Extreme precipitation records in Antarctica
Abstract Monitoring extreme precipitation records (EPRs), that is, the most extreme precipitation events, is a challenge in Antarctica due to the reduced number of stations available in the continent and the limitations of the instrumentation for measuring solid precipitation. Still, extreme precipi...
Published in: | International Journal of Climatology |
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Online Access: | http://dx.doi.org/10.1002/joc.8020 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.8020 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.8020 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.8020 |
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crwiley:10.1002/joc.8020 2024-10-13T14:01:08+00:00 Extreme precipitation records in Antarctica González‐Herrero, Sergi Vasallo, Francisco Bech, Joan Gorodetskaya, Irina Elvira, Benito Justel, Ana Spanish State Research Agency European Regional Development Fund Generalitat de Catalunya Ministry of Science, Technology, Innovation and Communication Foundation for Science and Technology 2023 http://dx.doi.org/10.1002/joc.8020 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.8020 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.8020 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.8020 en eng Wiley http://creativecommons.org/licenses/by/4.0/ International Journal of Climatology volume 43, issue 7, page 3125-3138 ISSN 0899-8418 1097-0088 journal-article 2023 crwiley https://doi.org/10.1002/joc.8020 2024-09-19T04:19:15Z Abstract Monitoring extreme precipitation records (EPRs), that is, the most extreme precipitation events, is a challenge in Antarctica due to the reduced number of stations available in the continent and the limitations of the instrumentation for measuring solid precipitation. Still, extreme precipitation events may contribute substantially to the variability of ice sheet snow accumulation and even may cause important ecological impacts. This article presents the Antarctic EPRs at different temporal scales, studying the relationship between precipitation amount and temporal duration through a power scaling law, ranging from 1 day to 2 years. This is achieved using precipitation datasets from the ERA5 reanalysis and the RACMO2 regional climate model. Moreover, we present a selection of EPRs case studies examining the synoptic mechanisms that produce such events in Antarctica. Despite ERA5 EPRs are usually lower than those found in RACMO2, they present similar scaling exponents. EPRs are found in Loubet and south Graham Coasts, in the central section of the Antarctic Peninsula, and in the north of Alexander Island, where orographic enhancement increases precipitation amounts. As expected, Antarctic EPRs are much lower than world‐wide EPRs, ranging from 6 to 10% at short temporal scales (from 1 to 10 days) and from 10 to 20% at long temporal scales (from 90 days to 2 years) in ERA5. Regional variability of extreme precipitation scaling exponents show similar spatial patterns than previously calculated precipitation concentration. On the other hand, the lack of summer events in Antarctic EPRs evidences that stronger fluxes in winter play a key role on extreme precipitation during EPR events, which are mainly produced by long‐range transport of moisture by atmospheric rivers impinging on Antarctic mountains. Article in Journal/Newspaper Alexander Island Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Wiley Online Library Alexander Island ENVELOPE(-69.895,-69.895,-71.287,-71.287) Antarctic Antarctic Peninsula Loubet ENVELOPE(-66.267,-66.267,-66.917,-66.917) The Antarctic International Journal of Climatology 43 7 3125 3138 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Monitoring extreme precipitation records (EPRs), that is, the most extreme precipitation events, is a challenge in Antarctica due to the reduced number of stations available in the continent and the limitations of the instrumentation for measuring solid precipitation. Still, extreme precipitation events may contribute substantially to the variability of ice sheet snow accumulation and even may cause important ecological impacts. This article presents the Antarctic EPRs at different temporal scales, studying the relationship between precipitation amount and temporal duration through a power scaling law, ranging from 1 day to 2 years. This is achieved using precipitation datasets from the ERA5 reanalysis and the RACMO2 regional climate model. Moreover, we present a selection of EPRs case studies examining the synoptic mechanisms that produce such events in Antarctica. Despite ERA5 EPRs are usually lower than those found in RACMO2, they present similar scaling exponents. EPRs are found in Loubet and south Graham Coasts, in the central section of the Antarctic Peninsula, and in the north of Alexander Island, where orographic enhancement increases precipitation amounts. As expected, Antarctic EPRs are much lower than world‐wide EPRs, ranging from 6 to 10% at short temporal scales (from 1 to 10 days) and from 10 to 20% at long temporal scales (from 90 days to 2 years) in ERA5. Regional variability of extreme precipitation scaling exponents show similar spatial patterns than previously calculated precipitation concentration. On the other hand, the lack of summer events in Antarctic EPRs evidences that stronger fluxes in winter play a key role on extreme precipitation during EPR events, which are mainly produced by long‐range transport of moisture by atmospheric rivers impinging on Antarctic mountains. |
author2 |
Spanish State Research Agency European Regional Development Fund Generalitat de Catalunya Ministry of Science, Technology, Innovation and Communication Foundation for Science and Technology |
format |
Article in Journal/Newspaper |
author |
González‐Herrero, Sergi Vasallo, Francisco Bech, Joan Gorodetskaya, Irina Elvira, Benito Justel, Ana |
spellingShingle |
González‐Herrero, Sergi Vasallo, Francisco Bech, Joan Gorodetskaya, Irina Elvira, Benito Justel, Ana Extreme precipitation records in Antarctica |
author_facet |
González‐Herrero, Sergi Vasallo, Francisco Bech, Joan Gorodetskaya, Irina Elvira, Benito Justel, Ana |
author_sort |
González‐Herrero, Sergi |
title |
Extreme precipitation records in Antarctica |
title_short |
Extreme precipitation records in Antarctica |
title_full |
Extreme precipitation records in Antarctica |
title_fullStr |
Extreme precipitation records in Antarctica |
title_full_unstemmed |
Extreme precipitation records in Antarctica |
title_sort |
extreme precipitation records in antarctica |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1002/joc.8020 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.8020 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.8020 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.8020 |
long_lat |
ENVELOPE(-69.895,-69.895,-71.287,-71.287) ENVELOPE(-66.267,-66.267,-66.917,-66.917) |
geographic |
Alexander Island Antarctic Antarctic Peninsula Loubet The Antarctic |
geographic_facet |
Alexander Island Antarctic Antarctic Peninsula Loubet The Antarctic |
genre |
Alexander Island Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet |
genre_facet |
Alexander Island Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet |
op_source |
International Journal of Climatology volume 43, issue 7, page 3125-3138 ISSN 0899-8418 1097-0088 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/joc.8020 |
container_title |
International Journal of Climatology |
container_volume |
43 |
container_issue |
7 |
container_start_page |
3125 |
op_container_end_page |
3138 |
_version_ |
1812808533865922560 |