Extreme precipitation records in Antarctica

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 ev...

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Detalles Bibliográficos
Autores: González-Herrero, Sergi, Vasallo, Francisco, Bech, Joan, Gorodetskaya, Irina, Elvira, Benito, Justel, Ana
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2023
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/215331
Acceso en línea:https://hdl.handle.net/2445/215331
Access Level:acceso abierto
Palabra clave:Antàrtida
Temps (Meteorologia)
Precipitacions (Meteorologia)
Antarctica
Weather
Precipitations (Meteorology)
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spelling Extreme precipitation records in AntarcticaGonzález-Herrero, SergiVasallo, FranciscoBech, JoanGorodetskaya, IrinaElvira, BenitoJustel, AnaAntàrtidaTemps (Meteorologia)Precipitacions (Meteorologia)AntarcticaWeatherPrecipitations (Meteorology)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.Wiley2024202420232024info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion1 p.application/pdfhttps://hdl.handle.net/2445/215331Articles publicats en revistes (Física Aplicada)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1002/joc.8020International Journal of Climatology, 2023https://doi.org/10.1002/joc.8020(c) Royal Meteorological Society, 2023info:eu-repo/semantics/openAccessoai:recercat.cat:2445/2153312026-05-29T05:05:01Z
dc.title.none.fl_str_mv Extreme precipitation records in Antarctica
title Extreme precipitation records in Antarctica
spellingShingle Extreme precipitation records in Antarctica
González-Herrero, Sergi
Antàrtida
Temps (Meteorologia)
Precipitacions (Meteorologia)
Antarctica
Weather
Precipitations (Meteorology)
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
dc.creator.none.fl_str_mv González-Herrero, Sergi
Vasallo, Francisco
Bech, Joan
Gorodetskaya, Irina
Elvira, Benito
Justel, Ana
author González-Herrero, Sergi
author_facet González-Herrero, Sergi
Vasallo, Francisco
Bech, Joan
Gorodetskaya, Irina
Elvira, Benito
Justel, Ana
author_role author
author2 Vasallo, Francisco
Bech, Joan
Gorodetskaya, Irina
Elvira, Benito
Justel, Ana
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Antàrtida
Temps (Meteorologia)
Precipitacions (Meteorologia)
Antarctica
Weather
Precipitations (Meteorology)
topic Antàrtida
Temps (Meteorologia)
Precipitacions (Meteorologia)
Antarctica
Weather
Precipitations (Meteorology)
description 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.
publishDate 2023
dc.date.none.fl_str_mv 2023
2024
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/215331
url https://hdl.handle.net/2445/215331
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1002/joc.8020
International Journal of Climatology, 2023
https://doi.org/10.1002/joc.8020
dc.rights.none.fl_str_mv (c) Royal Meteorological Society, 2023
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Royal Meteorological Society, 2023
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 1 p.
application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv Articles publicats en revistes (Física Aplicada)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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