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SUMMARY:The Weddell Polynya: when will it come back? - Casimir de Lavergne
 \, LOCEAN\, Sorbonne University
DTSTART:20200609T100000Z
DTEND:20200609T110000Z
UID:TALK142663@talks.cam.ac.uk
CONTACT:Louis Couston
DESCRIPTION:In the mid 1970s\, an area the size of Italy remained ice free
  for three winters in a row in the central Weddell Sea near Antarctica\, d
 espite atmospheric temperatures under -20ºC. This massive climatic anomal
 y\, called the Weddell Polynya\, has not recurred since. Recently\, eviden
 ce for an impact of anthropogenic emissions on such climatic events\, and 
 furtive openings of the winter ice pack in the region\, reignited interest
  in past and future occurrences of the Polynya. In this talk\, I will disc
 uss factors controlling polynya formation in the subpolar Southern Ocean a
 nd their projected evolution. Implications in the context of current obser
 ved trends in Southern Hemisphere climate will be evoked.
LOCATION:British Antarctic Survey\, Zoom
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