干旱区生态环境知识资源中心(Arid): Evapotranspiration Retrieval Under Different Aridity Conditions Over North American Grasslands

Arid

DOI	10.1109/TGRS.2020.2980453
	Evapotranspiration Retrieval Under Different Aridity Conditions Over North American Grasslands
	Liao, Qian-Yu; Leng, Pei; Ren, Chao; Li, Zhao-Liang; Gao, Mao-Fang; Duan, Si-Bo; Zhang, Xia; Shang, Guo-Fei
通讯作者	Leng, P
来源期刊	IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
ISSN	0196-2892
EISSN	1558-0644
出版年	2020
卷号	58 期号:10 页码:7205-7215
英文摘要	Evapotranspiration (ET) is one of the most critical parameters in water- and energy-related domains. Two basic assumptions with respect to soil-moisture variation have been widely investigated for the retrieval of ET based on the trapezoid methods. Specifically, soil moisture within the surface and root-zone layers was assumed to vary synchronously in most of the earlier analyses. However, several recent investigations assumed that soil moisture within the upper soil layer should be dried up before the root-zone layer is stressed. To this end, the retrieval of ET under different aridity conditions over North American grasslands was investigated with the two assumptions, and the estimated ET was assessed using the flux data collected from eight AmeriFlux sites. Based on the available data from 2002 to 2018, results showed that the asynchronous-assumed method can obtain better ET estimates than the synchronous-assumed method over semiarid and subhumid areas, whereas the synchronous-assumed method can obtain better ET estimates in humid areas. Moreover, because of the different closure techniques used for the ET correction, no consistent conclusions could be found for the arid conditions to determine which trapezoid was better. Specifically, it was found that the cases of surface soil with zero water availability that were defined by the asynchronous-assumed trapezoid method rarely occur, even in arid areas, which indicated that the critical boundary that determines whether the root-zone layer begins to be water-stressed may need to be redefined.
英文关键词	Vegetation mapping Soil moisture Satellites Remote sensing Moisture Land surface AmeriFlux aridity conditions evapotranspiration (ET) soil-moisture variation water-stress
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000573923100033
WOS关键词	ENERGY-BALANCE CLOSURE ; SURFACE EVAPOTRANSPIRATION ; SOIL-MOISTURE ; MODEL ; TEMPERATURE ; PERFORMANCE ; ALGORITHM ; MODIS
WOS类目	Geochemistry & Geophysics ; Engineering, Electrical & Electronic ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Geochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326572
作者单位	[Liao, Qian-Yu; Leng, Pei; Li, Zhao-Liang; Gao, Mao-Fang; Duan, Si-Bo] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China; [Liao, Qian-Yu; Ren, Chao] Guilin Univ Technol, Coll Geomat & Geoinformat, Guilin 541000, Peoples R China; [Zhang, Xia; Shang, Guo-Fei] Hebei GEO Univ, Sch Land Resources & Urban Rural Planning, Shijiazhuang 050031, Hebei, Peoples R China
推荐引用方式 GB/T 7714	Liao, Qian-Yu,Leng, Pei,Ren, Chao,et al. Evapotranspiration Retrieval Under Different Aridity Conditions Over North American Grasslands[J],2020,58(10):7205-7215.
APA	Liao, Qian-Yu.,Leng, Pei.,Ren, Chao.,Li, Zhao-Liang.,Gao, Mao-Fang.,...&Shang, Guo-Fei.(2020).Evapotranspiration Retrieval Under Different Aridity Conditions Over North American Grasslands.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,58(10),7205-7215.
MLA	Liao, Qian-Yu,et al."Evapotranspiration Retrieval Under Different Aridity Conditions Over North American Grasslands".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 58.10(2020):7205-7215.