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SUMMARY:Polar Oceans Seminar Talk - Helen Shea - Helen Shea - Monash Unive
 rsity
DTSTART:20260304T140000Z
DTEND:20260304T150000Z
UID:TALK241672@talks.cam.ac.uk
CONTACT:Katherine Turner
DESCRIPTION:Next week we have a seminar from visiting PhD student Helen Sh
 ea (Monash University) who will be talking about Contrasting regional ocea
 n processes sustaining low Antarctic sea ice coverage. So come along to Se
 minar Room 1 at 2pm!\n\nAbstract:\nAntarctic sea ice increased for decades
 \, peaked in 2014\, then sharply declined in 2016 and has remained general
 ly low since. This decline matters because Antarctic sea ice regulates glo
 bal climate\, influences ocean circulation\, and supports ecosystems. Ocea
 n-sea ice interactions are likely contributing to this low sea ice state\,
  with upper ocean stratification central in sea ice formation and melt. An
 alysis of ocean properties from ORAS5 reanalysis finds the low sea ice per
 iod coincides with subsurface warming and stronger stratification in most 
 Antarctic regions. Changes occurring in the Ross Sea are distinct from oth
 er regions\, with a cooler and fresher subsurface and weakened stratificat
 ion occurring during the low sea ice period. We suggest that the Ross Sea 
 differences are linked to the presence of the Ross Gyre and an ocean-sea i
 ce feedback. These findings highlight the importance of region-specific oc
 ean processes in influencing Antarctic sea ice variability and its future 
 under climate change.
LOCATION:BAS Seminar Room 1
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