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SUMMARY:Processes controlling the flux of Circumpolar Deep Water onto Anta
 rctic Shelves. - Andy Hogg\, Australian National University
DTSTART:20180611T130000Z
DTEND:20180611T140000Z
UID:TALK105808@talks.cam.ac.uk
CONTACT:Dr Emma Boland
DESCRIPTION:Oceanic transport across the Antarctic continental slope has a
  pivotal control on both the global meridional overturning circulation and
 \, via land-ice melt\, global sea level. Observations of ocean transport a
 cross the Antarctic continental slope are relatively scarce\, dominated by
  summer measurements and are focused in particular regions of interest\, s
 uch as the west Antarctic Peninsula. Numerical modelling of the circulatio
 n around the Antarctic margins is also difficult\, due to the high resolut
 ion required to simulate overflows and a mesoscale field with a typical Ro
 ssby radius of less than 5 km. As a result\, we know very little about wha
 t controls the cross-slope transports and if and how the transports of the
  different water masses are dynamically related to one another. Here\, we 
 use a global\, eddying ocean-sea ice model to quantify the spatial distrib
 ution of cross-slope Circumpolar Deep Water transport around Antarctica\, 
 to look at the influence of variations in wind stress forcing on the excha
 nge and to explore the connection between overflowing Dense Shelf Water (D
 SW) and onshore transport of Circumpolar Deep Water (CDW). We show results
  from both a circumpolar analysis\, and a local regional analysis in the R
 oss Sea\, to infer that DSW export places a major constraint on the locati
 on and magnitude of onshore CDW transport.
LOCATION:British Antarctic Survey\, Innovation Centre\, Seminar Room 2
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