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SUMMARY:Global Warming and the Melting of the Arctic Ice - Professor Peter
  Wadhams\, University of Cambridge
DTSTART:20100224T170000Z
DTEND:20100224T180000Z
UID:TALK22703@talks.cam.ac.uk
CONTACT:Kerstin Enright
DESCRIPTION:The Arctic sea ice has been retreating and thinning for many d
 ecades under the influence of global warming\, but in the summer 2007 the 
 extent made a huge step downwards which led some scientists to predict tha
 t the summer ice would be gone in 5 years (since modified to 20-30). This 
 is a massive change with huge implications for the climate\, and it seems 
 to be brought about mainly by the thinning\, which allows the summer melt 
 to get rid of the ice altogether. To measure the thickeness in winter and 
 summer we have been working with Royal Navy submarines\, sailing under the
  ice with upwards looking sonars\, since 1971. Recently we have been using
  multibeam sonars which give full 3-D view of the ice underside.\n\nProfes
 sor Wadhams will discuss in his talk how these data are collected\, how th
 ey are analysed\, and how they are interpreted to give scientists key para
 meters which are needed to understand the decay rate of the ice.
LOCATION:Centre for Mathematical Sciences\, Clarkson Road\, Cambridge
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