气候变化领域集成服务门户(CCPortal): Stratospheric water vapor: an important climate feedback

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DOI	10.1007/s00382-019-04721-4
	Stratospheric water vapor: an important climate feedback
	Banerjee A.; Chiodo G.; Previdi M.; Ponater M.; Conley A.J.; Polvani L.M.
发表日期	2019
ISSN	0930-7575
起始页码	1697
结束页码	1710
卷号	53 期号:2020-03-04
英文摘要	The role of stratospheric water vapor (SWV) changes, in response to increasing CO 2, as a feedback component of quantitative significance for climate sensitivity has remained controversial. Here, we calculate the SWV climate feedback under abrupt CO 2 quadrupling in the CMIP5 ensemble of models. All models robustly show a moistening of the stratosphere, causing a global mean net stratosphere adjusted radiative perturbation of 0.89±0.27Wm-2 at the reference tropopause. The stratospheric temperature adjustment is a crucial component of this radiative perturbation. The associated climate feedback is 0.17±0.05Wm-2K-1, with a considerable inter-model range of 0.12–0.28 Wm-2K-1. Taking into account the rise in tropopause height under 4 × CO 2 slightly reduces the feedback to 0.15±0.04Wm-2K-1, with a range of 0.10–0.26Wm-2K-1. The SWV radiative perturbation peaks in the midlatitudes and not the tropics: this is due primarily to increases in SWV in the extratropical lowermost stratosphere, which cause the majority (over three quarters) of the global mean feedback. Based on these results, we suggest an increased focus on understanding drivers of water vapor trends in the extratropical lowermost stratosphere. We conclude that the SWV feedback is important, being on the same order of magnitude as the global mean surface albedo and cloud feedbacks in the multi-model mean. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Climate change; Climate feedback; CMIP5 models; Partial radiative perturbation; Radiative kernel; Stratospheric water vapor
语种	英语
scopus关键词	carbon dioxide; climate change; climate feedback; CMIP; radiative transfer; stratosphere; tropopause; water vapor
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146087
作者单位	Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; National Oceanic and Atmospheric Administration/Earth System Research Laboratory/Chemical Sciences Division, Boulder, CO, United States; Department of Earth and Environmental Sciences, Lamont Doherty Earth Observatory, Palisades, New York, NY, United States; Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, Weßling, 82230, Germany; National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Banerjee A.,Chiodo G.,Previdi M.,et al. Stratospheric water vapor: an important climate feedback[J],2019,53(2020-03-04).
APA	Banerjee A.,Chiodo G.,Previdi M.,Ponater M.,Conley A.J.,&Polvani L.M..(2019).Stratospheric water vapor: an important climate feedback.Climate Dynamics,53(2020-03-04).
MLA	Banerjee A.,et al."Stratospheric water vapor: an important climate feedback".Climate Dynamics 53.2020-03-04(2019).