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dc.contributor.authorNaveira Garabato, Alberto C.
dc.contributor.authorPolzin, Kurt L.
dc.contributor.authorFerrari, Raffaele
dc.contributor.authorZika, Jan D.
dc.contributor.authorForryan, Alexander
dc.date.accessioned2017-04-21T15:21:09Z
dc.date.available2017-04-21T15:21:09Z
dc.date.issued2016-01
dc.date.submitted2015-02
dc.identifier.issn0022-3670
dc.identifier.issn1520-0485
dc.identifier.urihttp://hdl.handle.net/1721.1/108339
dc.description.abstractThe relative roles of isoneutral stirring by mesoscale eddies and dianeutral stirring by small-scale turbulence in setting the large-scale temperature–salinity relation of the Southern Ocean against the action of the overturning circulation are assessed by analyzing a set of shear and temperature microstructure measurements across Drake Passage in a “triple decomposition” framework. It is shown that a picture of mixing and overturning across a region of the Antarctic Circumpolar Current (ACC) may be constructed from a relatively modest number of microstructure profiles. The rates of isoneutral and dianeutral stirring are found to exhibit distinct, characteristic, and abrupt variations: most notably, a one to two orders of magnitude suppression of isoneutral stirring in the upper kilometer of the ACC frontal jets and an order of magnitude intensification of dianeutral stirring in the subpycnocline and deepest layers of the ACC. These variations balance an overturning circulation with meridional flows of O(1) mm s⁻¹ across the ACC’s mean thermohaline structure. Isoneutral and dianeutral stirring play complementary roles in balancing the overturning, with isoneutral processes dominating in intermediate waters and the Upper Circumpolar Deep Water and dianeutral processes prevailing in lighter and denser layers.en_US
dc.language.isoen_US
dc.publisherAmerican Meteorological Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1175/jpo-d-15-0025.1en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAmerican Meteorological Societyen_US
dc.titleA Microscale View of Mixing and Overturning across the Antarctic Circumpolar Currenten_US
dc.typeArticleen_US
dc.identifier.citationNaveira Garabato, Alberto C.; Polzin, Kurt L.; Ferrari, Raffaele; Zika, Jan D. and Forryan, Alexander. “A Microscale View of Mixing and Overturning Across the Antarctic Circumpolar Current.” Journal of Physical Oceanography 46, no. 1 (January 2016): 233–254. © American Meteorological Societyen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciencesen_US
dc.contributor.mitauthorFerrari, Raffaele
dc.relation.journalJournal of Physical Oceanographyen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsNaveira Garabato, Alberto C.; Polzin, Kurt L.; Ferrari, Raffaele; Zika, Jan D.; Forryan, Alexanderen_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0002-3736-1956
mit.licensePUBLISHER_POLICYen_US


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