1. Comparison of evapotranspiration between two alpine type wetland ecosystems in Qinghai lake basin of Qinghai-Tibet Plateau.
- Author
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Cao, Shengkui, Cao, Guangchao, Han, Guangzhao, Wu, Fangtao, and Lan, Yao
- Subjects
WATERSHEDS ,MOUNTAIN soils ,MOUNTAIN ecology ,LEAF area index ,EVAPOTRANSPIRATION ,ECOSYSTEMS ,WETLANDS - Abstract
Alpine wetland ecosystems play significant roles in water regulation and regional ecological safety on the Qinghai-Tibet Plateau due to large water conservation potential. The knowledge of evapotranspiration (ET) in various alpine wetland ecosystems is of great significance for understanding the water balance of wetland ecosystems and carrying out eco-environment conservation. Therefore, two alpine wetland ecosystems as lakeside and headwater of Qinghai Lake basin were selected, and their ET characteristics and influencing factors were researched over two years. The daily ET in the lakeside ecosystem showed 'double peak' curve, and the headwater ecosystem showed the 'multiple peak' ET curve. The monthly ETs in two respective wetlands ranged from 9.88 to 111.56 mm and from 0.23 to 75.5 mm, respectively. The annual ET in the lakeside ecosystem was averagely 1.89 times more than that of the headwater. Stepwise multiple linear regressions indicated that monthly average net radiation (R n) and leaf area index (LAI) explained 96% variance in monthly ET in the lakeside ecosystem; R n and monthly average wind speed (WS) explained 94% variance in monthly ET in the headwater ecosystem. These results indicated that the ET is variable in two alpine wetland ecosystems and R n was their primary driving factor on monthly scale. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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