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SUMMARY:Transient responses of the Southern Ocean to climate change - Andy
  Hogg (Australian National University)
DTSTART:20130611T100000Z
DTEND:20130611T110000Z
UID:TALK45234@talks.cam.ac.uk
CONTACT:Dr Andrew Meijers
DESCRIPTION:Circulation in the Southern Ocean is driven by a combination o
 f wind and heat/freshwater fluxes\, which conspire to generate both the An
 tarctic Circumpolar Current and the meridional overturning circulation (bo
 th moderated by a vigorous eddy field). Climate change is likely to cause 
 both both warming and freshening in this region\, as well as enhancing win
 d stress. Disentangling the individual effects of each of these surface fo
 rcings may have on individual components of the circulation is proving a d
 ifficult task. In this talk I will show recent progress from idealised num
 erical models which will be used to argue that:\n# the sensitivity of the 
 overturning circulation response to eddies differs from the circumpolar tr
 ansport\; and\n# the abyssal overturning cell is weakening in response to 
 a combination of freshening and warming.\n\nApplying these results to rece
 nt analyses of the CMIP5 suite of simulations allows us to further constra
 in future Southern Ocean responses to climate change.
LOCATION:British Antarctic Survey\, Room 330B
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