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SUMMARY:The Impact of Wintertime Sea Ice Anomalies on High Heat Flux Event
 s in the Iceland and Greenland Seas - Dr James Pope - British Antarctic Su
 rvey
DTSTART:20190315T133000Z
DTEND:20190315T140000Z
UID:TALK121381@talks.cam.ac.uk
CONTACT:Ben Johnson
DESCRIPTION:With the discovery of the subsurface North Icelandic Jet\, it 
 has become increasingly important to understand the formation of deep wate
 r in the Iceland and Greenland Seas. Two gyres (one in the Iceland Sea\, t
 he other in the Greenland Sea) were recently identified as potential regio
 ns of deep-water formation\, driven by large ocean-to-atmosphere heat flux
  events. Since the high heat flux events in these regions occur in the pro
 ximity of the sea ice edge\, a key question is the amount by which their m
 agnitude is being influenced by the ongoing (and future projected) retreat
  of sea ice. To answer this question\, a suite of nested climate model sim
 ulations\, using a range of sea ice extents and related sea surface temper
 ature (SST) anomalies in the Iceland and Greenland Seas\, were run to inve
 stigate how the retreat in winter sea ice is influencing high heat flux ev
 ents. For the Iceland Sea gyre\, a reduction in the strength of ocean-to-a
 tmosphere heat flux events was found under conditions of reduced sea ice e
 xtent. For the Greenland Sea gyre\, a weak sensitivity to sea ice extent a
 nomalies was found due to small variability in the adjacent sea ice edge a
 nd the compensating impact of relatively large co-variability in local SST
 s. In both gyres\, the role of large-scale atmospheric circulation pattern
 s is a key driver of the occurrence of high heat flux events.
LOCATION:Tilley Lecture Theater\, Department of Earth Sciences
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