气候变化领域集成服务门户(CCPortal): Observational constraints on low cloud feedback reduce uncertainty of climate sensitivity

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DOI	10.1038/s41558-021-01039-0
	Observational constraints on low cloud feedback reduce uncertainty of climate sensitivity
	Myers T.A.; Scott R.C.; Zelinka M.D.; Klein S.A.; Norris J.R.; Caldwell P.M.
发表日期	2021
ISSN	1758-678X
起始页码	501
结束页码	507
卷号	11 期号:6
英文摘要	Marine low clouds strongly cool the planet. How this cooling effect will respond to climate change is a leading source of uncertainty in climate sensitivity, the planetary warming resulting from CO2 doubling. Here, we observationally constrain this low cloud feedback at a near-global scale. Satellite observations are used to estimate the sensitivity of low clouds to interannual meteorological perturbations. Combined with model predictions of meteorological changes under greenhouse warming, this permits quantification of spatially resolved cloud feedbacks. We predict positive feedbacks from midlatitude low clouds and eastern ocean stratocumulus, nearly unchanged trade cumulus and a near-global marine low cloud feedback of 0.19 ± 0.12 W m−2 K−1 (90% confidence). These constraints imply a moderate climate sensitivity (~3 K). Despite improved midlatitude cloud feedback simulation by several current-generation climate models, their erroneously positive trade cumulus feedbacks produce unrealistically high climate sensitivities. Conversely, models simulating erroneously weak low cloud feedbacks produce unrealistically low climate sensitivities. © 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/237321
作者单位	Lawrence Livermore National Laboratory, Livermore, CA, United States; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; Science Systems and Applications, Inc., Hampton, VA, United States
推荐引用方式 GB/T 7714	Myers T.A.,Scott R.C.,Zelinka M.D.,et al. Observational constraints on low cloud feedback reduce uncertainty of climate sensitivity[J],2021,11(6).
APA	Myers T.A.,Scott R.C.,Zelinka M.D.,Klein S.A.,Norris J.R.,&Caldwell P.M..(2021).Observational constraints on low cloud feedback reduce uncertainty of climate sensitivity.Nature Climate Change,11(6).
MLA	Myers T.A.,et al."Observational constraints on low cloud feedback reduce uncertainty of climate sensitivity".Nature Climate Change 11.6(2021).