气候变化领域集成服务门户(CCPortal): An underestimated negative cloud feedback from cloud lifetime changes

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DOI	10.1038/s41558-021-01038-1
	An underestimated negative cloud feedback from cloud lifetime changes
	Mülmenstädt J.; Salzmann M.; Kay J.E.; Zelinka M.D.; Ma P.-L.; Nam C.; Kretzschmar J.; Hörnig S.; Quaas J.
发表日期	2021
ISSN	1758-678X
起始页码	508
结束页码	513
卷号	11 期号:6
英文摘要	As the atmosphere warms, part of the cloud population shifts from ice and mixed-phase (‘cold’) to liquid (‘warm’) clouds. Because warm clouds are more reflective and longer-lived, this phase change reduces the solar flux absorbed by the Earth and constitutes a negative radiative feedback. This cooling feedback is weaker in the sixth phase of the Coupled Model Intercomparison Project (CMIP6) than in the fifth phase (CMIP5), contributing to greater greenhouse warming. Although this change is often attributed to improvements in the simulated cloud phase, another model bias persists: warm clouds precipitate too readily, potentially leading to underestimated negative lifetime feedbacks. In this study we modified a climate model to better simulate warm-rain probability and found that it exhibits a cloud lifetime feedback nearly three times larger than the default model. This suggests that model errors in cloud-precipitation processes may bias cloud feedbacks by as much as the CMIP5-to-CMIP6 climate sensitivity difference. Reliable climate model projections therefore require improved cloud process realism guided by process-oriented observations and observational constraints. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237311
作者单位	Institute for Meteorology, Universität Leipzig, Leipzig, Germany; Atmospheric Sciences & Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States; Department of Atmospheric and Oceanic Sciences and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Cloud Processes Research and Modeling Group, Lawrence Livermore National Laboratory, Livermore, CA, United States; Climate Service Center Germany, Helmholtz-Zentrum Hereon GmbH, Hamburg, Germany
推荐引用方式 GB/T 7714	Mülmenstädt J.,Salzmann M.,Kay J.E.,et al. An underestimated negative cloud feedback from cloud lifetime changes[J],2021,11(6).
APA	Mülmenstädt J..,Salzmann M..,Kay J.E..,Zelinka M.D..,Ma P.-L..,...&Quaas J..(2021).An underestimated negative cloud feedback from cloud lifetime changes.Nature Climate Change,11(6).
MLA	Mülmenstädt J.,et al."An underestimated negative cloud feedback from cloud lifetime changes".Nature Climate Change 11.6(2021).