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Can large oceanic vortices be stable?

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dc.contributor.author Benilov, Eugene
dc.date.accessioned 2018-04-11T10:41:49Z
dc.date.issued 2018
dc.identifier.uri http://hdl.handle.net/10344/6732
dc.description peer-reviewed en_US
dc.description.abstract Observations show that radii of oceanic eddies often exceed the Rossby radius of deformation, whereas theoretical studies suggest that such vortices should be unstable. The present paper resolves this paradox by presenting a wide class of large geostrophic vortices with a sign-definite gradient of potential vorticity (which makes them stable), in an ocean where the density gradient is mostly confined to a thin near-surface layer (which is indeed the case in the real ocean). The condition of a thin "active" layer is what makes the present work different from the previous theoretical studies and is of utmost importance. It turns out that without it, the joint requirement that a vortex be large and have a sign-definite potential vorticity gradient trivializes the problem by eliminating all vortices except nearly barotropic ones. en_US
dc.language.iso eng en_US
dc.publisher American Geophysical Union (AGU) en_US
dc.relation.ispartofseries Geophysical Research Letters;pp. 1948-1954
dc.relation.uri https://doi.org/10.1002/2017GL076939
dc.rights ©2018. American Geophysical Union. All Rights Reserved en_US
dc.subject stability en_US
dc.subject rings en_US
dc.subject instability en_US
dc.subject ageostrophy en_US
dc.subject vortex en_US
dc.subject layer en_US
dc.title Can large oceanic vortices be stable? en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.date.updated 2018-04-11T10:31:12Z
dc.description.version PUBLISHED
dc.identifier.doi 10.1002/2017GL076939
dc.date.embargoEndDate 2018-08-28
dc.embargo.terms 2018-08-28 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 2741127
dc.internal.copyrightchecked Yes
dc.identifier.journaltitle Geophysical Research Letters
dc.description.status peer-reviewed


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