Premium
Global warming due to increasing absorbed solar radiation
Author(s) -
Trenberth Kevin E.,
Fasullo John T.
Publication year - 2009
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2009gl037527
Subject(s) - environmental science , greenhouse gas , atmospheric sciences , global warming , climate change , greenhouse effect , cloud cover , cloud forcing , climate model , earth's energy budget , atmosphere (unit) , radiative transfer , radiation , climatology , meteorology , cloud computing , physics , geology , oceanography , quantum mechanics , computer science , operating system
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.