Estimating Climate Sensitivity Report of a Workshop (2003) / Chapter Skim
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Climate Feedbacks
Climate Feedbacks
Pages 11-16
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From page 11... ...
In these expedients, they changed the global average ocean surface temperature and examined the resulting shortwave and longwave feedbacks (Coleman and McAvaney, 1997~. It was found that the N CAR and GFDL models have very similar clear-sky feedbacks (i.e., changes in atmospheric water vapor and temperature lapse rate)
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From page 12... ...
simulations.5 VENI`ATCHALAM RAMASWAMY Venkatchalam Ramaswamy discussed the results of a study to examine water vapor feedbacks in He Hadley and GFDL models, in comparison with available observations (Allen et al., 2002~. Both models were input with the same reported sea surface temperatures and run over He specified period.
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From page 13... ...
JOYCE PENNER Joyce Penner, from the University of Michigan, discussed feedbacks and uncertainties related to aerosol v Determining climate sensitivity by fitting the observational temperature record requires specifying radiative forcing from aerosols. Most climate models currently consider only forcing from fossil Mel sulfate aerosols.
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From page 14... ...
have not been included in the climate models. Discussion Ar~drono~a: If biomass burning aerosols were included in simple climate models, Men aerosol radiative forcing patterns would become more symmetric (since biomass burning aerosols are not concentrated in We northern midlatitudes like the fossil Mel aerosols)
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From page 15... ...
In all models there seems to be a fairly linear relationship between rise in global average temperature and reduction in the aerial extent of sea ice cover. This relationship is scenario independent, which implies that sea ice responds rapidly to climate warming and Gus provides a useful rapid feedback diagnostic.
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From page 16... ...
Discussion B~~ One co-Ecabon of modeling He dbedo emus is Hat ~ He sawn sea He is open masked cloudy Cab emceed reduces He Redo feedback.
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