气候变化领域集成服务门户(CCPortal): Modeling actual evapotranspiration with routine meteorological variables in the data-scarce region of the Tibetan Plateau: Comparisons and implications

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DOI	10.1002/2015JG003006
	Modeling actual evapotranspiration with routine meteorological variables in the data-scarce region of the Tibetan Plateau: Comparisons and implications
	Ma, Ning; Zhang, Yinsheng; Xu, Chong-Yu; Szilagyi, Jozsef
通讯作者	Zhang, YS (通讯作者)
发表日期	2015
ISSN	2169-8953
EISSN	2169-8961
起始页码	1638
结束页码	1657
卷号	120 期号:8
英文摘要	Quantitative estimation of actual evapotranspiration (ETa) by in situ measurements and mathematical modeling is a fundamental task for physical understanding of ETa as well as the feedback mechanisms between land and the ambient atmosphere. However, the ETa information in the Tibetan Plateau (TP) has been greatly impeded by the extremely sparse ground observation network in the region. Approaches for estimating ETa solely from routine meteorological variables are therefore important for investigating spatiotemporal variations of ETa in the data-scarce region of the TP. Motivated by this need, the complementary relationship (CR) and Penman-Monteith approaches were evaluated against in situ measurements of ETa on a daily basis in an alpine steppe region of the TP. The former includes the Nonlinear Complementary Relationship (Nonlinear-CR) as well as the Complementary Relationship Areal Evapotranspiration (CRAE) models, while the latter involves the Katerji-Perrier and the Todorovic models. Results indicate that the Nonlinear-CR, CRAE, and Katerji-Perrier models are all capable of efficiently simulating daily ETa, provided their parameter values were appropriately calibrated. The Katerji-Perrier model performed best since its site-specific parameters take the soil water status into account. The Nonlinear-CR model also performed well with the advantage of not requiring the user to choose between a symmetric and asymmetric CR. The CRAE model, even with a relatively low Nash-Sutcliffe efficiency (NSE) value, is also an acceptable approach in this data-scarce region as it does not need information of wind speed and ground surface conditions. In contrast, application of the Todorovic model was found to be inappropriate in the dry regions of the TP due to its significant overestimation of ETa as it neglects the effect of water stress on the bulk surface resistance. Sensitivity analysis of the parameter values demonstrated the relative importance of each parameter in the corresponding model. Overall, the Nonlinear-CR model is recommended in the absence of measured ETa for local calibration of the model parameter values.
关键词	PENMAN-MONTEITH EQUATION RATIO ENERGY-BALANCE COMPLEMENTARY RELATIONSHIP WATER-BALANCE INTERANNUAL VARIABILITY EVAPO-TRANSPIRATION CANOPY RESISTANCE PAN EVAPORATION IRRIGATED CROPS SUMMER MONSOON
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS记录号	WOS:000363332300013
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258587
推荐引用方式 GB/T 7714	Ma, Ning,Zhang, Yinsheng,Xu, Chong-Yu,et al. Modeling actual evapotranspiration with routine meteorological variables in the data-scarce region of the Tibetan Plateau: Comparisons and implications[J]. 中国科学院青藏高原研究所,2015,120(8).
APA	Ma, Ning,Zhang, Yinsheng,Xu, Chong-Yu,&Szilagyi, Jozsef.(2015).Modeling actual evapotranspiration with routine meteorological variables in the data-scarce region of the Tibetan Plateau: Comparisons and implications.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,120(8).
MLA	Ma, Ning,et al."Modeling actual evapotranspiration with routine meteorological variables in the data-scarce region of the Tibetan Plateau: Comparisons and implications".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 120.8(2015).