干旱区生态环境知识资源中心(Arid): Diagnosis of environmental controls on daily actual evapotranspiration across a global flux tower network: the roles of water and energy

Arid

DOI	10.1088/1748-9326/abcc8c
	Diagnosis of environmental controls on daily actual evapotranspiration across a global flux tower network: the roles of water and energy
	Han, Qiong; Liu, Qin; Wang, Tiejun; Wang, Lichun; Di, Chongli; Chen, Xi; Smettem, Keith; Singh, Shailesh Kumar
通讯作者	Wang, TJ (corresponding author), Tianjin Univ, Sch Earth Syst Sci, Inst Surface Earth Syst Sci, Weijin Rd 92, Tianjin 300072, Peoples R China. ; Wang, TJ (corresponding author), Tianjin Univ, Tianjin Key Lab Earth Crit Zone Sci & Sustainable, Weijin Rd 92, Tianjin 300072, Peoples R China.
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
ISSN	1748-9326
出版年	2020
卷号	15 期号:12
英文摘要	Relative contributions from environmental factors to daily actual evapotranspiration (ETa) across a variety of climate zones is a widely open research question, especially regarding the roles played by soil water content ((SWC); water supply) and net radiation ((Rn); energy supply) in controlling ETa. Here, the boosted regression tree method scheme was employed to quantify environmental controls on daily ETa using the global FLUXNET dataset. Similar to the general trend suggested by the Budyko theory at annual scales, the results showed that the relative control of SWC on daily ETa increased with increasing aridity index (phi); however, Rn played a major role at most FLUXNET sites (roughly phi < 4), indicating that Rn could be a leading control on daily ETa even at water-limited sites. The variability in the relative controls of SWC and Rn also partly depended on factors affecting water availability for daily ETa (e.g. vegetation characteristics and groundwater depth). Our study showed that other than SWC and Rn, the net effect of environmental controls (particularly leaf area index) on daily ETa was more important at drier sites than at relatively humid sites. This suggests that near-surface hydrological processes are more sensitive to vegetation variations due to their ability to extract deep soil water and enhance ETa, especially under arid and semi-arid climatic conditions. Our findings illustrate how environmental controls on daily ETa change as the climate dries, which has important implications for many scientific disciplines including hydrological, climatic, and agricultural studies.
英文关键词	actual evapotranspiration FLUXNET soil water net radiation boosted regression tree daily time scale
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000601127300001
WOS关键词	CLIMATE-CHANGE ; SOIL-MOISTURE ; LAND-COVER ; DATA SET ; BALANCE ; CARBON ; VEGETATION ; FOREST ; VARIABILITY ; FRAMEWORK
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
来源机构	University of Western Australia
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369225
作者单位	[Han, Qiong; Liu, Qin; Wang, Tiejun; Wang, Lichun; Di, Chongli; Chen, Xi] Tianjin Univ, Sch Earth Syst Sci, Inst Surface Earth Syst Sci, Weijin Rd 92, Tianjin 300072, Peoples R China; [Wang, Tiejun; Wang, Lichun; Di, Chongli; Chen, Xi] Tianjin Univ, Tianjin Key Lab Earth Crit Zone Sci & Sustainable, Weijin Rd 92, Tianjin 300072, Peoples R China; [Smettem, Keith] Univ Western Australia, Inst Agr, Crawley, WA 6009, Australia; [Singh, Shailesh Kumar] Natl Inst Water & Atmospher Res, Christchurch, New Zealand
推荐引用方式 GB/T 7714	Han, Qiong,Liu, Qin,Wang, Tiejun,et al. Diagnosis of environmental controls on daily actual evapotranspiration across a global flux tower network: the roles of water and energy[J]. University of Western Australia,2020,15(12).
APA	Han, Qiong.,Liu, Qin.,Wang, Tiejun.,Wang, Lichun.,Di, Chongli.,...&Singh, Shailesh Kumar.(2020).Diagnosis of environmental controls on daily actual evapotranspiration across a global flux tower network: the roles of water and energy.ENVIRONMENTAL RESEARCH LETTERS,15(12).
MLA	Han, Qiong,et al."Diagnosis of environmental controls on daily actual evapotranspiration across a global flux tower network: the roles of water and energy".ENVIRONMENTAL RESEARCH LETTERS 15.12(2020).