On the Crossover of Boundary Currents in an Idealized Model of the Red Sea

Handle URI:
http://hdl.handle.net/10754/599048
Title:
On the Crossover of Boundary Currents in an Idealized Model of the Red Sea
Authors:
Zhai, Ping; Pratt, Larry J.; Bower, Amy
Abstract:
© 2015 American Meteorological Society. The west-to-east crossover of boundary currents has been seen in mean circulation schemes from several past models of the Red Sea. This study investigates the mechanisms that produce and control the crossover in an idealized, eddy-resolving numerical model of the Red Sea. The authors also review the observational evidence and derive an analytical estimate for the crossover latitude. The surface buoyancy loss increases northward in the idealized model, and the resultant mean circulation consists of an anticyclonic gyre in the south and a cyclonic gyre in the north. In the midbasin, the northward surface flow crosses from the western boundary to the eastern boundary. Numerical experiments with different parameters indicate that the crossover latitude of the boundary currents changes with f0, β, and the meridional gradient of surface buoyancy forcing. In the analytical estimate, which is based on quasigeostrophic, β-plane dynamics, the crossover is predicted to lie at the latitude where the net potential vorticity advection (including an eddy component) is zero. Various terms in the potential vorticity budget can be estimated using a buoyancy budget, a thermal wind balance, and a parameterization of baroclinic instability.
Citation:
Zhai P, Pratt LJ, Bower A (2015) On the Crossover of Boundary Currents in an Idealized Model of the Red Sea. Journal of Physical Oceanography 45: 1410–1425. Available: http://dx.doi.org/10.1175/jpo-d-14-0192.1.
Publisher:
American Meteorological Society
Journal:
Journal of Physical Oceanography
KAUST Grant Number:
USA 00002; KSA 00011; KSA 00011/02
Issue Date:
May-2015
DOI:
10.1175/jpo-d-14-0192.1
Type:
Article
ISSN:
0022-3670; 1520-0485
Sponsors:
We have benefited from talkingwith Tom Farrar, Jiayan Yang, Paola Rizzoli, and MikeSpall. This work is supported by Award USA 00002,KSA 00011, and KSA 00011/02 made by King AbdullahUniversity of Science and Technology (KAUST), byNational Science Foundation Grants OCE0927017,OCE1154641, and OCE85464100, and by the Woods HoleOceanographic Institution Academic Program Office.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorZhai, Pingen
dc.contributor.authorPratt, Larry J.en
dc.contributor.authorBower, Amyen
dc.date.accessioned2016-02-25T13:51:51Zen
dc.date.available2016-02-25T13:51:51Zen
dc.date.issued2015-05en
dc.identifier.citationZhai P, Pratt LJ, Bower A (2015) On the Crossover of Boundary Currents in an Idealized Model of the Red Sea. Journal of Physical Oceanography 45: 1410–1425. Available: http://dx.doi.org/10.1175/jpo-d-14-0192.1.en
dc.identifier.issn0022-3670en
dc.identifier.issn1520-0485en
dc.identifier.doi10.1175/jpo-d-14-0192.1en
dc.identifier.urihttp://hdl.handle.net/10754/599048en
dc.description.abstract© 2015 American Meteorological Society. The west-to-east crossover of boundary currents has been seen in mean circulation schemes from several past models of the Red Sea. This study investigates the mechanisms that produce and control the crossover in an idealized, eddy-resolving numerical model of the Red Sea. The authors also review the observational evidence and derive an analytical estimate for the crossover latitude. The surface buoyancy loss increases northward in the idealized model, and the resultant mean circulation consists of an anticyclonic gyre in the south and a cyclonic gyre in the north. In the midbasin, the northward surface flow crosses from the western boundary to the eastern boundary. Numerical experiments with different parameters indicate that the crossover latitude of the boundary currents changes with f0, β, and the meridional gradient of surface buoyancy forcing. In the analytical estimate, which is based on quasigeostrophic, β-plane dynamics, the crossover is predicted to lie at the latitude where the net potential vorticity advection (including an eddy component) is zero. Various terms in the potential vorticity budget can be estimated using a buoyancy budget, a thermal wind balance, and a parameterization of baroclinic instability.en
dc.description.sponsorshipWe have benefited from talkingwith Tom Farrar, Jiayan Yang, Paola Rizzoli, and MikeSpall. This work is supported by Award USA 00002,KSA 00011, and KSA 00011/02 made by King AbdullahUniversity of Science and Technology (KAUST), byNational Science Foundation Grants OCE0927017,OCE1154641, and OCE85464100, and by the Woods HoleOceanographic Institution Academic Program Office.en
dc.publisherAmerican Meteorological Societyen
dc.subjectBoundary currentsen
dc.subjectBuoyancyen
dc.subjectCirculation/Dynamicsen
dc.subjectOcean circulationen
dc.subjectOcean dynamicsen
dc.titleOn the Crossover of Boundary Currents in an Idealized Model of the Red Seaen
dc.typeArticleen
dc.identifier.journalJournal of Physical Oceanographyen
dc.contributor.institutionWoods Hole Oceanographic Institution, Woods Hole, United Statesen
dc.contributor.institutionNorth Carolina State University, Raleigh, United Statesen
kaust.grant.numberUSA 00002en
kaust.grant.numberKSA 00011en
kaust.grant.numberKSA 00011/02en
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.