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SUMMARY:Interannual variability in Pacific Subantarctic Mode Water formati
 on regions -  Rachael Sanders (British Antarctic Survey)
DTSTART:20210127T140000Z
DTEND:20210127T150000Z
UID:TALK156262@talks.cam.ac.uk
CONTACT:Dr Irena Vankova
DESCRIPTION:Two modes of Subantarctic Mode Water (SAMW) form in the Pacifi
 c\, in regions of deep winter mixed layers\, on the northern side of the S
 ubantarctic Front. Each water mass has experienced significant interannual
  variability in recent years. In this study\, mixed layer temperature and 
 salinity budgets were computed in the formation regions\, to determine the
  drivers of variability in the mixed layer properties. The dominant driver
 s are shown to be surface buoyancy fluxes\, horizontal advection and entra
 inment. While surface buoyancy fluxes set the depth of the winter mixed la
 yer\, strong advection in the lead up to the deepening of the mixed layer 
 also drives strong variability in mixed layer salinity. Salt advection in 
 each water mass formation region is strongly correlated with sea ice area 
 in the northern Ross Sea\, at lags of up to two years. Correlation is also
  found between salt advection in the southeast Pacific SAMW formation regi
 on and sea ice area in the northern Amundsen/Bellingshausen Sea\, at lags 
 of up to six months.\n
LOCATION:British Antarctic Survey\, Zoom
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