen-Ross Sea coastline). Given the relatively large influence ARs have on precipitation across the continent, it is advantageous for future studies of moisture transport to Antarctica to consider an AR framework especially when considering future SMB changes. |
format |
Article in Journal/Newspaper |
author |
Wille, Jonathan D Favier, V. Gorodestkaya, I. V. Agosta, C Kittel, Christoph Chowdhry Beeman, J Jourdain, N C Lenaerts, J. T. M. Codron, F |
author_facet |
Wille, Jonathan D Favier, V. Gorodestkaya, I. V. Agosta, C Kittel, Christoph Chowdhry Beeman, J Jourdain, N C Lenaerts, J. T. M. Codron, F |
author_sort |
Wille, Jonathan D |
title |
Antarctic Atmospheric River Clmatology and Precipitation Impacts |
title_short |
Antarctic Atmospheric River Clmatology and Precipitation Impacts |
title_full |
Antarctic Atmospheric River Clmatology and Precipitation Impacts |
title_fullStr |
Antarctic Atmospheric River Clmatology and Precipitation Impacts |
title_full_unstemmed |
Antarctic Atmospheric River Clmatology and Precipitation Impacts |
title_sort |
antarctic atmospheric river clmatology and precipitation impacts |
publisher |
Wiley |
publishDate |
2021 |
url |
https://orbi.uliege.be/handle/2268/258886 https://orbi.uliege.be/bitstream/2268/258886/1/17046366.pdf https://doi.org/10.1029/2020JD033788 |
geographic |
Antarctic Antarctic Peninsula Dronning Maud Land East Antarctica Ross Sea Southern Ocean The Antarctic West Antarctica |
geographic_facet |
Antarctic Antarctic Peninsula Dronning Maud Land East Antarctica Ross Sea Southern Ocean The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Dronning Maud Land East Antarctica Ice Sheet Ross Sea Southern Ocean West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Dronning Maud Land East Antarctica Ice Sheet Ross Sea Southern Ocean West Antarctica |
op_source |
Journal of Geophysical Research. Atmospheres (2021) |
op_relation |
urn:issn:2169-897X urn:issn:2169-8996 https://orbi.uliege.be/handle/2268/258886 info:hdl:2268/258886 https://orbi.uliege.be/bitstream/2268/258886/1/17046366.pdf doi:10.1029/2020JD033788 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2020JD033788 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
126 |
container_issue |
8 |
_version_ |
1813448902236438528 |