气候变化领域集成服务门户(CCPortal): An Enhanced MOD16 Evapotranspiration Model for the Tibetan Plateau During the Unfrozen Season

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DOI	10.1029/2020JD032787
	An Enhanced MOD16 Evapotranspiration Model for the Tibetan Plateau During the Unfrozen Season
	Yuan, Ling; Ma, Yaoming; Chen, Xuelong; Wang, Yuyang; Li, Zhaoguo
通讯作者	Ma, YM ; Chen, XL (通讯作者)，Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China. ; Ma, YM (通讯作者)，Univ Chinese Acad Sci, Beijing, Peoples R China. ; Ma, YM ; Chen, XL (通讯作者)，Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China.
发表日期	2021
ISSN	2169-897X
EISSN	2169-8996
卷号	126 期号:7
英文摘要	Evapotranspiration (ET) is composed of soil evaporation (ETs), canopy transpiration (ETc), and canopy intercepted water evaporation (ETw), and it plays an indispensable role in the water and energy cycles of land surface processes. More accurate estimations of variations in ET are essential for natural hazard monitoring and water resource management. An improved algorithm for ETs with soil moisture and texture (SMT) and an optimized ETc based on the MOD16 model (MOD16-STM) are proposed for the cold, arid, and semiarid regions of the Tibetan Plateau (TP). The nonlinear relationships between the soil surface resistance (r(s)(s)) and soil surface hydration state in different soil textures were redefined by using five flux tower measurements over the TP. The value of the mean potential stomatal conductance per unit leaf area (C-L) used for ETc calculation in grasslands was optimized at 0.0038 (m s(-1)). The MOD16-STM was compared with the MOD16 and a soil water index-based Priestley-Taylor algorithm (SWI-PT) at five independent sites. The results showed that the half-hourly, daily, and monthly estimations from the MOD16-STM were closer to observations than those from the other two models. The results indicated that the MOD16-STM increased R-2 by 0.2/0.05 and the index of agreement by 0.37/0.23 and deceased RMSE by 43.89/42.77 W m(-2) and the absolute mean bias (\|MB\|) by 46.23/45.89 W m(-2), when compared to the results of the MOD16 at daily/monthly scales. The results suggested that the MOD16-STM will produce more accurate ET estimates over the flux sites and has great potential for ET estimation and land surface model improvement for the TP region.
关键词	SURFACE-ENERGY-BALANCE LIGHT-USE EFFICIENCY LATENT-HEAT FLUX SOIL EVAPORATION EDDY-COVARIANCE BARE-SOIL VEGETATION INDEX 2-SOURCE MODEL WATER-VAPOR SYSTEM SEBS
英文关键词	evapotranspiration; grassland; MOD16 model; soil surface resistance parameterization; Tibetan Plateau
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000640969000026
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254948
作者单位	[Yuan, Ling; Ma, Yaoming; Chen, Xuelong; Wang, Yuyang] Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China; [Yuan, Ling; Ma, Yaoming; Wang, Yuyang] Univ Chinese Acad Sci, Beijing, Peoples R China; [Ma, Yaoming; Chen, Xuelong] Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China; [Li, Zhaoguo] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Yuan, Ling,Ma, Yaoming,Chen, Xuelong,et al. An Enhanced MOD16 Evapotranspiration Model for the Tibetan Plateau During the Unfrozen Season[J]. 中国科学院西北生态环境资源研究院,2021,126(7).
APA	Yuan, Ling,Ma, Yaoming,Chen, Xuelong,Wang, Yuyang,&Li, Zhaoguo.(2021).An Enhanced MOD16 Evapotranspiration Model for the Tibetan Plateau During the Unfrozen Season.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,126(7).
MLA	Yuan, Ling,et al."An Enhanced MOD16 Evapotranspiration Model for the Tibetan Plateau During the Unfrozen Season".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 126.7(2021).