Temporal and Spatial Changes in Evapotranspiration and Its Potential Driving Factors in Mongolia over the Past 20 Years

Evapotranspiration (ET) plays an important role in the study of regional long-term water cycles. The cycle Mongolia has been seriously affected by global warming and intensification human activities. A significant relationship exists between climate factors ET. In this paper, temporal spatial fluctuations stability ET from 2001 to 2020 were studied using MOD16A2 ET, MOD13A2 NDVI data ERA5-Land. trends analysed Breaks for Additive Season Trend (BFAST) software package, Theil–Sen median trend analysis, Mann–Kendall method Hurst index. correlations temperature (Tem), precipitation (Pre), net solar radiation (Nsr), soil moisture (Swl) activities determined partial correlation analysis a geographic detector. past 20 years, increased significantly 49.4% Mongolia, also showed increasing trend. BFAST detected two mutation years. decreased rapidly 2006 2007 2015 2016. addition winter, meteorological factor that had positive impact on east west was Pre, whereas Tem more obvious central Mongolia. great vegetation growing season, joint action Pre greatly positively contributed geographical detector influence annual weakened changes Pre. Nsr nonlinearly other natural bivariate enhancement. These results will help understand responses provide support future research cycle.