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SUMMARY:Antarctic sea-ice and the global climate - Dr. Claire Allen\, BAS
DTSTART:20130311T170000Z
DTEND:20130311T180000Z
UID:TALK40330@talks.cam.ac.uk
CONTACT:Lois Salem
DESCRIPTION:We know sea-ice is a critical component of the global climate 
 system as it has the capacity to greatly amplify and respond rapidly to sm
 all perturbations in climate through complex positive feedbacks on atmosph
 eric and oceanic systems. Efforts to accurately represent sea-ice in clima
 te models have met with limited success\, partly due to the complexity of 
 feedbacks associated with sea-ice and partly due to the paucity of sea-ice
  data on which the models are based. In particular\, very little is known 
 about the areal extent and persistence of Antarctic sea-ice prior to instr
 umental records. \n\nClaire Allen is a marine micropalaeontologist and pal
 aeoceanographer in the Chemistry and Past Climate Research Programme at th
 e British Antarctic Survey. Claire’s research focuses on the use of diat
 oms (marine algae) as proxies for ocean and climate conditions around Anta
 rctica and covers a range of timescales spanning from recent decades to gl
 acial-interglacial cycles.\n \nThe presentation will look at the role of s
 ea-ice in the global climate\, introduce the proxies used to reconstruct A
 ntarctic sea-ice and discuss what we can learn from reconstructing past ch
 anges in Antarctic sea-ice.
LOCATION:Harker Room 1\, Department of Earth Sciences
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