Evapotranspiration change under Short-term Experimental Warming in a Swamp Meadow Ecosystem of the Qinghai-Tibet plateau

2018 2nd International Conference on Environmental and Energy Engineering

生态环境科学;能源学

Liu, G.S.^1 ; Zhao, C.^1

College of Environmental Science and Engineering, Xiamen University of Technology, Xiamen

361024, China^1

关键词: Future climate;    Ground surfaces;    Hydrological cycles;    Open top chambers;    Qinghai Tibet plateau;    Terrestrial ecosystems;    Total precipitation;    Vapor pressure deficit;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/146/1/012011/pdf
DOI  :  10.1088/1755-1315/146/1/012011

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The impact of climate change on the cold region ecosystem is deepening, especially in the Qinghai-Tibet plateau(QTP), with its impacts on the water cycle. Evapotranspiration (ET), as an important part of the hydrological cycle in terrestrial ecosystems. Thus, we analyzed the influence of experimental warming on ET through observed data of 2008 under two open top chambers (OTC-1 and OTC-2) plots and ambient air (Control) plot. The study showed that the potential and actual ET of OTCs were higher than that of Control, due to increase in vapor pressure deficit, warmer air temperature, increase in ground surface soil moisture and temperature compared to the outside. ET is largest component of water loss from alpine ecosystem, accounted for 74.6% of the annual total precipitation. Elevated CO2concentration had no significantly affected at ET rate in our study. The results will be helpful for future climate change study in the QTP.