Spatiotemporal Variability and Driving Factors of Tibetan Plateau Water Use Efficiency

doi:10.1029/2020JD032642

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Spatiotemporal Variability and Driving Factors of Tibetan Plateau Water Use Efficiency
	Lin, Shan 2,3; Wang, Genxu 1; Hu, Zhaoyong 1,2; Huang, Kewei 2,3; Sun, Juying 2,3; Sun, Xiangyang 1
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
	2020
卷号	125 期号:22 页码:e2020JD032642
关键词	water use efficiency environmental impacts Tibetan Plateau land surface modeling
ISSN号	2169-897X
DOI	10.1029/2020JD032642
通讯作者	Wang, Genxu(wanggx@scu.edu.cn) ; Hu, Zhaoyong(huzy@scu.edu.cn)
产权排序	1
文献子类	Article
英文摘要	Water use efficiency (WUE) provides vital information about the carbon-water coupling relationship of a terrestrial ecosystem. Understanding the spatiotemporal variability and driving factors of the Tibetan Plateau (TP) WUE can facilitate the prediction of the response of the carbon-water process in the TP to climate change. We used a land surface model to investigate spatiotemporal changes in WUE and the responses to environmental factors, such as atmospheric CO2 concentration and climate and land use change. Our results suggest that the average annual TP WUE was 0.38 g C kg(-1) H2O and that this variable tended to increase at a rate of 0.001 g C kg(-1) H2O year(-1) during the period of 1979-2010. Changes in atmospheric CO2 concentration caused a significant increase in the rate of WUE change (i.e., 0.00051 g C kg(-1) H2O year(-1)); these changes were also found to most significantly contribute to WUE increase in the TP and account for approximately 51% of the WUE fluctuation. Increasing temperature was found to result in a decreasing WUE (rate: -0.00028 g C kg(-1) H2O year(-1)). Regarding results on vegetation type, forested areas had the highest WUE (i.e., 0.88 g C kg(-1) H2O) and the highest rate of WUE change (i.e., 0.004 g C kg(-1) H2O year(-1)), whereas the lowest WUE (i.e., 0.26 g C kg(-1) H2O) was found in steppe and alpine vegetation areas. Although all other vegetation types were associated with increasing WUE, there was no significant change in the WUE of steppe areas. The main factors influencing WUE fluctuation for different vegetation types were found to be atmospheric CO2 concentration and temperature change.
电子版国际标准刊号	2169-8996
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDA20050102] ; National Natural Science Foundation of China[41890821] ; Sanjiangyuan National Park Joint Research Program of Chinese Academy of Sciences ; People's Government of Qinghai Province[LHZX-2020-10]
WOS关键词	ALPINE GRASSLANDS ; ATMOSPHERIC CO2 ; CARBON BALANCE ; CLIMATE-CHANGE ; ECOSYSTEM ; EVAPOTRANSPIRATION ; IMPACTS ; CHINA ; CYCLE
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000595725700013
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; Sanjiangyuan National Park Joint Research Program of Chinese Academy of Sciences ; People's Government of Qinghai Province
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/54929]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Wang, Genxu; Hu, Zhaoyong
作者单位	1.State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu, China 2.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China; 3.University of Chinese Academy of Sciences, Beijing, China;
推荐引用方式 GB/T 7714	Lin, Shan,Wang, Genxu,Hu, Zhaoyong,et al. Spatiotemporal Variability and Driving Factors of Tibetan Plateau Water Use Efficiency[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2020,125(22):e2020JD032642.
APA	Lin, Shan,Wang, Genxu,Hu, Zhaoyong,Huang, Kewei,Sun, Juying,&Sun, Xiangyang.(2020).Spatiotemporal Variability and Driving Factors of Tibetan Plateau Water Use Efficiency.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,125(22),e2020JD032642.
MLA	Lin, Shan,et al."Spatiotemporal Variability and Driving Factors of Tibetan Plateau Water Use Efficiency".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 125.22(2020):e2020JD032642.