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Clouds study finds that low climate sensitivity is ‘extremely unlikely’ It is “very likely” that the way clouds change as the world warms will drive further temperature rise, a new study finds. The response of clouds to a change in global temperature – known as the “cloud feedback” – plays a crucial role in how much the planet will warm. However, estimates of cloud feedback are uncertain. The new study, published in Proceedings of the National Academy of Sciences, uses global satellite observations to reduce this uncertainty. Taking their findings into account, the authors produce a central estimate of equilibrium climate sensitivity (ECS) – the global temperature change resulting from a doubling of atmospheric CO2 – of 3.2C. They add that low ECS values below 2C are “extremely unlikely”.

United kingdomCity ofTapio schneiderEllie highwoodPaulo ceppiAyesha tandonYoko tsushimaSteven sherwoodDaniel mccoyPropulsion laboratoryWorld climate research programmeIntergovernmental panel on climate changeUniversity of readingProceedings of the national academy sciencesImperial college londonUnited kingdom met office