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Cooling effect of clouds ‘underestimated’ by climate models, says new study Clouds could have a greater cooling effect on the planet than climate models currently suggest, according to new research. The paper, published in Nature Climate Change, aims to correct a “long-standing” and “unaddressed” problem in climate modelling – namely, that existing models simulate too much rainfall from clouds and, therefore, underestimate their lifespan and cooling effect. The authors have updated an existing climate model with a more realistic simulation of rainfall from “warm” clouds – those that contain water only, rather than a combination of water and ice. They find that this update makes the “cloud lifetime feedback” – a process in which warmer temperatures increase the lifespan of clouds – almost three times bigger.

United kingdomTapio schneiderEllie highwoodAyesha tandonAlejandro bodas salcedoPropulsion laboratoryPacific northwest national laboratorColumbia universityGoddard institute for spaceUniversity of readingUnited kingdom met officeDepartment of meteorologyAtmospheric sciences globalCarbon briefNature climate changeCoupled model intercomparison project