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SUMMARY:Mechanisms for the land/sea warming contrast exhibited by simulati
 ons of climate change - Dr Manoj Joshi\, NCAS Climate\, University of Read
 ing
DTSTART:20091109T141500Z
DTEND:20091109T151500Z
UID:TALK19733@talks.cam.ac.uk
CONTACT:Dr Francis Pope
DESCRIPTION:The land/sea warming contrast is a phenomenon whereby large ar
 eas of the land surface at most latitudes undergo temperature changes grea
 ter than the surrounding oceans when climate warms. In equilibrium situati
 ons the land/sea contrast is mainly associated with the hydrological cycle
  and local feedbacks in the boundary layer over land\, with direct radiati
 ve forcing playing a smaller role. Surprisingly\, in transient simulations
 \, the effect of the differing thermal inertias of land and ocean is minor
 \, and land/sea contrasts in such simulations are similar to their equilib
 rium counterparts. A conceptual model is described that can explain the la
 nd/sea contrast: the non-linearity of the Clausius-Clapeyron relationship 
 between vapour pressure and temperature plays a critical role in this mode
 l. The sensitivity of the land/sea contrast to physical parameters\, resol
 ution and imposed radiative forcing in climate models is discussed. Finall
 y by popular demand I'll talk a little about the relationship between The 
 El Nino Southern Oscillation (ENSO) and Ashes cricket series results in Au
 stralia.\n\n_The picture is projected future warming based on three emissi
 ons scenarios (low\, medium\, and high growth)- source: NASA Earth Observa
 tory_
LOCATION:Unilever Lecture Theatre\, Department of Chemistry
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