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SUMMARY:Changing fast and slow: Hydrographic variability along the West An
 tarctic Peninsula Shelf during the recent sea ice extremes - Carlos Moffat
 \, University of Delaware
DTSTART:20240607T120000Z
DTEND:20240607T130000Z
UID:TALK212401@talks.cam.ac.uk
CONTACT:Dr Birgit Rogalla
DESCRIPTION:Antarctic sea ice extent has been anomalously low since 2016\,
  and reached extreme circumpolar minima in 2022/23. The causes of this cha
 nge are the subject of lively scientific debate\, including the relative r
 oles of atmospheric and ocean processes in modulating sea ice evolution. T
 he role of the ocean is particularly challenging to address due to the lac
 k of sustained oceanographic data under the ice. Here\, we examine the oce
 an's response and potential role in the extreme sea ice minima using data 
 collected by the Palmer Long-Term Ecological Research program and BAS alon
 g the West Antarctic Peninsula (WAP). This region has undergone dramatic c
 hange during many decades\, including atmospheric and deep ocean warming\,
  glacier retreat\, and sea ice loss even prior to the most recent minima. 
 Our observations show the extreme sea ice minimum followed after sustained
  wind anomalies that modulate ice advection\, and occurred as the upper oc
 ean stratification that typically prevents the ventilation of warm Circump
 olar Deep Water to the surface broke down. We also show that this event re
 verted decades of upper-ocean change along the WAP.
LOCATION:BAS Seminar Room 330b\; https://bas-ac-uk.zoom.us/j/98020253131
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