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SUMMARY:Southern Ocean eddies and the ocean carbon cycle - David Munday (U
 niversity of Oxford)
DTSTART:20130626T100000Z
DTEND:20130626T110000Z
UID:TALK44016@talks.cam.ac.uk
CONTACT:Dr Andrew Meijers
DESCRIPTION:The Southern Ocean and the Antarctic Circumpolar Current\, its
  principle zonal current system\, are typically viewed as being of global 
 significance to the Earth’s climate. Furthermore\, the close relationshi
 p between Antarctic temperature and atmospheric carbon dioxide suggests an
  important role for the Southern Ocean in glacial cycles. It has been hypo
 thesised that changes in Southern Ocean wind stress might drive the glacia
 l/inter-glacial cycle in carbon dioxide. However\, the resolution of the m
 esoscale eddy field\, which is of dynamical importance to the Southern Oce
 an\, fundamentally alters the sensitivity of the Southern Ocean circulatio
 n to changes in wind stress in numerical models. Recent eddy-resolving mod
 el results indicate that in the presence of a vigorous eddy field\, the se
 nsitivity of Southern Ocean upwelling and global stratification to changes
  in Southern Ocean wind stress may be low. This may limit the sensitivity 
 of the climate system as a whole to changes in Southern Ocean wind stress\
 , by limiting the change in ventilation of abyssal carbon reservoirs. Nume
 rical experiments with an idealised mode configuration indicate that the e
 ddy field not only alters the sensitivity of the physical circulation\, bu
 t also the ocean carbon storage and its decomposition into physical and bi
 ological storage terms.
LOCATION:British Antarctic Survey\, Room 330B
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