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SUMMARY:Water mass transformations and air-sea exchange in the Barents Sea
  - Marius Årthun (BAS)
DTSTART:20111021T100000Z
DTEND:20111021T110000Z
UID:TALK31890@talks.cam.ac.uk
CONTACT:Povl Abrahamsen
DESCRIPTION:Water mass transformation processes in the Barents Sea and the
 ir interannual to decadal variability (1948-2007) are studied using a regi
 onal coupled ice-ocean model and observational data. Variations in ocean h
 eat transport associated with the Atlantic inflow modulate both the Barent
 s Sea mean temperature (heat content) and the sea ice extent. Strong Atlan
 tic inflow and higher temperatures (heat content) are compensated by an in
 crease in the open ocean area (less sea ice) and larger oceanic heat loss\
 , establishing the Barents Sea as an adjustable and robust ocean cooler. C
 ooling of the Atlantic throughflow is an important processes for the water
  mass transformation within the Barents Sea and thus to the properties of 
 the water entering the Arctic Ocean. It is shown that ~70% of the warm inf
 low is transformed into cold\, dense water which is exported into the deep
  Arctic Ocean. However\, during anomalously warm periods like the recent d
 ecade cooling of the Atlantic water has not been sufficient and the temper
 ature of the outflowing waters has increased. This might have a profound i
 mpact on the heat transport to the Arctic Ocean. The increased ocean tempe
 ratures during the last decades have also lead to a reduced sea ice cover 
 in the Barents Sea\, i.e. an “Atlantification” of the region. 
LOCATION:British Antarctic Survey\, Room 187
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