Wintertime circulation off southeast Australia: Strong forcing by the East Australian Current

Detalhes bibliográficos
Autor(a) principal: Cirano, Mauro
Data de Publicação: 2005
Outros Autores: Middleton, John F.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/13524
Resumo: p.1-12
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spelling Cirano, MauroMiddleton, John F.2013-11-03T14:02:11Z2013-11-03T14:02:11Z20050148-0227http://repositorio.ufba.br/ri/handle/ri/13524v.110 n. 12p.1-12Numerical results and observations are used to examine the sub–weather band wintertime circulation off the eastern shelf slope region between Tasmania and Cape Howe. The numerical model is forced using wintertime-averaged atmospheric fluxes of momentum, heat, and freshwater and using transports along open boundaries that are obtained from a global ocean model. The boundary to the north of Cape Howe has a prescribed transport of 17 Sv, which from available observations represents strong forcing by the East Australian Current (EAC). Nonetheless, the model results are in qualitative (and quantitative) agreement with several observational studies. In accord with observations, water within Bass Strait is found to be driven to the east and north with speeds of up to 30 cm s−1 off the southeast Victorian coast. The water is colder and denser than that found farther offshore, which is associated with the southward flowing (warm) EAC. In agreement with observations the density difference between the two water masses is about 0.6 kg m−3 and leads to a cascade of dense Bass Strait water to depths of 300 m and as a plume that extends 5–10 km in the cross-shelf direction. Typical vertical velocities of the model cascade are 20 m d−1. Along-isobath currents become bottom intensified with speeds of 20 cm s−1 or so at depths of 200 m. The EAC is found to flow along isobaths and to the south and then west past Tasmania with speeds of up to 20 cm s−1. Mesoscale eddies grow to diameters of 100 km (speeds <40 cm s−1), and in accord with observations a semipermanent anticyclonic eddy is found to the east of Cape Howe.Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2013-09-09T16:47:36Z No. of bitstreams: 1 jgrc9948.pdf: 1912381 bytes, checksum: 3fec4245c4545644590babd3bba934e9 (MD5)Approved for entry into archive by Rodrigo Meirelles (rodrigomei@ufba.br) on 2013-11-03T14:02:11Z (GMT) No. of bitstreams: 1 jgrc9948.pdf: 1912381 bytes, checksum: 3fec4245c4545644590babd3bba934e9 (MD5)Made available in DSpace on 2013-11-03T14:02:11Z (GMT). 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dc.title.pt_BR.fl_str_mv Wintertime circulation off southeast Australia: Strong forcing by the East Australian Current
dc.title.alternative.pt_BR.fl_str_mv Journal of Geophysical Research
title Wintertime circulation off southeast Australia: Strong forcing by the East Australian Current
spellingShingle Wintertime circulation off southeast Australia: Strong forcing by the East Australian Current
Cirano, Mauro
Australian circulation
Bass Strait cascade
East Australian Current index
title_short Wintertime circulation off southeast Australia: Strong forcing by the East Australian Current
title_full Wintertime circulation off southeast Australia: Strong forcing by the East Australian Current
title_fullStr Wintertime circulation off southeast Australia: Strong forcing by the East Australian Current
title_full_unstemmed Wintertime circulation off southeast Australia: Strong forcing by the East Australian Current
title_sort Wintertime circulation off southeast Australia: Strong forcing by the East Australian Current
author Cirano, Mauro
author_facet Cirano, Mauro
Middleton, John F.
author_role author
author2 Middleton, John F.
author2_role author
dc.contributor.author.fl_str_mv Cirano, Mauro
Middleton, John F.
dc.subject.por.fl_str_mv Australian circulation
Bass Strait cascade
East Australian Current index
topic Australian circulation
Bass Strait cascade
East Australian Current index
description p.1-12
publishDate 2005
dc.date.issued.fl_str_mv 2005
dc.date.accessioned.fl_str_mv 2013-11-03T14:02:11Z
dc.date.available.fl_str_mv 2013-11-03T14:02:11Z
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://repositorio.ufba.br/ri/handle/ri/13524
dc.identifier.issn.none.fl_str_mv 0148-0227
dc.identifier.number.pt_BR.fl_str_mv v.110 n. 12
identifier_str_mv 0148-0227
v.110 n. 12
url http://repositorio.ufba.br/ri/handle/ri/13524
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.pt_BR.fl_str_mv http://dx.doi.org/ 10.1029/2004JC002855
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
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