气候变化领域集成服务门户(CCPortal): Evaluating the complementary relationship of evapotranspiration in the alpine steppe of the Tibetan Plateau

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DOI	10.1002/2014WR015493
	Evaluating the complementary relationship of evapotranspiration in the alpine steppe of the Tibetan Plateau
	Ma, Ning; Zhang, Yinsheng; Szilagyi, Jozsef; Guo, Yanhong; Zhai, Jianqing; Gao, Haifeng
通讯作者	Zhang, YS (通讯作者)
发表日期	2015
ISSN	0043-1397
EISSN	1944-7973
起始页码	1069
结束页码	1083
卷号	51 期号:2
英文摘要	The complementary relationship (CR) of evapotranspiration allows the estimation of the actual evapotranspiration rate (ETa) of the land surface using only routine meteorological data, which is of great importance in the Tibetan Plateau (TP) due to its sparse observation network. With the highest in situ automatic climate observation system in a typical semiarid alpine steppe region of the TP, the wind function of Penman was replaced by one based on the Monin-Obukhov Similarity theory for calculating the potential evapotranspiration rate (ETp); the Priestley-Taylor coefficient, , was estimated using observations in wet days; and the slope of the saturation vapor pressure curve was evaluated at an estimate of the wet surface temperature, provided the latter was smaller than the actual air temperature. A symmetric CR was obtained between the observed daily actual and potential evapotranspiration. Local calibration of the parameter value (in this order) is key to obtaining a symmetric CR: , wet environment air temperature (T-wea), and wind function. Also, present symmetric CR contradicts previous research that used default parameter values for claiming an asymmetric CR in arid and semiarid regions of the TP. The effectiveness of estimating the daily ETa via symmetric CR was greatly improved when local calibrations were implemented. At the same time, an asymmetric CR was found between the observed daily ETa and pan evaporation rates (E-pan), both for D20 aboveground and E601B sunken pans. The daily ETa could also be estimated by coupling the E-pan of D20 aboveground and/or E601B sunken pan through CR. The former provided good descriptors for observed ETa, while the latter still tended to overestimate it to some extent.
关键词	PRIESTLEY-TAYLOR EQUATION ADVECTION-ARIDITY MODEL PAN EVAPORATION REGIONAL EVAPOTRANSPIRATION VAPOR TRANSPORT HEAT-FLUX TERRESTRIAL TRENDS WATER CHINA
英文关键词	actual evapotranspiration; potential evapotranspiration; pan evaporation; complementary relationship; alpine steppe; Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
WOS类目	Environmental Sciences ; Limnology ; Water Resources
WOS记录号	WOS:000351401200018
来源期刊	WATER RESOURCES RESEARCH
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/258582
推荐引用方式 GB/T 7714	Ma, Ning,Zhang, Yinsheng,Szilagyi, Jozsef,et al. Evaluating the complementary relationship of evapotranspiration in the alpine steppe of the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2015,51(2).
APA	Ma, Ning,Zhang, Yinsheng,Szilagyi, Jozsef,Guo, Yanhong,Zhai, Jianqing,&Gao, Haifeng.(2015).Evaluating the complementary relationship of evapotranspiration in the alpine steppe of the Tibetan Plateau.WATER RESOURCES RESEARCH,51(2).
MLA	Ma, Ning,et al."Evaluating the complementary relationship of evapotranspiration in the alpine steppe of the Tibetan Plateau".WATER RESOURCES RESEARCH 51.2(2015).