Impacts of atmospheric rivers on precipitation in Southern South America

Autores
Viale, Maximiliano; Valenzuela, Raúl; Garreaud, René D.; Ralph, F. Martin
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This study quantifies the impact of atmospheric rivers (ARs) on precipitation in southern South America. An AR detection algorithm was developed based on integrated water vapor transport (IVT) from 6-hourly CFSR reanalysis data over a 16-yr period (2001-16). AR landfalls were linked to precipitation using a comprehensive observing network that spanned large variations in terrain along and across the Andes from 27° to 55°S, including some sites with hourly data. Along the Pacific (west) coast, AR landfalls are most frequent between 38° and 50°S, averaging 35-40 days yr-1. This decreases rapidly to the south and north of this maximum, as well as to the east of the Andes. Landfalling ARs are more frequent in winter/spring (summer/fall) to the north (south) of ~43°S. ARs contribute 45%-60% of the annual precipitation in subtropical Chile (37°-32°S) and 40%-55% along the midlatitude west coast (37°-47°S). These values significantly exceed those in western North America, likely due to the Andes being taller. In subtropical and midlatitude regions, roughly half of all events with top-quartile precipitation rates occur under AR conditions. Median daily and hourly precipitation in ARs is 2-3 times that of other storms. The results of this study extend knowledge of the key roles of ARs on precipitation, weather, and climate in the South American region. They enable comparisons with other areas globally, provide context for specific events, and support local nowcasting and forecasting.
Fil: Viale, Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Cientifícas y Tecnológicas; Argentina. Universidad de Chile; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Valenzuela, Raúl. Universidad de Chile; Chile
Fil: Garreaud, René D.. Universidad de Chile; Chile
Fil: Ralph, F. Martin. University of California at San Diego; Estados Unidos
Materia
EXTRATROPICAL CYCLONES
PRECIPITATION
SOUTH AMERICA
SOUTH PACIFIC OCEAN
TOPOGRAPHIC EFFECTS
WATER VAPOR
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/87317
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/87317
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Impacts of atmospheric rivers on precipitation in Southern South AmericaViale, MaximilianoValenzuela, RaúlGarreaud, René D.Ralph, F. MartinEXTRATROPICAL CYCLONESPRECIPITATIONSOUTH AMERICASOUTH PACIFIC OCEANTOPOGRAPHIC EFFECTSWATER VAPORhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1This study quantifies the impact of atmospheric rivers (ARs) on precipitation in southern South America. An AR detection algorithm was developed based on integrated water vapor transport (IVT) from 6-hourly CFSR reanalysis data over a 16-yr period (2001-16). AR landfalls were linked to precipitation using a comprehensive observing network that spanned large variations in terrain along and across the Andes from 27° to 55°S, including some sites with hourly data. Along the Pacific (west) coast, AR landfalls are most frequent between 38° and 50°S, averaging 35-40 days yr-1. This decreases rapidly to the south and north of this maximum, as well as to the east of the Andes. Landfalling ARs are more frequent in winter/spring (summer/fall) to the north (south) of ~43°S. ARs contribute 45%-60% of the annual precipitation in subtropical Chile (37°-32°S) and 40%-55% along the midlatitude west coast (37°-47°S). These values significantly exceed those in western North America, likely due to the Andes being taller. In subtropical and midlatitude regions, roughly half of all events with top-quartile precipitation rates occur under AR conditions. Median daily and hourly precipitation in ARs is 2-3 times that of other storms. The results of this study extend knowledge of the key roles of ARs on precipitation, weather, and climate in the South American region. They enable comparisons with other areas globally, provide context for specific events, and support local nowcasting and forecasting.Fil: Viale, Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Cientifícas y Tecnológicas; Argentina. Universidad de Chile; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Valenzuela, Raúl. Universidad de Chile; ChileFil: Garreaud, René D.. Universidad de Chile; ChileFil: Ralph, F. Martin. University of California at San Diego; Estados UnidosAmerican Meteorological Society2018-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/87317Viale, Maximiliano; Valenzuela, Raúl; Garreaud, René D.; Ralph, F. Martin; Impacts of atmospheric rivers on precipitation in Southern South America; American Meteorological Society; Journal Of Hydrometeorology; 19; 10; 10-2018; 1671-16871525-755XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://journals.ametsoc.org/doi/full/10.1175/JHM-D-18-0006.1info:eu-repo/semantics/altIdentifier/doi/10.1175/JHM-D-18-0006.1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:06:38Zoai:ri.conicet.gov.ar:11336/87317instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:06:39.179CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Impacts of atmospheric rivers on precipitation in Southern South America
title Impacts of atmospheric rivers on precipitation in Southern South America
spellingShingle Impacts of atmospheric rivers on precipitation in Southern South America
Viale, Maximiliano
EXTRATROPICAL CYCLONES
PRECIPITATION
SOUTH AMERICA
SOUTH PACIFIC OCEAN
TOPOGRAPHIC EFFECTS
WATER VAPOR
title_short Impacts of atmospheric rivers on precipitation in Southern South America
title_full Impacts of atmospheric rivers on precipitation in Southern South America
title_fullStr Impacts of atmospheric rivers on precipitation in Southern South America
title_full_unstemmed Impacts of atmospheric rivers on precipitation in Southern South America
title_sort Impacts of atmospheric rivers on precipitation in Southern South America
dc.creator.none.fl_str_mv Viale, Maximiliano
Valenzuela, Raúl
Garreaud, René D.
Ralph, F. Martin
author Viale, Maximiliano
author_facet Viale, Maximiliano
Valenzuela, Raúl
Garreaud, René D.
Ralph, F. Martin
author_role author
author2 Valenzuela, Raúl
Garreaud, René D.
Ralph, F. Martin
author2_role author
author
author
dc.subject.none.fl_str_mv EXTRATROPICAL CYCLONES
PRECIPITATION
SOUTH AMERICA
SOUTH PACIFIC OCEAN
TOPOGRAPHIC EFFECTS
WATER VAPOR
topic EXTRATROPICAL CYCLONES
PRECIPITATION
SOUTH AMERICA
SOUTH PACIFIC OCEAN
TOPOGRAPHIC EFFECTS
WATER VAPOR
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv This study quantifies the impact of atmospheric rivers (ARs) on precipitation in southern South America. An AR detection algorithm was developed based on integrated water vapor transport (IVT) from 6-hourly CFSR reanalysis data over a 16-yr period (2001-16). AR landfalls were linked to precipitation using a comprehensive observing network that spanned large variations in terrain along and across the Andes from 27° to 55°S, including some sites with hourly data. Along the Pacific (west) coast, AR landfalls are most frequent between 38° and 50°S, averaging 35-40 days yr-1. This decreases rapidly to the south and north of this maximum, as well as to the east of the Andes. Landfalling ARs are more frequent in winter/spring (summer/fall) to the north (south) of ~43°S. ARs contribute 45%-60% of the annual precipitation in subtropical Chile (37°-32°S) and 40%-55% along the midlatitude west coast (37°-47°S). These values significantly exceed those in western North America, likely due to the Andes being taller. In subtropical and midlatitude regions, roughly half of all events with top-quartile precipitation rates occur under AR conditions. Median daily and hourly precipitation in ARs is 2-3 times that of other storms. The results of this study extend knowledge of the key roles of ARs on precipitation, weather, and climate in the South American region. They enable comparisons with other areas globally, provide context for specific events, and support local nowcasting and forecasting.
Fil: Viale, Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Cientifícas y Tecnológicas; Argentina. Universidad de Chile; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Valenzuela, Raúl. Universidad de Chile; Chile
Fil: Garreaud, René D.. Universidad de Chile; Chile
Fil: Ralph, F. Martin. University of California at San Diego; Estados Unidos
description This study quantifies the impact of atmospheric rivers (ARs) on precipitation in southern South America. An AR detection algorithm was developed based on integrated water vapor transport (IVT) from 6-hourly CFSR reanalysis data over a 16-yr period (2001-16). AR landfalls were linked to precipitation using a comprehensive observing network that spanned large variations in terrain along and across the Andes from 27° to 55°S, including some sites with hourly data. Along the Pacific (west) coast, AR landfalls are most frequent between 38° and 50°S, averaging 35-40 days yr-1. This decreases rapidly to the south and north of this maximum, as well as to the east of the Andes. Landfalling ARs are more frequent in winter/spring (summer/fall) to the north (south) of ~43°S. ARs contribute 45%-60% of the annual precipitation in subtropical Chile (37°-32°S) and 40%-55% along the midlatitude west coast (37°-47°S). These values significantly exceed those in western North America, likely due to the Andes being taller. In subtropical and midlatitude regions, roughly half of all events with top-quartile precipitation rates occur under AR conditions. Median daily and hourly precipitation in ARs is 2-3 times that of other storms. The results of this study extend knowledge of the key roles of ARs on precipitation, weather, and climate in the South American region. They enable comparisons with other areas globally, provide context for specific events, and support local nowcasting and forecasting.
publishDate 2018
dc.date.none.fl_str_mv 2018-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/87317
Viale, Maximiliano; Valenzuela, Raúl; Garreaud, René D.; Ralph, F. Martin; Impacts of atmospheric rivers on precipitation in Southern South America; American Meteorological Society; Journal Of Hydrometeorology; 19; 10; 10-2018; 1671-1687
1525-755X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/87317
identifier_str_mv Viale, Maximiliano; Valenzuela, Raúl; Garreaud, René D.; Ralph, F. Martin; Impacts of atmospheric rivers on precipitation in Southern South America; American Meteorological Society; Journal Of Hydrometeorology; 19; 10; 10-2018; 1671-1687
1525-755X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://journals.ametsoc.org/doi/full/10.1175/JHM-D-18-0006.1
info:eu-repo/semantics/altIdentifier/doi/10.1175/JHM-D-18-0006.1
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Meteorological Society
publisher.none.fl_str_mv American Meteorological Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842269968238903296
score 13.13397

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