BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Rapid laundering of deep-ocean waters in an abyssal boundary curre
 nt  - Prof. Alberto Naveira Garabato (NOC\, Southampton)
DTSTART:20180427T100000Z
DTEND:20180427T110000Z
UID:TALK104308@talks.cam.ac.uk
CONTACT:Caroline Holmes
DESCRIPTION:The intensity and climatic impacts of oceanic overturning are 
 critically shaped by deep-ocean turbulent mixing\, which transforms cold w
 aters sinking at high latitudes into warmer\, shallower waters. The effect
 iveness of turbulent mixing in driving this transformation is jointly set 
 by two factors: the intensity of turbulence near topographic boundaries\, 
 and the rate at which well-mixed boundary waters are exchanged with the st
 ratified ocean interior. Yet while many near-boundary turbulent processes 
 have been documented\, little is known about the mechanisms regulating bou
 ndary – interior exchange. Here\, we use observations of the turbulent p
 roperties of a major outflow of Antarctic Bottom Water (AABW) from the Wed
 dell Sea to identify a previously-unrecognised mechanism of deep-ocean mix
 ing\, by which near-boundary turbulence and boundary – interior exchange
  are concurrently intensified. The observations included high-resolution f
 ine- and microstructure measurements across the AABW flow through the Orkn
 ey Passage\, and were obtained with ship-deployed instrumentation and the 
 autonomous underwater vehicle Autosub Long Range under the auspices of the
  U.K. DynOPO (Dynamics of the Orkney Passage Outflow) project. The corners
 tone of the new mechanism is the generation of submesoscale dynamical inst
 abilities by the flow of deep-ocean waters along a steep topographic bound
 ary. The dynamics and large-scale implications of this mode of mixing will
  be discussed.
LOCATION:British Antarctic Survey\, Innovation Centre\, Seminar Room 2
END:VEVENT
END:VCALENDAR