AUTHOR=Yizhe Li , Huiliang Wang , Xin Zhang , Chenhao Li , Zihao Tian , Qiufen Zhang , Xizhi Lv , Tianling Qin 

TITLE=Spatiotemporal variations and driving factors of reference evapotranspiration in the Yiluo river basin

JOURNAL=Frontiers in Earth Science

VOLUME=10

YEAR=2023

URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2022.1048200

DOI=10.3389/feart.2022.1048200

ISSN=2296-6463

ABSTRACT=<p>The variations in the reference evapotranspiration (ET<sub>0</sub>) are closely related to meteorological factors. The purpose of this study is to explore the relationships between the meteorological factors and the ET<sub>0</sub>. Based on meteorological data from 26 meteorological stations in the Yiluo River Basin (YLRB) and its surrounding areas from 1958 to 2020, in this study, the temporal and spatial variations and driving factors of the ET<sub>0</sub> in the YLRB are investigated. The results are as follows. Spatially, the annual ET<sub>0</sub> decreases from the northeast to the southwest in the YLRB. Temporally, the annual ET<sub>0</sub> exhibits a fluctuating decreasing trend rather than a monotonic decreasing trend during the entire period. The trend of the ET<sub>0</sub> contains two mutation points, in 1972 and 1994. Thus, the research period can be divided into three periods. It is concluded that the variations in the ET<sub>0</sub> are the most sensitive to the relative humidity, but the driving factor that contributes the most to the variations in the ET<sub>0</sub> is the wind speed. The driving factors are closely related to the rates of relative change of the meteorological factors.</p>