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DOI	10.1038/s41558-020-00970-y
	Observational constraint on cloud feedbacks suggests moderate climate sensitivity
	Cesana G.V.; Del Genio A.D.
发表日期	2021
ISSN	1758678X
起始页码	213
结束页码	218
卷号	11 期号:3
英文摘要	Global climate models predict warming in response to increasing GHG concentrations, partly due to decreased tropical low-level cloud cover and reflectance. We use satellite observations that discriminate stratocumulus from shallow cumulus clouds to separately evaluate their sensitivity to warming and constrain the tropical contribution to low-cloud feedback. We find an observationally inferred low-level cloud feedback two times smaller than a previous estimate. Shallow cumulus clouds are insensitive to warming, whereas global climate models exhibit a large positive cloud feedback in shallow cumulus regions. In contrast, stratocumulus clouds show sensitivity to warming and the tropical inversion layer strength, controlled by the tropical Pacific sea surface temperature gradient. Models fail to reproduce the historical sea surface temperature gradient trends and therefore changes in inversion strength, generating an overestimate of the positive stratocumulus cloud feedback. Continued weak east Pacific warming would therefore produce a weaker low-cloud feedback and imply a more moderate climate sensitivity (3.47 ± 0.33 K) than many models predict. ? 2021, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	cloud cover; global climate; greenhouse gas; numerical model; satellite data; sea surface temperature; stratocumulus; surface temperature; temperature gradient; warming
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/178781
作者单位	Center for Climate Systems Research, Columbia University, New York, NY, United States; NASA Goddard Institute for Space Studies, New York, NY, United States
推荐引用方式 GB/T 7714	Cesana G.V.,Del Genio A.D.. Observational constraint on cloud feedbacks suggests moderate climate sensitivity[J],2021,11(3).
APA	Cesana G.V.,&Del Genio A.D..(2021).Observational constraint on cloud feedbacks suggests moderate climate sensitivity.Nature Climate Change,11(3).
MLA	Cesana G.V.,et al."Observational constraint on cloud feedbacks suggests moderate climate sensitivity".Nature Climate Change 11.3(2021).