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SUMMARY:The role of ocean heat transport from the Atlantic into the Arctic
  Ocean on sea ice variability - David Schroeder\, University of Reading
DTSTART:20220608T130000Z
DTEND:20220608T140000Z
UID:TALK169241@talks.cam.ac.uk
CONTACT:Dr. Shenjie Zhou
DESCRIPTION:The decrease of Arctic sea ice affects the future climate in t
 he Arctic and beyond. Therefore\, it is important to understand the driver
 s of sea ice variability and trend. Available observations of the Atlantic
  inflow to the Barents Sea show a strong negative correlation with sea ice
  area and extent in Barents Sea over the period from 1997 to 2010. Several
  observational and model studies conclude that the ocean heat transport is
  the main driver for sea ice decrease and variability. In our study\, we a
 nalyse a historical 9 member simulation with the UK Earth System Model (UK
 ESM1) performed for CMIP6 from 1850 to 2014 and ocean – sea ice simulati
 ons forced by atmospheric reanalysis data with the same ocean model NEMOv3
 .6 and sea ice model CICEv5.1. Over the whole 165y period\, the UKESM simu
 lation confirms previous findings showing that the ocean heat transport be
 tween Norway and Svalbard (Barents Sea Opening\; BSO) is strongly correlat
 ed with the winter sea ice extent in the Barents Sea. However\, this corre
 lation is only caused by decadal variability and there is no correlation i
 n the shorter atmospheric-forced simulations. All simulations show a stron
 g correlation between the annual mean incoming longwave radiation with win
 ter sea ice extent and thickness. It is evident that the atmospheric circu
 lation is the main driver of sea ice winter variability: Southerly winds p
 ush sea ice northwards\, advect warm and moist air into the Barents Sea\, 
 increase the incoming longwave radiation and the melting from top and\, th
 us\, cause a low sea ice extent. 
LOCATION:https://ukri.zoom.us/j/98387914302\; BAS seminar room 1
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