干旱区生态环境知识资源中心(Arid): An Enhanced MOD16 Evapotranspiration Model for the Tibetan Plateau During the Unfrozen Season

Arid

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 (corresponding author), Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China. ; Ma, YM (corresponding author), Univ Chinese Acad Sci, Beijing, Peoples R China. ; Ma, YM ; Chen, XL (corresponding author), Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China.
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN	2169-897X
EISSN	2169-8996
出版年	2021
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.
英文关键词	evapotranspiration grassland MOD16 model soil surface resistance parameterization Tibetan Plateau
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000640969000026
WOS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
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	中国科学院青藏高原研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368848
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]. 中国科学院青藏高原研究所,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).