The influence of the atlantic multidecadal oscillation on the choco low-level jet and precipitation in colombia
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional do INPA |
Texto Completo: | https://repositorio.inpa.gov.br/handle/1/16232 |
Resumo: | This study examines the influence of the Atlantic Multidecadal Oscillation (AMO) on the Choco Low-level Jet (CJ) variations during the 1983-2016 period. Considering the September-November (SON) 925 hPa zonal wind index in the CJ core, a significant breakpoint occurs in 1997 with larger values after 1997. The changes in the CJ and Caribbean Low-Level Jet (CLLJ), and their related ocean-atmospheric patterns and impacts on precipitation over Colombia were analyzed considering separately the 1983-1996 and 1998-2016 periods, which overlap the cold and warm AMO phases, respectively During the 1998-2016 period, the negative sea surface temperature (SST) anomalies in the tropical Pacific Ocean and the positive ones in the Caribbean Sea and Tropical North Atlantic (TNA) strengthen the CJ and weaken the CLLJ, and moisture is transported into Central and Western Colombia increasing the rainfall there. Our results indicate that part of the CJ strengthening after 1997 was due to a higher percentage of intense CJ events coinciding with La Nina events during the warm AMO and cold Pacific Decadal Oscillation (PDO) background. However, the AMO-related SST and sea level pressure (SLP) variations in the TNA seem to be more crucial in modulating the CJ and CLLJ intensities, such that CJ is weakened (intensified) and CLLJ is intensified (weakened) before (after) 1997. As far as we know, the relations of the CJ and CLLJ intensities to the AMO phases were not examined before and might be useful for modeling studies. © 2020 by the authors. |
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Cerón, Wilmar LoaizaAndreoli, Rita ValériaKayano, Mary ToshieSouza, Rodrigo Augusto Ferreira deJones, CharlesCarvalho, Leila M.V.2020-06-01T14:25:40Z2020-06-01T14:25:40Z2020https://repositorio.inpa.gov.br/handle/1/1623210.3390/atmos11020174This study examines the influence of the Atlantic Multidecadal Oscillation (AMO) on the Choco Low-level Jet (CJ) variations during the 1983-2016 period. Considering the September-November (SON) 925 hPa zonal wind index in the CJ core, a significant breakpoint occurs in 1997 with larger values after 1997. The changes in the CJ and Caribbean Low-Level Jet (CLLJ), and their related ocean-atmospheric patterns and impacts on precipitation over Colombia were analyzed considering separately the 1983-1996 and 1998-2016 periods, which overlap the cold and warm AMO phases, respectively During the 1998-2016 period, the negative sea surface temperature (SST) anomalies in the tropical Pacific Ocean and the positive ones in the Caribbean Sea and Tropical North Atlantic (TNA) strengthen the CJ and weaken the CLLJ, and moisture is transported into Central and Western Colombia increasing the rainfall there. Our results indicate that part of the CJ strengthening after 1997 was due to a higher percentage of intense CJ events coinciding with La Nina events during the warm AMO and cold Pacific Decadal Oscillation (PDO) background. However, the AMO-related SST and sea level pressure (SLP) variations in the TNA seem to be more crucial in modulating the CJ and CLLJ intensities, such that CJ is weakened (intensified) and CLLJ is intensified (weakened) before (after) 1997. As far as we know, the relations of the CJ and CLLJ intensities to the AMO phases were not examined before and might be useful for modeling studies. © 2020 by the authors.Volume 11, Número 2Attribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessMoisturePrecipitation (chemical)Precipitation (meteorology)Sea LevelSurface WatersTropicsAtlantic Multidecadal OscillationsLow Frequency VariabilityLow Level JetMoisture TransportPacific Decadal OscillationSouth AmericaAtmospheric MovementsAir-sea InteractionAtlantic Multidecadal OscillationJet FlowMoisture TransferPacific Decadal OscillationPrecipitation (climatology)RainfallSea Level PressureSea Surface TemperatureAtlantic OceanAtlantic Ocean (north)Caribbean SeaColombiaPacific OceanPacific Ocean (tropical)The influence of the atlantic multidecadal oscillation on the choco low-level jet and precipitation in colombiainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleAtmosphereengreponame:Repositório Institucional do INPAinstname:Instituto Nacional de Pesquisas da Amazônia (INPA)instacron:INPAORIGINALInfluence.pdfapplication/pdf6518908https://repositorio.inpa.gov.br/bitstream/1/16232/1/Influence.pdf24e72d3e3a0b5732d7ab42d98de63f95MD51CC-LICENSElicense_rdfapplication/octet-stream914https://repositorio.inpa.gov.br/bitstream/1/16232/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD521/162322020-07-14 11:34:18.292oai:repositorio:1/16232Repositório de PublicaçõesPUBhttps://repositorio.inpa.gov.br/oai/requestopendoar:2020-07-14T15:34:18Repositório Institucional do INPA - Instituto Nacional de Pesquisas da Amazônia (INPA)false |
dc.title.en.fl_str_mv |
The influence of the atlantic multidecadal oscillation on the choco low-level jet and precipitation in colombia |
title |
The influence of the atlantic multidecadal oscillation on the choco low-level jet and precipitation in colombia |
spellingShingle |
The influence of the atlantic multidecadal oscillation on the choco low-level jet and precipitation in colombia Cerón, Wilmar Loaiza Moisture Precipitation (chemical) Precipitation (meteorology) Sea Level Surface Waters Tropics Atlantic Multidecadal Oscillations Low Frequency Variability Low Level Jet Moisture Transport Pacific Decadal Oscillation South America Atmospheric Movements Air-sea Interaction Atlantic Multidecadal Oscillation Jet Flow Moisture Transfer Pacific Decadal Oscillation Precipitation (climatology) Rainfall Sea Level Pressure Sea Surface Temperature Atlantic Ocean Atlantic Ocean (north) Caribbean Sea Colombia Pacific Ocean Pacific Ocean (tropical) |
title_short |
The influence of the atlantic multidecadal oscillation on the choco low-level jet and precipitation in colombia |
title_full |
The influence of the atlantic multidecadal oscillation on the choco low-level jet and precipitation in colombia |
title_fullStr |
The influence of the atlantic multidecadal oscillation on the choco low-level jet and precipitation in colombia |
title_full_unstemmed |
The influence of the atlantic multidecadal oscillation on the choco low-level jet and precipitation in colombia |
title_sort |
The influence of the atlantic multidecadal oscillation on the choco low-level jet and precipitation in colombia |
author |
Cerón, Wilmar Loaiza |
author_facet |
Cerón, Wilmar Loaiza Andreoli, Rita Valéria Kayano, Mary Toshie Souza, Rodrigo Augusto Ferreira de Jones, Charles Carvalho, Leila M.V. |
author_role |
author |
author2 |
Andreoli, Rita Valéria Kayano, Mary Toshie Souza, Rodrigo Augusto Ferreira de Jones, Charles Carvalho, Leila M.V. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Cerón, Wilmar Loaiza Andreoli, Rita Valéria Kayano, Mary Toshie Souza, Rodrigo Augusto Ferreira de Jones, Charles Carvalho, Leila M.V. |
dc.subject.eng.fl_str_mv |
Moisture Precipitation (chemical) Precipitation (meteorology) Sea Level Surface Waters Tropics Atlantic Multidecadal Oscillations Low Frequency Variability Low Level Jet Moisture Transport Pacific Decadal Oscillation South America Atmospheric Movements Air-sea Interaction Atlantic Multidecadal Oscillation Jet Flow Moisture Transfer Pacific Decadal Oscillation Precipitation (climatology) Rainfall Sea Level Pressure Sea Surface Temperature Atlantic Ocean Atlantic Ocean (north) Caribbean Sea Colombia Pacific Ocean Pacific Ocean (tropical) |
topic |
Moisture Precipitation (chemical) Precipitation (meteorology) Sea Level Surface Waters Tropics Atlantic Multidecadal Oscillations Low Frequency Variability Low Level Jet Moisture Transport Pacific Decadal Oscillation South America Atmospheric Movements Air-sea Interaction Atlantic Multidecadal Oscillation Jet Flow Moisture Transfer Pacific Decadal Oscillation Precipitation (climatology) Rainfall Sea Level Pressure Sea Surface Temperature Atlantic Ocean Atlantic Ocean (north) Caribbean Sea Colombia Pacific Ocean Pacific Ocean (tropical) |
description |
This study examines the influence of the Atlantic Multidecadal Oscillation (AMO) on the Choco Low-level Jet (CJ) variations during the 1983-2016 period. Considering the September-November (SON) 925 hPa zonal wind index in the CJ core, a significant breakpoint occurs in 1997 with larger values after 1997. The changes in the CJ and Caribbean Low-Level Jet (CLLJ), and their related ocean-atmospheric patterns and impacts on precipitation over Colombia were analyzed considering separately the 1983-1996 and 1998-2016 periods, which overlap the cold and warm AMO phases, respectively During the 1998-2016 period, the negative sea surface temperature (SST) anomalies in the tropical Pacific Ocean and the positive ones in the Caribbean Sea and Tropical North Atlantic (TNA) strengthen the CJ and weaken the CLLJ, and moisture is transported into Central and Western Colombia increasing the rainfall there. Our results indicate that part of the CJ strengthening after 1997 was due to a higher percentage of intense CJ events coinciding with La Nina events during the warm AMO and cold Pacific Decadal Oscillation (PDO) background. However, the AMO-related SST and sea level pressure (SLP) variations in the TNA seem to be more crucial in modulating the CJ and CLLJ intensities, such that CJ is weakened (intensified) and CLLJ is intensified (weakened) before (after) 1997. As far as we know, the relations of the CJ and CLLJ intensities to the AMO phases were not examined before and might be useful for modeling studies. © 2020 by the authors. |
publishDate |
2020 |
dc.date.accessioned.fl_str_mv |
2020-06-01T14:25:40Z |
dc.date.available.fl_str_mv |
2020-06-01T14:25:40Z |
dc.date.issued.fl_str_mv |
2020 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://repositorio.inpa.gov.br/handle/1/16232 |
dc.identifier.doi.none.fl_str_mv |
10.3390/atmos11020174 |
url |
https://repositorio.inpa.gov.br/handle/1/16232 |
identifier_str_mv |
10.3390/atmos11020174 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Volume 11, Número 2 |
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Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ info:eu-repo/semantics/openAccess |
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Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ |
eu_rights_str_mv |
openAccess |
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Atmosphere |
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Atmosphere |
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