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SUMMARY:Interconnectivity between volume transports through Arctic straits
  - Agatha de Boer\, Stockholm University
DTSTART:20180705T130000Z
DTEND:20180705T140000Z
UID:TALK101938@talks.cam.ac.uk
CONTACT:Dr Maria Vittoria Guarino
DESCRIPTION:Arctic heat and freshwater budgets are highly sensitive to vol
 ume transports through the Arctic-Subarctic straits. Here we study the int
 erconnectivity of volume transports through Arctic Straits in three models
 \; two coupled global atmosphere-ocean models\, one with a third-degree ho
 rizontal ocean resolution (HiGEM1.1) and one with a twelfth-degree horizon
 tal ocean resolution (HadGEM3)\, and one ocean-only model with an idealise
 d polar basin (tenth-degree horizontal resolution). The two global climate
  models indicate that there is a strong anti-correlation between the Berin
 g Strait throughflow and the transport through the Nordic Seas\, a second 
 strong anti-correlation between the Nordic Seas transport and that through
  the Canadian Artic Archipelago (CAA)\, and a third strong anti-correlatio
 n is found between the Fram Strait and the Barents Sea throughflows. Analy
 sis of the sea level pressure and sea surface height fields suggest that a
 re least some part of the strait correlations is due to the strait transpo
 rts being coincidentally driven by large scale atmospheric forcing pattern
 s. However\, there is also be a role for fast wave adjustments of some str
 aits flows to perturbations in other straits since it is impossible that t
 he atmospheric forcing of individual strait flows will lead to near-mass b
 alance fortuitously every year. Simple experiments in an idealised ocean m
 odel (NEMO) suggest that perturbations in the Bering Strait are compensate
 d preferentially in the Nordic Seas due to the wide shelf of the Canadian 
 Archipelago and the depth of the Fram Strait. 
LOCATION:British Antarctic Survey\, Seminar Room 187
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