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dc.contributor.authorBrink, Kenneth H.  Concept link
dc.contributor.authorLentz, Steven J.  Concept link
dc.date.accessioned2010-10-19T17:54:08Z
dc.date.available2010-10-19T17:54:08Z
dc.date.issued2010-04
dc.identifier.citationJournal of Physical Oceanography 40 (2010): 621-635en_US
dc.identifier.urihttps://hdl.handle.net/1912/3959
dc.descriptionAuthor Posting. © American Meteorological Society, 2010. 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 Physical Oceanography 40 (2010): 621-635, doi:10.1175/2009JPO4266.1.en_US
dc.description.abstractIt is well known that along-isobath flow above a sloping bottom gives rise to cross-isobath Ekman transport and therefore sets up horizontal density gradients if the ocean is stratified. These transports in turn eventually bring the along-isobath bottom velocity, hence bottom stress, to rest (“buoyancy arrest”) simply by means of the thermal wind shear. This problem is revisited here. A modified expression for Ekman transport is rationalized, and general expressions for buoyancy arrest time scales are presented. Theory and numerical calculations are used to define a new formula for boundary layer thickness for the case of downslope Ekman transport, where a thick, weakly stratified arrested boundary layer results. For upslope Ekman transport, where advection leads to enhanced stability, expressions are derived for both the weakly sloping (in the sense of slope Burger number s = αN/f, where α is the bottom slope, N is the interior buoyancy frequency, and f is the Coriolis parameter) case where a capped boundary layer evolves and the larger s case where a nearly linearly stratified boundary layer joins smoothly to the interior density profile. Consistent estimates for the buoyancy arrest time scale are found for each case.en_US
dc.description.sponsorshipThis research was supported by the National Science Foundation Physical Oceanography program through Grant OCE 0647050.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Meteorological Societyen_US
dc.relation.urihttps://doi.org/10.1175/2009JPO4266.1
dc.subjectEkman pumping/transporten_US
dc.subjectBuoyancyen_US
dc.titleBuoyancy arrest and bottom Ekman transport. Part I : steady flowen_US
dc.typeArticleen_US
dc.identifier.doi10.1175/2009JPO4266.1


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