气候变化领域集成服务门户(CCPortal): Plant hydraulics accentuates the effect of atmospheric moisture stress on transpiration

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DOI	10.1038/s41558-020-0781-5
	Plant hydraulics accentuates the effect of atmospheric moisture stress on transpiration
	Liu Y.; Kumar M.; Katul G.G.; Feng X.; Konings A.G.
发表日期	2020
ISSN	1758-678X
起始页码	691
结束页码	695
卷号	10 期号:7
英文摘要	Transpiration, the dominant component of terrestrial evapotranspiration (ET), directly connects the water, energy and carbon cycles and is typically restricted by soil and atmospheric (for example, the vapour pressure deficit (VPD)) moisture stresses through plant hydraulic processes. These sources of stress are likely to diverge under climate change, with a globally enhanced VPD but more variable and uncertain changes in soil moisture. Here, using a model–data fusion approach, we demonstrate that the common empirical approach used in most Earth system models to evaluate the ET response to soil moisture and VPD, which neglects plant hydraulics, underestimates ET sensitivity to VPD and compensates by overestimating the sensitivity to soil moisture stress. A hydraulic model that describes water transport through the plant better captures ET under high VPD conditions for wide-ranging soil moisture states. These findings highlight the central role of plant hydraulics in regulating the increasing importance of atmospheric moisture stress on biosphere–atmosphere interactions under elevated temperatures. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	atmosphere-biosphere interaction; atmospheric moisture; carbon cycle; empirical analysis; energy flow; evapotranspiration; high temperature; hydraulics; soil moisture; transpiration; vapor pressure
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/142198
作者单位	Department of Earth System Science, Stanford University, Stanford, CA, United States; Department of Civil, Construction, and Environmental Engineering, University of Alabama, Tuscaloosa, AL, United States; Nicholas School of the Environment, Duke University, Durham, NC, United States; Department of Civil, Environmental and Geo-Engineering, University of Minnesota, Twin Cities, MN, United States
推荐引用方式 GB/T 7714	Liu Y.,Kumar M.,Katul G.G.,et al. Plant hydraulics accentuates the effect of atmospheric moisture stress on transpiration[J],2020,10(7).
APA	Liu Y.,Kumar M.,Katul G.G.,Feng X.,&Konings A.G..(2020).Plant hydraulics accentuates the effect of atmospheric moisture stress on transpiration.Nature Climate Change,10(7).
MLA	Liu Y.,et al."Plant hydraulics accentuates the effect of atmospheric moisture stress on transpiration".Nature Climate Change 10.7(2020).