![]() ![]() However, the AR5 authors noted that high-resolution process models also tended to produce positive low cloud cover feedbacks. On the other hand, continuing low confidence was expressed in the sign of low cloud feedback because of a lack of strong observational constraints. Notably, the high cloud altitude feedback was deemed positive with high confidence due to supporting evidence from theory, observations, and high-resolution models. ![]() In this graphic, Zelinka and colleagues show the geographical breakdown of cloud radiative effect averaged over 15 years from CERES measurements: warming from the radiative effect of about 28W/m² – clouds absorb terrestrial radiation and reemit from near the top of the cloud where it is colder, this is like the “greenhouse” effect. ![]()
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