Climatology and numerical case study of moisture sources associated with subtropical cyclogenesis over the southwestern Atlantic Ocean
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1002/2016JD025764 http://hdl.handle.net/11449/162912 |
Resumo: | An important feature during cyclogenesis is the availability of moisture to fuel the associated convective activity providing faster developments and more intense systems. In this work, an investigation of the role of local evaporation and remote water vapor transport prior to subtropical cyclogenesis in the southwestern South Atlantic (named RG1 region) is presented. Results were obtained analyzing the period from 1980 to 2015 with a Lagrangian particle dispersion model together with the ERA-Interim reanalysis. The northern sector of the Subtropical High in the South Atlantic Ocean stands out as the main source region of water vapor to the RG1, with the low-level northeasterly winds being responsible by moisture transport. An anomalous moisture transport from lower latitudes preceded the subtropical cyclogenesis events and provided the necessary water vapor to fuel the convective activity. A numerical case study using the Weather Research and Forecasting mesoscale model indicated that the remote moisture source is essential for subtropical cyclogenesis in RG1, since it allows a stronger surface low pressure to develop and supports the formation of a cutoff low in the middle troposphere. Though the local evaporation has a secondary role in this process, it helped the system to attain the observed intensity and subtropical characteristics. Therefore, both local and remote moisture sources provide the incipient subtropical cyclone with the horizontal temperature advection and convective activity necessary to its further development. |
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Climatology and numerical case study of moisture sources associated with subtropical cyclogenesis over the southwestern Atlantic Oceansubtropical cycloneslocal versus remote moisture sourcesLagrangian analysisconditions for cyclogenesisAn important feature during cyclogenesis is the availability of moisture to fuel the associated convective activity providing faster developments and more intense systems. In this work, an investigation of the role of local evaporation and remote water vapor transport prior to subtropical cyclogenesis in the southwestern South Atlantic (named RG1 region) is presented. Results were obtained analyzing the period from 1980 to 2015 with a Lagrangian particle dispersion model together with the ERA-Interim reanalysis. The northern sector of the Subtropical High in the South Atlantic Ocean stands out as the main source region of water vapor to the RG1, with the low-level northeasterly winds being responsible by moisture transport. An anomalous moisture transport from lower latitudes preceded the subtropical cyclogenesis events and provided the necessary water vapor to fuel the convective activity. A numerical case study using the Weather Research and Forecasting mesoscale model indicated that the remote moisture source is essential for subtropical cyclogenesis in RG1, since it allows a stronger surface low pressure to develop and supports the formation of a cutoff low in the middle troposphere. Though the local evaporation has a secondary role in this process, it helped the system to attain the observed intensity and subtropical characteristics. Therefore, both local and remote moisture sources provide the incipient subtropical cyclone with the horizontal temperature advection and convective activity necessary to its further development.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Univ Estadual Paulista, Dept Fis, Bauru, BrazilCtr Meteorol Bauru IPMET, Bauru, BrazilUniv Sao Paulo, IAG, Dept Ciencias Atmosfer, Sao Paulo, BrazilUniv Vigo, Fac Ciencias, Ephyslab, Orense, SpainUniv Estadual Paulista, Dept Fis, Bauru, BrazilCNPq: 238765/2012-1CNPq: 558121/2009-8CNPq: 307202/2011-9CNPq: 140839/2011-9CNPq: 481942/2013-0FAPESP: 2008/58101-9Amer Geophysical UnionUniversidade Estadual Paulista (Unesp)Ctr Meteorol Bauru IPMETUniversidade de São Paulo (USP)Univ VigoGozzo, L. F. [UNESP]Rocha, R. P. daGimeno, L.Drumond, A.2018-11-26T17:34:55Z2018-11-26T17:34:55Z2017-06-16info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article5636-5653application/pdfhttp://dx.doi.org/10.1002/2016JD025764Journal Of Geophysical Research-atmospheres. Washington: Amer Geophysical Union, v. 122, n. 11, p. 5636-5653, 2017.2169-897Xhttp://hdl.handle.net/11449/16291210.1002/2016JD025764WOS:000404131800007WOS000404131800007.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of Geophysical Research-atmospheresinfo:eu-repo/semantics/openAccess2024-04-25T17:40:20Zoai:repositorio.unesp.br:11449/162912Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:10:59.833428Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Climatology and numerical case study of moisture sources associated with subtropical cyclogenesis over the southwestern Atlantic Ocean |
title |
Climatology and numerical case study of moisture sources associated with subtropical cyclogenesis over the southwestern Atlantic Ocean |
spellingShingle |
Climatology and numerical case study of moisture sources associated with subtropical cyclogenesis over the southwestern Atlantic Ocean Gozzo, L. F. [UNESP] subtropical cyclones local versus remote moisture sources Lagrangian analysis conditions for cyclogenesis |
title_short |
Climatology and numerical case study of moisture sources associated with subtropical cyclogenesis over the southwestern Atlantic Ocean |
title_full |
Climatology and numerical case study of moisture sources associated with subtropical cyclogenesis over the southwestern Atlantic Ocean |
title_fullStr |
Climatology and numerical case study of moisture sources associated with subtropical cyclogenesis over the southwestern Atlantic Ocean |
title_full_unstemmed |
Climatology and numerical case study of moisture sources associated with subtropical cyclogenesis over the southwestern Atlantic Ocean |
title_sort |
Climatology and numerical case study of moisture sources associated with subtropical cyclogenesis over the southwestern Atlantic Ocean |
author |
Gozzo, L. F. [UNESP] |
author_facet |
Gozzo, L. F. [UNESP] Rocha, R. P. da Gimeno, L. Drumond, A. |
author_role |
author |
author2 |
Rocha, R. P. da Gimeno, L. Drumond, A. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Ctr Meteorol Bauru IPMET Universidade de São Paulo (USP) Univ Vigo |
dc.contributor.author.fl_str_mv |
Gozzo, L. F. [UNESP] Rocha, R. P. da Gimeno, L. Drumond, A. |
dc.subject.por.fl_str_mv |
subtropical cyclones local versus remote moisture sources Lagrangian analysis conditions for cyclogenesis |
topic |
subtropical cyclones local versus remote moisture sources Lagrangian analysis conditions for cyclogenesis |
description |
An important feature during cyclogenesis is the availability of moisture to fuel the associated convective activity providing faster developments and more intense systems. In this work, an investigation of the role of local evaporation and remote water vapor transport prior to subtropical cyclogenesis in the southwestern South Atlantic (named RG1 region) is presented. Results were obtained analyzing the period from 1980 to 2015 with a Lagrangian particle dispersion model together with the ERA-Interim reanalysis. The northern sector of the Subtropical High in the South Atlantic Ocean stands out as the main source region of water vapor to the RG1, with the low-level northeasterly winds being responsible by moisture transport. An anomalous moisture transport from lower latitudes preceded the subtropical cyclogenesis events and provided the necessary water vapor to fuel the convective activity. A numerical case study using the Weather Research and Forecasting mesoscale model indicated that the remote moisture source is essential for subtropical cyclogenesis in RG1, since it allows a stronger surface low pressure to develop and supports the formation of a cutoff low in the middle troposphere. Though the local evaporation has a secondary role in this process, it helped the system to attain the observed intensity and subtropical characteristics. Therefore, both local and remote moisture sources provide the incipient subtropical cyclone with the horizontal temperature advection and convective activity necessary to its further development. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-06-16 2018-11-26T17:34:55Z 2018-11-26T17:34:55Z |
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 |
http://dx.doi.org/10.1002/2016JD025764 Journal Of Geophysical Research-atmospheres. Washington: Amer Geophysical Union, v. 122, n. 11, p. 5636-5653, 2017. 2169-897X http://hdl.handle.net/11449/162912 10.1002/2016JD025764 WOS:000404131800007 WOS000404131800007.pdf |
url |
http://dx.doi.org/10.1002/2016JD025764 http://hdl.handle.net/11449/162912 |
identifier_str_mv |
Journal Of Geophysical Research-atmospheres. Washington: Amer Geophysical Union, v. 122, n. 11, p. 5636-5653, 2017. 2169-897X 10.1002/2016JD025764 WOS:000404131800007 WOS000404131800007.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal Of Geophysical Research-atmospheres |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
5636-5653 application/pdf |
dc.publisher.none.fl_str_mv |
Amer Geophysical Union |
publisher.none.fl_str_mv |
Amer Geophysical Union |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129400965693440 |