Seasonal overturning circulation in the Red Sea: 1. Model validation and summer circulation

Handle URI:
http://hdl.handle.net/10754/552196
Title:
Seasonal overturning circulation in the Red Sea: 1. Model validation and summer circulation
Authors:
Yao, Fengchao ( 0000-0002-8218-0150 ) ; Hoteit, Ibrahim ( 0000-0002-3751-4393 ) ; Pratt, Larry J.; Bower, Amy S.; Zhai, Ping; Köhl, Armin; Gopalakrishnan, Ganesh
Abstract:
The overturning circulation in the Red Sea exhibits a distinct seasonally reversing pattern and is studied using high-resolution MIT general circulation model simulations. In the first part of this study, the vertical and horizontal structure of the summer overturning circulation and its dynamical mechanisms are presented from the model results. The seasonal water exchange in the Strait of Bab el Mandeb is successfully simulated, and the structures of the intruding subsurface Gulf of Aden intermediate water are in good agreement with summer observations in 2011. The model results suggest that the summer overturning circulation is driven by the combined effect of the shoaling of the thermocline in the Gulf of Aden resulting from remote winds in the Arabian Sea and an upward surface slope from the Red Sea to the Gulf of Aden set up by local surface winds in the Red Sea. In addition, during late summer two processes associated, respectively, with latitudinally differential heating and increased salinity in the southern Red Sea act together to cause the reversal of the contrast of the vertical density structure and the cessation of the summer overturning circulation. Dynamically, the subsurface northward pressure gradient force is mainly balanced by vertical viscosity resulting from the vertical shear and boundary friction in the Strait of Bab el Mandeb. Unlike some previous studies, the three-layer summer exchange flows in the Strait of Bab el Mandeb do not appear to be hydraulically controlled.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Seasonal overturning circulation in the Red Sea: 1. Model validation and summer circulation 2014, 119 (4):2238 Journal of Geophysical Research: Oceans
Journal:
Journal of Geophysical Research: Oceans
Issue Date:
Apr-2014
DOI:
10.1002/2013JC009004
Type:
Article
ISSN:
21699275
Additional Links:
http://doi.wiley.com/10.1002/2013JC009004
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorYao, Fengchaoen
dc.contributor.authorHoteit, Ibrahimen
dc.contributor.authorPratt, Larry J.en
dc.contributor.authorBower, Amy S.en
dc.contributor.authorZhai, Pingen
dc.contributor.authorKöhl, Arminen
dc.contributor.authorGopalakrishnan, Ganeshen
dc.date.accessioned2015-05-04T16:38:42Zen
dc.date.available2015-05-04T16:38:42Zen
dc.date.issued2014-04en
dc.identifier.citationSeasonal overturning circulation in the Red Sea: 1. Model validation and summer circulation 2014, 119 (4):2238 Journal of Geophysical Research: Oceansen
dc.identifier.issn21699275en
dc.identifier.doi10.1002/2013JC009004en
dc.identifier.urihttp://hdl.handle.net/10754/552196en
dc.description.abstractThe overturning circulation in the Red Sea exhibits a distinct seasonally reversing pattern and is studied using high-resolution MIT general circulation model simulations. In the first part of this study, the vertical and horizontal structure of the summer overturning circulation and its dynamical mechanisms are presented from the model results. The seasonal water exchange in the Strait of Bab el Mandeb is successfully simulated, and the structures of the intruding subsurface Gulf of Aden intermediate water are in good agreement with summer observations in 2011. The model results suggest that the summer overturning circulation is driven by the combined effect of the shoaling of the thermocline in the Gulf of Aden resulting from remote winds in the Arabian Sea and an upward surface slope from the Red Sea to the Gulf of Aden set up by local surface winds in the Red Sea. In addition, during late summer two processes associated, respectively, with latitudinally differential heating and increased salinity in the southern Red Sea act together to cause the reversal of the contrast of the vertical density structure and the cessation of the summer overturning circulation. Dynamically, the subsurface northward pressure gradient force is mainly balanced by vertical viscosity resulting from the vertical shear and boundary friction in the Strait of Bab el Mandeb. Unlike some previous studies, the three-layer summer exchange flows in the Strait of Bab el Mandeb do not appear to be hydraulically controlled.en
dc.relation.urlhttp://doi.wiley.com/10.1002/2013JC009004en
dc.rightsArchived with thanks to Journal of Geophysical Research: Oceansen
dc.titleSeasonal overturning circulation in the Red Sea: 1. Model validation and summer circulationen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJournal of Geophysical Research: Oceansen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Physical Oceanography; Woods Hole Oceanographic Institution; Woods Hole Massachusetts USAen
dc.contributor.institutionDepartment of Physical Oceanography; Woods Hole Oceanographic Institution; Woods Hole Massachusetts USAen
dc.contributor.institutionDepartment of Physical Oceanography; Woods Hole Oceanographic Institution; Woods Hole Massachusetts USAen
dc.contributor.institutionInstitut für Meereskunde; Zentrum für Meeres- und Klimaforschung; Universität Hamburg; Hamburg Germanyen
dc.contributor.institutionScripps Institution of Oceanography; Nierenberg Hall; San Diego California USAen
kaust.authorYao, Fengchaoen
kaust.authorHoteit, Ibrahimen
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