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SUMMARY:Recent Changes in Antarctic Sea Ice - Prof. John Turner\, British 
 Antarctic Survey
DTSTART:20141105T143000Z
DTEND:20141105T160000Z
UID:TALK55660@talks.cam.ac.uk
CONTACT:Dr. Pranab Deb
DESCRIPTION:Since 1979 Antarctic sea ice extent has increased throughout t
 he year\, with the total Antarctic annual mean extent having increased at 
 a rate of 1.5% per decade. However\, this overall increase masks large reg
 ional variations and especially an increase (decrease) over the Ross (Amun
 dsen-Bellingshausen) Sea. The mechanism or mechanisms responsible for the 
 increase in Antarctic SIE are not fully understood\, but the loss of strat
 ospheric ozone\, freshwater injection from the ice sheet\, ocean-ice feedb
 ack processes and ocean change have all been put forward as possibly playi
 ng a part. But the observed ice increase is dominated by change in the Ros
 s Sea where the ice extent is significantly correlated with the state of t
 he Amundsen Sea Low\, which has deepened in recent decades. However\, the 
 atmospheric circulation changes and sea ice increase may be within the bou
 nds of internal variability of the climate system. 
LOCATION:British Antarctic Survey\, Room 307
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