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SUMMARY:Southern Ocean Centennial Oscillations and Response to Climate For
 cing - Jonathan Rosser\; BAS / LSE
DTSTART:20241211T103000Z
DTEND:20241211T113000Z
UID:TALK224386@talks.cam.ac.uk
CONTACT:Dr Birgit Rogalla
DESCRIPTION:Key features of the Southern Ocean (such as the Antarctic Circ
 umpolar Current and meridional overturning circulation) show centennial os
 cillations in many of the CMIP6 models. These oscillations can be linked t
 o changes in convection and formation of dense water which go on to influe
 nce the state of the whole Southern Ocean. \nThis seminar will briefly dis
 cuss the range of behaviour seen in the pre-industrial control runs for th
 ese models\, before examining the response of Southern Ocean centennial va
 riability to climate forcing. The response to a range of CMIP6 warming sce
 narios will be examined\, demonstrating a cessation of the oscillations an
 d a significant reduction in the production of dense water\, even in weake
 r forcing scenarios. These changes will then be examined further through n
 ovel idealised forcing simulations with gradual 1% annual increases in CO2
  as well as abrupt warming and cooling scenarios. There will also be a dis
 cussion of how these oscillations affect our future projections and how we
  should consider the uncertainty in these projections.
LOCATION:BAS Seminar Room 330b\; https://bas-ac-uk.zoom.us/j/96257339921
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