气候变化领域集成服务门户(CCPortal): Soil moisture–atmosphere feedbacks mitigate declining water availability in drylands

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DOI	10.1038/s41558-020-00945-z
	Soil moisture–atmosphere feedbacks mitigate declining water availability in drylands
	Zhou S.; Williams A.P.; Lintner B.R.; Berg A.M.; Zhang Y.; Keenan T.F.; Cook B.I.; Hagemann S.; Seneviratne S.I.; Gentine P.
发表日期	2021
ISSN	1758-678X
起始页码	38
结束页码	44
卷号	11 期号:1
英文摘要	Global warming alters surface water availability (precipitation minus evapotranspiration, P–E) and hence freshwater resources. However, the influence of land–atmosphere feedbacks on future P–E changes and the underlying mechanisms remain unclear. Here we demonstrate that soil moisture (SM) strongly impacts future P–E changes, especially in drylands, by regulating evapotranspiration and atmospheric moisture inflow. Using modelling and empirical approaches, we find a consistent negative SM feedback on P–E, which may offset ~60% of the decline in dryland P–E otherwise expected in the absence of SM feedbacks. The negative feedback is not caused by atmospheric thermodynamic responses to declining SM; rather, reduced SM, in addition to limiting evapotranspiration, regulates atmospheric circulation and vertical ascent to enhance moisture transport into drylands. This SM effect is a large source of uncertainty in projected dryland P–E changes, underscoring the need to better constrain future SM changes and improve the representation of SM–atmosphere processes in models. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	climate feedback; evapotranspiration; global warming; land-atmosphere interaction; mitigation; precipitation (climatology); soil moisture; thermodynamics; water availability; water resource
语种	英语
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/171603
作者单位	Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; Earth Institute, Columbia University, New York, NY, United States; Department of Earth and Environmental Engineering, Columbia University, New York, NY, United States; Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Department of Environmental Science Policy and Management, UC Berkeley, Berkeley, CA, United States; Department of Environmental Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States; Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States; NASA Goddard Institute for Space Studies, New York, NY, United States; Helmholtz-Zentrum Geesthacht, Institute of Coastal Research, Geesthacht, Germany; Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
推荐引用方式 GB/T 7714	Zhou S.,Williams A.P.,Lintner B.R.,等. Soil moisture–atmosphere feedbacks mitigate declining water availability in drylands[J],2021,11(1).
APA	Zhou S..,Williams A.P..,Lintner B.R..,Berg A.M..,Zhang Y..,...&Gentine P..(2021).Soil moisture–atmosphere feedbacks mitigate declining water availability in drylands.Nature Climate Change,11(1).
MLA	Zhou S.,et al."Soil moisture–atmosphere feedbacks mitigate declining water availability in drylands".Nature Climate Change 11.1(2021).