Abstract
The evapotranspiration product of Global Land Evaporation Amsterdam Model from 1980 to 2017 was used in this study to analyze the spatial and temporal variations of ET in the headwaters of the Yellow River. The results showed that the mean annual ET in the study area was 416.8mm for the period of 1980-2017, increasing gradually from west to east. The ET presented a unimodal distribution, with lower values in January, February, November, and December, and increased significantly from May to September, with the largest ET in July and August. From 1980 to 2017, the annual ET showed a non-significant increasing trend, and the change point for ET is around 2004.
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