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SUMMARY:Enhanced turbulent mixing driven by wind shear alignment in the oc
 ean - Tom Rippeth (Bangor University)
DTSTART:20140219T140000Z
DTEND:20140219T150000Z
UID:TALK49791@talks.cam.ac.uk
CONTACT:Dr Dan Jones
DESCRIPTION:The surface mixed layer of the ocean represents a critical int
 erface in the Earth System across which heat\, momentum and trace gases ar
 e exchanged. The processes setting the surface mixed layer depth and contr
 olling diapycnal fluxes\, at the base of the surface mixed layer\, are imp
 ortant in determining the air-sea fluxes by influencing the sea surface te
 mperature and pCO2. Here we report on recent work to identify and quantify
  the role of near-inertial oscillations in driving diapycnal mixing in tem
 perate shelf seas\, under sea ice in polar seas\, and in the open ocean. A
  shear-spike mechanism is invoked in which  the alignment of the wind vect
 or with the shear vector can result in shear instability\, with velocity m
 icrostructure estimates of diapycnal mixing indicating an enhancement of t
 he mixing rate by 3-4 times.  
LOCATION:British Antarctic Survey\, Room 307
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