Other
Scientific paper
Apr 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3607706t&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 7, CiteID L07706
Other
14
Global Change: Atmosphere (0315, 0325), Global Change: Global Climate Models (3337, 4928), Atmospheric Processes: Clouds And Cloud Feedbacks, Atmospheric Processes: Radiative Processes
Scientific paper
Global climate models used in the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) are examined for the top-of-atmosphere radiation changes as carbon dioxide and other greenhouse gases build up from 1950 to 2100. There is an increase in net radiation absorbed, but not in ways commonly assumed. While there is a large increase in the greenhouse effect from increasing greenhouse gases and water vapor (as a feedback), this is offset to a large degree by a decreasing greenhouse effect from reducing cloud cover and increasing radiative emissions from higher temperatures. Instead the main warming from an energy budget standpoint comes from increases in absorbed solar radiation that stem directly from the decreasing cloud amounts. These findings underscore the need to ascertain the credibility of the model changes, especially insofar as changes in clouds are concerned.
Fasullo John T.
Trenberth Kevin E.
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