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SUMMARY:Southern Ocean Circulation and Atmospheric pCO2 - David Munday (Un
 iversity of Oxford)
DTSTART:20101208T110000Z
DTEND:20101208T120000Z
UID:TALK27413@talks.cam.ac.uk
CONTACT:Povl Abrahamsen
DESCRIPTION:There is still no consensus for the mechanism responsible for 
 the amplitude of the glacial/interglacial atmospheric pCO2 change as measu
 red by Antarctic ice cores. As the major interconnection between the deep 
 ocean basins\, the Southern Ocean and its circulation is emerging as a pot
 ential candidate as\nthe driver for such change. Here we examine the relev
 ance of meso-scale ocean eddies to changing atmospheric pCO2. In particula
 r\, we reference the saturation effect of meso-scale eddies on the Souther
 n Ocean circulation. In the context of a coarse resolution sector model of
  the ocean\, we demonstrate that a crude parameterisation of changing meso
 -scale eddy activity with wind forcing attenuates the model's pCO2 respons
 e. Using a carbon pump decomposition\, we highlight the importance of cons
 idering air-sea disequilibrium\, carbonate formation\, and changes in ocea
 n temperature\, as well as soft tissue carbon in determining this pCO2 res
 ponse. We close with a look ahead to some early eddy-permitting calculatio
 ns at potentially multi-century to millennia time scales.
LOCATION:British Antarctic Survey\, Room 330B
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