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SUMMARY:Boundary Layer Dynamics and Deep Ocean Mixing in Mid-Atlantic Ridg
 e Canyons - Dr Rebecca Dell\, Scripps Institution of Oceanography
DTSTART:20130904T120000Z
DTEND:20130904T130000Z
UID:TALK46961@talks.cam.ac.uk
CONTACT:Dr C. P.  Caulfield
DESCRIPTION:Physical oceanographers have known for several decades the tot
 al amount of abyssal mixing and upwelling required to balance the deep-wat
 er formation\, but are still working to understand the mechanisms and loca
 tions-how and where it happens.  From observational studies\, we know that
  areas of rough topography are important\, and the hundreds of Grand-Canyo
 n sized canyons that line mid-ocean ridges have particularly energetic mix
 ing.\n\nThis talk will present results from a fluid dynamics study of diff
 usive boundary layers interacting with varying topography\, showing mechan
 isms by which rough topography translates into energetic currents and mixi
 ng.  These boundary layer interactions can both increase the total amount 
 of mixing near topography and can provide a mechanism for exchanging mixed
  boundary water with the stratified far field.  These boundary layer proce
 sses may be a source of a dynamically important amount of abyssal upwellin
 g\, profoundly affecting predictions of the basin-scale circulation.
LOCATION:MR15
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