气候变化领域集成服务门户(CCPortal): Estimation of actual evapotranspiration from different ecosystems on the Tibetan Plateau based on a generalized complementary evapotranspiration theory model

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DOI	10.1002/eco.2635
	Estimation of actual evapotranspiration from different ecosystems on the Tibetan Plateau based on a generalized complementary evapotranspiration theory model
	Dai, Yanyu; Lu, Fan; Liu, Jintao; Ruan, Benqing
发表日期	2024
ISSN	1936-0584
EISSN	1936-0592
起始页码	17
结束页码	3
卷号	17 期号:3
英文摘要	Actual evapotranspiration constitutes a vital component of the exchange of energy and water vapour between the soil-vegetation and atmospheric systems on terrestrial terrain. Nevertheless, the Tibetan Plateau, owing to its austere environmental conditions, harbours a scarcity of terrestrial monitoring stations. This circumstance presents a formidable challenge in attaining precise estimations of actual evapotranspiration. The complementary relationship method is a potential approach because it requires only routine meteorological data to estimate actual evapotranspiration on a regional or global scale. However, the suitability of the complementary relationship model across diverse ecosystems on the Tibetan Plateau necessitates further investigation. In this study, we scrutinized the simulation of daily and monthly actual evapotranspiration across 18 observation sites spanning eight distinct land use categories on the Tibetan Plateau. We employed the polynomial generalized complementary function introduced by Brutsaert (B2015), alongside its enhanced rendition proposed by Szilagyi (S2017) and Crago (C2018). The outcomes reveal that all three models adeptly replicate the fluctuations in actual evapotranspiration, irrespective of land use category or temporal scale-whether daily or monthly. This is true regardless of whether original or calibrated parameter values are applied. However, there exist significant variations in the performance of these models. In general, the C2018 model demonstrates superior performance across most ecosystems when original parameters are employed. Following parameter calibration, the simulation efficacy of the models experienced marked enhancement. Post parameter calibration, the B2015 model outperforms the other two models notably in desert and wetland environments. Furthermore, the simulation outputs from all three models display heightened sensitivity to parameter alpha, particularly in the context of the C2018 and S2017 models. These findings suggest that accurate estimation of parameter values is critical to improving the accuracy of estimating actual evapotranspiration. Calibrated parameter values, contingent on a fusion of vegetation, meteorology and surface roughness, exhibit variability across diverse ecosystems.
英文关键词	CR; evapotranspiration; model parameters; Tibetan plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
WOS类目	Ecology ; Environmental Sciences ; Water Resources
WOS记录号	WOS:001169599600001
来源期刊	ECOHYDROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303268
作者单位	China Institute of Water Resources & Hydropower Research; Hohai University; China Institute of Water Resources & Hydropower Research
推荐引用方式 GB/T 7714	Dai, Yanyu,Lu, Fan,Liu, Jintao,et al. Estimation of actual evapotranspiration from different ecosystems on the Tibetan Plateau based on a generalized complementary evapotranspiration theory model[J],2024,17(3).
APA	Dai, Yanyu,Lu, Fan,Liu, Jintao,&Ruan, Benqing.(2024).Estimation of actual evapotranspiration from different ecosystems on the Tibetan Plateau based on a generalized complementary evapotranspiration theory model.ECOHYDROLOGY,17(3).
MLA	Dai, Yanyu,et al."Estimation of actual evapotranspiration from different ecosystems on the Tibetan Plateau based on a generalized complementary evapotranspiration theory model".ECOHYDROLOGY 17.3(2024).