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Estimating Regional Evapotranspiration Using a Satellite-Based Wind Speed Avoiding Priestley–Taylor Approach
 
 
Article

Spatiotemporal Variations of Reference Evapotranspiration and Its Determining Climatic Factors in the Taihang Mountains, China

by 1,2, 3 and 1,*
1
Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
2
University of the Chinese Academy of Sciences, Beijing 100049, China
3
Key Laboratory of City Cluster Environmental Safety and Green Development, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, China
*
Author to whom correspondence should be addressed.
Academic Editors: Renato Morbidelli and Yongqiang Zhang
Water 2021, 13(21), 3145; https://doi.org/10.3390/w13213145
Received: 21 August 2021 / Revised: 6 October 2021 / Accepted: 27 October 2021 / Published: 8 November 2021
(This article belongs to the Section Hydrology)
Reference evapotranspiration (ETo) is an effective measure of atmospheric water demand of the land surface. In-depth investigations of the relationship between ETo and primary climatic factors can facilitate the adaptable agriculture and optimize water management, especially in the ecologically fragile Taihang Mountains (THM). This work assessed the spatiotemporal dynamics of ETo and its driving climatic factors from 1973 to 2016 in THM. Results showed: (1) Annual ETo slightly increased during 1973–2016; relative humidity (RH) decreased more slowly, the temperature increased more rapidly, and wind speed (WS) decreased more rapidly at higher elevation than those at lower elevations; (2) two breakpoints occurred in ETo series at 1990 and 1997, and an “evaporation paradox” existed in 1973–1990; (3) ETo at higher elevations had greater sensitivity to changes in RH and lower sensitivity to changes in Tmax and WS. Sensitivity of ETo to minimum air temperature (Tmin) at middle elevations was lowest among three elevation bands; (4) RH and sunshine duration (SD) were the dominant climatic factors of ETo for most periods and stations. This study helps us understand the impact of climate change on ETo in mountainous areas and confirms reference evapotranspiration in high-elevation areas is particularly sensitive to climate change. View Full-Text
Keywords: reference evapotranspiration; multiple breakpoints; sensitivity analysis; vertical gradients; dominant climatic factor; mountainous area reference evapotranspiration; multiple breakpoints; sensitivity analysis; vertical gradients; dominant climatic factor; mountainous area
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MDPI and ACS Style

Kang, T.; Li, Z.; Gao, Y. Spatiotemporal Variations of Reference Evapotranspiration and Its Determining Climatic Factors in the Taihang Mountains, China. Water 2021, 13, 3145. https://doi.org/10.3390/w13213145

AMA Style

Kang T, Li Z, Gao Y. Spatiotemporal Variations of Reference Evapotranspiration and Its Determining Climatic Factors in the Taihang Mountains, China. Water. 2021; 13(21):3145. https://doi.org/10.3390/w13213145

Chicago/Turabian Style

Kang, Tingting, Zeng Li, and Yanchun Gao. 2021. "Spatiotemporal Variations of Reference Evapotranspiration and Its Determining Climatic Factors in the Taihang Mountains, China" Water 13, no. 21: 3145. https://doi.org/10.3390/w13213145

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