Spatial Heterogeneity in Sensitivity of Evapotranspiration to Climate Change
Henian Wang1, 2, Manyin Zhang1, 2 , Lijuan Cui1, 2, Xinxiao Yu3
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1Institute of Wetland Research, Chinese Academy of Forestry, Beijing, 100091, China
2Beijing Key Laboratory of Wetland Services and Restoration, Beijing, 100091, China
3Beijing Forestry University, Beijing, 100083, China
Submission date: 2017-03-17
Final revision date: 2017-04-06
Acceptance date: 2017-04-10
Online publication date: 2017-08-28
Publication date: 2017-09-28
Pol. J. Environ. Stud. 2017;26(5):2287–2293
Long-term water-energy balance is a major concern in hydrology and water resource management. Evapotranspiration is a key factor for achieving water-energy balance. In this study, we used a simple water and energy balance equation to compare the effects of precipitation and potential evapotranspiration on actual evapotranspiration – mathematically and theoretically. The results showed that, in Baiyangdian catchment, a 1 mm or 10% increase in precipitation would lead to a 0.51 mm or 6.6% in actual evapotranspiration, and a 1 mm or 10% increase in potential evapotranspiration would lead to a 0.14 mm or 3.4% in actual evapotranspiration. The regional differences in the 10 regions of China showed that the effects of climate on actual evapotranspiration were significantly influenced by the aridity index. The changes of potential evapotranspiration will lead to more changes in actual evapotranspiration in humid regions, and the changes of precipitation will lead to more changes in actual evapotranspiration in arid regions.