Subjects: Geosciences >> Hydrology submitted time 2023-08-25 Cooperative journals: 《干旱区研究》
Abstract： Understanding the dynamic process of evapotranspiration and its causes is crucial for water resourcestability, ecological and environmental security, and agricultural water resource management in arid Central Asia.Evapotranspiration is the connection between the water-energy-carbon cycle. This study used the Priestley-Taylordiurnal land surface temperature range (PT- DTsR) model to calculate and analyze the spatial and temporalvariability of evapotranspiration in arid Central Asia from 2000 to 2019. It also used the Lindeman- Merenda-Gold method to quantitatively evaluate the absolute contributions of various drivers to each component ofevapotranspiration. By weighing each component’s contribution to the change in evapotranspiration, thecontribution of each driver to evapotranspiration was assessed. According to the findings, evapotranspirationincreased in dry Central Asia at a rate of 1.45 mm per year, and its pattern indicates that it increased in the eastand decreased in the west. The changes in transpiration, evaporation, and interception were 2.46 mm·a-1, -1.03mm·a- 1, and 0.02 mm·a- 1, respectively. These three trends contributed 70.09%, 29.34%, and 0.57%, to thechange in evapotranspiration. With an absolute contribution of 28.16%, Normalized Difference Vegetation Index(NDVI) is the key driver of evapotranspiration fluctuations in arid Central Asia.
Hits
Hits
Downloads
Comment