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SUMMARY:Regional modelling of ocean processes in the Bellingshausen Sea - 
 Paul Holland\, British Antarctic Survey
DTSTART:20081028T110000Z
DTEND:20081028T120000Z
UID:TALK14717@talks.cam.ac.uk
CONTACT:Robert Bingham
DESCRIPTION:In the vicinity of the Antarctic Peninsula observations show d
 iminishing sea ice and a rapid warming of atmosphere and ocean.  These cha
 nges have led to the collapse of ice shelves and retreat\, acceleration\, 
 and thinning of inland ice.  However\, ocean observations in the centre of
  the nearby Bellingshausen Sea are spatially and temporally coarse.  In th
 is study\, ocean and sea ice models forced by atmospheric reanalyses are u
 sed to model ocean processes in the Bellingshausen Sea for the years 1979-
 -2007.  The model elucidates flow features in the region and predicts the 
 basal melting of nearby ice shelves.  Ocean conditions are found to be les
 s variable than in the nearby Amundsen Sea\, which is situated closer to l
 ocal foci of annual and interannual atmospheric variability.  Melt rates b
 eneath George VI Ice Shelf are investigated in some detail\, concluding th
 at the ice shelf may have been melting out of balance (and therefore thinn
 ing) for decades.  The melt rate contains significant interannual variabil
 ity that the model links to variation in local sea ice conditions.  This s
 tands in contrast to the Amundsen Sea\, where it has been suggested that i
 ce shelf melting is controlled by the transport of Circumpolar Deep Water 
 onto the continental shelf.
LOCATION:British Antarctic Survey\, Room 307
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