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Abyssal Upwelling and Downwelling Driven by Near-Boundary Mixing

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Show simple item record McDougall, Trevor J. Ferrari, Raffaele 2017-09-13T15:53:39Z 2017-09-13T15:53:39Z 2017-01 2016-04
dc.identifier.issn 0022-3670
dc.identifier.issn 1520-0485
dc.description.abstract A buoyancy and volume budget analysis of bottom-intensified mixing in the abyssal ocean reveals simple expressions for the strong upwelling in very thin continental boundary layers and the interior near-boundary downwelling in the stratified ocean interior. For a given amount of Antarctic Bottom Water that is upwelled through neutral density surfaces in the abyssal ocean (between 2000 and 5000 m), up to 5 times this volume flux is upwelled in narrow, turbulent, sloping bottom boundary layers, while up to 4 times the net upward volume transport of Bottom Water flows downward across isopycnals in the near-boundary stratified ocean interior. These ratios are a direct result of a buoyancy budget with respect to buoyancy surfaces, and these ratios are calculated from knowledge of the stratification in the abyss along with the assumed e-folding height that characterizes the decrease of the magnitude of the turbulent diapycnal buoyancy flux away from the seafloor. These strong diapycnal upward and downward volume transports are confined to a few hundred kilometers of the continental boundaries, with no appreciable diapycnal motion in the bulk of the interior ocean. en_US
dc.description.sponsorship National Science Foundation (U.S.) (Grant OCE-1233832) en_US
dc.language.iso en_US
dc.publisher American Meteorological Society en_US
dc.relation.isversionof en_US
dc.rights Article 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.source American Meteorological Society en_US
dc.title Abyssal Upwelling and Downwelling Driven by Near-Boundary Mixing en_US
dc.type Article en_US
dc.identifier.citation McDougall, Trevor J., and Ferrari, Raffaele. “Abyssal Upwelling and Downwelling Driven by Near-Boundary Mixing.” Journal of Physical Oceanography 47, 2 (February 2017): 261–283 © 2017 American Meteorological Society en_US
dc.contributor.department Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences en_US
dc.contributor.mitauthor Ferrari, Raffaele
dc.relation.journal Journal of Physical Oceanography en_US
dc.identifier.mitlicense PUBLISHER_POLICY en_US
dc.eprint.version Final published version en_US
dc.type.uri en_US
eprint.status en_US
dspace.orderedauthors McDougall, Trevor J.; Ferrari, Raffaele en_US
dspace.embargo.terms N en_US

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