BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:A new Asymmetric Mode of internal variability for the Global Ocean
  - Nathan Bindoff (University of Tasmania)
DTSTART:20230703T140000Z
DTEND:20230703T150000Z
UID:TALK202669@talks.cam.ac.uk
CONTACT:Dr Michael Haigh
DESCRIPTION:Global ocean heat distribution is driven by both internal and 
 external factors. Among internal factors\, the climate modes such as India
 n Ocean Dipole (IOD)\, subsurface Dipole Mode (SDM) of the Indian Ocean\, 
 El Nino Southern Oscillation (ENSO)\, Interdecadal Pacific Oscillation (IP
 O) over the Pacific\, North Atlantic Oscillation (NAO)\, Atlantic Multidec
 adal Oscillation (AMO) over the Atlantic etc. have a substantial impact on
  global ocean heat transport between the hemispheres. However\, the combin
 ation of existing climate modes is not enough to explain the total variabi
 lity in the global ocean internal to the system. By analysing 30 CMIP5 pre
 -Industrial control simulations our study suggests that global ocean shows
  an internal climate mode named as Asymmetric mode (ASYM) that drives the 
 heat transport (and mass) between the hemispheres. The ASYM is characteris
 ed as the changes in the sea level and ocean heat content of the global oc
 ean with sea level high (low) and warming (cooling) in the southern (north
 ern) hemisphere and vice-versa. ASYM is unique as it is defined over the g
 lobal ocean and expressed in terms of sea level and ocean heat content\, i
 n contrast to other climate modes which are largely defined based on sea s
 urface temperature and regional ocean. \n\nOur preliminary analysis sugges
 ts that the periodicity of ASYM varies from interannual to decadal to mult
 idecadal timescales. Climate parameters such as surface air temperature\, 
 surface winds\, precipitation\, sea surface salinity and sea level pressur
 e are observed to be closely associated with ASYM.  The footprint in Antar
 ctica and Southern Ocean is large and offers the potential explanation for
  the observed acceleration of the ACC (and other impacts) and rapid warmin
 g of the Southern Ocean (in excess of human driven climate change).\n
LOCATION:BAS Seminar Room 1\; https://ukri.zoom.us/j/92110296123
END:VEVENT
END:VCALENDAR