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dc.contributor.authorSeo, Hyodae  Concept link
dc.date.accessioned2017-10-18T15:51:00Z
dc.date.available2018-03-08T09:57:42Z
dc.date.issued2017-09-08
dc.identifier.citationJournal of Climate 30 (2017): 8061-8080en_US
dc.identifier.urihttps://hdl.handle.net/1912/9311
dc.descriptionAuthor Posting. © American Meteorological Society, 2017. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 30 (2017): 8061-8080, doi:10.1175/JCLI-D-16-0834.1.en_US
dc.description.abstractDuring the southwest monsoons, the Arabian Sea (AS) develops highly energetic mesoscale variability associated with the Somali Current (SC), Great Whirl (GW), and cold filaments (CF). The resultant high-amplitude anomalies and gradients of sea surface temperature (SST) and surface currents modify the wind stress, triggering the so-called mesoscale coupled feedbacks. This study uses a high-resolution regional coupled model with a novel coupling procedure that separates spatial scales of the air–sea coupling to show that SST and surface currents are coupled to the atmosphere at distinct spatial scales, exerting distinct dynamic influences. The effect of mesoscale SST–wind interaction is manifested most strongly in wind work and Ekman pumping over the GW, primarily affecting the position of GW and the separation latitude of the SC. If this effect is suppressed, enhanced wind work and a weakened Ekman pumping dipole cause the GW to extend northeastward, delaying the SC separation by 1°. Current–wind interaction, in contrast, is related to the amount of wind energy input. When it is suppressed, especially as a result of background-scale currents, depth-integrated kinetic energy, both the mean and eddy, is significantly enhanced. Ekman pumping velocity over the GW is overly negative because of a lack of vorticity that offsets the wind stress curl, further invigorating the GW. Moreover, significant changes in time-mean SST and evaporation are generated in response to the current–wind interaction, accompanied by a noticeable southward shift in the Findlater Jet. The significant increase in moisture transport in the central AS implies that air–sea interaction mediated by the surface current is a potentially important process for simulation and prediction of the monsoon rainfall.en_US
dc.description.sponsorshipThis work is supported by ONR (N00014-15-1-2588 and N00014-17-1-2398), NSF (OCE- 1419235), and NOAA (NA15OAR4310176).en_US
dc.language.isoen_USen_US
dc.publisherAmerican Meteorological Societyen_US
dc.relation.urihttps://doi.org/10.1175/JCLI-D-16-0834.1
dc.subjectIndian Oceanen_US
dc.subjectWind stressen_US
dc.subjectEkman pumpingen_US
dc.subjectMonsoonsen_US
dc.subjectAir-sea interactionen_US
dc.subjectCoupled modelsen_US
dc.titleDistinct influence of air–sea interactions mediated by mesoscale sea surface temperature and surface current in the Arabian Seaen_US
dc.typeArticleen_US
dc.description.embargo2018-03-08en_US
dc.identifier.doi10.1175/JCLI-D-16-0834.1


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