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SUMMARY:Boundary Upwelling of Antarctic Bottom Water by Topographic Turbul
 ence - Lois Baker\, University of Edinburgh
DTSTART:20231106T130000Z
DTEND:20231106T140000Z
UID:TALK208177@talks.cam.ac.uk
CONTACT:Prof. John R. Taylor
DESCRIPTION:The lower cell of the meridional overturning circulation (MOC)
  is sourced by dense Antarctic Bottom Waters (AABW)\, which form and sink 
 around Antarctica and subsequently fill the abyssal ocean. For the MOC to 
 'overturn'\, these dense waters must upwell via mixing with lighter waters
  above. Here\, we investigate the processes underpinning such mixing\, and
  the resulting water mass transformation\, using an observationally forced
 \, high-resolution numerical model of the Drake Passage in the Southern Oc
 ean. In the Drake Passage\, the mixing of dense AABW formed in the Weddell
  Sea with lighter deep waters transported from the Pacific Ocean by the An
 tarctic Circumpolar Current is catalysed by energetic flows impinging on r
 ough topography. We find that multiple topographic interaction processes f
 acilitate the mixing of the two water masses\, ultimately resulting in the
  upwelling of waters with neutral density greater than 28.19\, and the dow
 nwelling of the lighter waters above.
LOCATION:MR5\, CMS
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