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SUMMARY: Asymmetry in the seasonal cycle of Antarctic sea ice - Lettie Roa
 ch\, Columbia University
DTSTART:20221109T150000Z
DTEND:20221109T160000Z
UID:TALK192728@talks.cam.ac.uk
CONTACT:Dr Michael Haigh
DESCRIPTION:Changes in Antarctic sea ice have wide-ranging implications fo
 r climate\, ocean circulation and marine ecosystems. In this talk\, I will
  give a brief overview of Antarctic sea ice and its representation in stat
 e-of-the-art climate models. Results from recent coupled model experiments
  demonstrate the key role that winds have played in the recent trends and 
 large interannual variability of Antarctic sea ice extent. Despite this la
 rge interannual variability\, the seasonal cycle of Antarctic sea ice exte
 nt is remarkably consistent in shape. The mean seasonal cycle is asymmetri
 c\, with the period of ice retreat being nearly two months shorter than th
 e period of ice advance. Using a range of climate models of varying comple
 xity\, I show that the asymmetry has a simple physical explanation that is
  markedly different from those proposed in previous studies. I will end by
  discussing some implications for the seasonality of Arctic sea ice.
LOCATION:BAS Seminar Room 1\; https://ukri.zoom.us/j/92279923623
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