气候变化领域集成服务门户(CCPortal): Spatio-temporal variations in water use efficiency and its drivers in China over the last three decades

CCPortal

DOI	10.1016/j.ecolind.2018.07.003
	Spatio-temporal variations in water use efficiency and its drivers in China over the last three decades
	Sun, Shaobo; Song, Zhaoliang; Wu, Xiuchen; Wang, Tiejun; Wu, Yuntao; Du, Wenli; Che, Tao; Huang, Chunlin; Zhang, Xuejun; Ping, Bo; Lin, Xiaofeng; Li, Pan; Yang, Yaoxian; Chen, Baozhang
发表日期	2018
ISSN	1470-160X
EISSN	1872-7034
起始页码	292
结束页码	304
卷号	94
英文摘要	Ecosystem water use efficiency (WUE) reflects the intimately coupled relationship between the carbon and water cycles in terrestrial ecosystems. However, the inter-annual variation and its drivers of WUE are poorly understood at regional/global scale, due to either limited data availability or uncertainties in current data streams. In this study, we used process-based models simulated gross primary productivity (GPP) and evapotranspiration (ET) data to estimate the ecosystem WUE (eWUE, GPP/ET) in China for 1979-2012. The eWUE estimates were validated against eddy covariance-based values from 35 flux towers. The inter-annual variation of the eWUE was quantified and its responses to annual precipitation (AP), annual mean temperature (AMT), and annual mean leaf area index (AMLAI) were analyzed. The key findings were as follows. (i) The mean annual eWUE over China was 1.48 +/- 1.04 g C kg(-1) H2O and had a slightly increasing but not significant trend (7.32 x 10(-4)g C kg(-1) H2O yr(-1), p < 0.05) from 1979 to 2012. (ii) The spatial distribution of the eWUE trend showed large spatial variability. similar to 21.4% and similar to 19.0% of vegetated land in China had significant increasing and decreasing trends (Mann-Kendall test, p < 0.1), respectively. The increasing eWUE was mainly found in the northeast, southwest, and central areas of China, while the decreasing eWUE was mostly distributed in west China. (iii) The inter annual variation of the spatially averaged annual eWUE was negatively correlated with that of AP and AMT, and positively correlated with that of AMLAI. In similar to 41.4%, similar to 9.9%, and similar to 3.1% of vegetated land in China the inter annual variation of eWUE was dominated by the inter-annual variations of AP, AMT, and AMLAI, respectively. In most land of north China and west China the inter-annual variation of eWUE was dominated by the inter-annual variation of AP, while in central, east and south China all the AP, AMT, AMLAI, and other drivers played important roles.
英文关键词	Water use efficiency (WUE); Process-based model; Gross primary productivity (GPP); Evapotranspiration (ET); Inter-annual variation
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS关键词	GROSS PRIMARY PRODUCTION ; TERRESTRIAL ECOSYSTEMS ; EDDY-COVARIANCE ; PRIMARY PRODUCTIVITY ; CARBON FLUXES ; CO2 EXCHANGE ; CLIMATE ; EVAPOTRANSPIRATION ; MODEL ; MODIS
WOS记录号	WOS:000452692500030
来源期刊	ECOLOGICAL INDICATORS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/241064
作者单位	[Sun, Shaobo; Song, Zhaoliang; Wang, Tiejun; Wu, Yuntao; Du, Wenli; Ping, Bo] Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China; [Wu, Xiuchen] Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China; [Wu, Xiuchen] Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China; [Che, Tao; Huang, Chunlin] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Heihe Remote Sensing Expt Res Stn, Lanzhou 730000, Gansu, Peoples R China; [Che, Tao; Huang, Chunlin; Lin, Xiaofeng; Li, Pan; Yang, Yaoxian; Chen, Baozhang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Zhang, Xuejun] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China; [Lin, Xiaofeng; Chen, Baozhang] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China; [Li, Pan] Chinese Acad Sci, Inst Geochem, State K...
推荐引用方式 GB/T 7714	Sun, Shaobo,Song, Zhaoliang,Wu, Xiuchen,et al. Spatio-temporal variations in water use efficiency and its drivers in China over the last three decades[J]. 中国科学院西北生态环境资源研究院,2018,94.
APA	Sun, Shaobo.,Song, Zhaoliang.,Wu, Xiuchen.,Wang, Tiejun.,Wu, Yuntao.,...&Chen, Baozhang.(2018).Spatio-temporal variations in water use efficiency and its drivers in China over the last three decades.ECOLOGICAL INDICATORS,94.
MLA	Sun, Shaobo,et al."Spatio-temporal variations in water use efficiency and its drivers in China over the last three decades".ECOLOGICAL INDICATORS 94(2018).