气候变化领域集成服务门户(CCPortal): Drought self-propagation in drylands due to land-atmosphere feedbacks

CCPortal

DOI	10.1038/s41561-022-00912-7
	Drought self-propagation in drylands due to land-atmosphere feedbacks
	Schumacher, Dominik L.; Keune, Jessica; Dirmeyer, Paul; Miralles, Diego G.
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
起始页码	262
结束页码	+
卷号	15 期号:4 页码:14
英文摘要	Dryland droughts are prone to self-propagation due to the enhanced soil water stress, according to atmospheric moisture-tracking analysis of recent major droughts around the world. Reduced evaporation due to dry soils can affect the land surface energy balance, with implications for local and downwind precipitation. When evaporation is constrained by soil moisture, the atmospheric supply of water is depleted, and this deficit may propagate in time and space. This mechanism could theoretically result in the self-propagation of droughts, but the extent to which this process occurs is unknown. Here we isolate the influence of soil moisture drought on downwind precipitation using Lagrangian moisture tracking constrained by observations from the 40 largest recent droughts worldwide. We show that dryland droughts are particularly prone to self-propagating because evaporation tends to respond strongly to enhanced soil water stress. In drylands, precipitation can decline by more than 15% due to upwind drought during a single event and up to 30% during individual months. In light of projected widespread reductions in water availability, this feedback may further exacerbate future droughts.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000770187800002
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272553
作者单位	Ghent University; Center for Ocean Land Atmosphere Studies; George Mason University
推荐引用方式 GB/T 7714	Schumacher, Dominik L.,Keune, Jessica,Dirmeyer, Paul,et al. Drought self-propagation in drylands due to land-atmosphere feedbacks[J],2022,15(4):14.
APA	Schumacher, Dominik L.,Keune, Jessica,Dirmeyer, Paul,&Miralles, Diego G..(2022).Drought self-propagation in drylands due to land-atmosphere feedbacks.NATURE GEOSCIENCE,15(4),14.
MLA	Schumacher, Dominik L.,et al."Drought self-propagation in drylands due to land-atmosphere feedbacks".NATURE GEOSCIENCE 15.4(2022):14.