Interannual variation in grassland net ecosystem productivity and its coupling relation to climatic factors in China

doi:10.1007/s10653-018-0236-3

	Interannual variation in grassland net ecosystem productivity and its coupling relation to climatic factors in China
	Zhou, Wei 1,3; Huang, Lu 1; Yang, Han 1; Ju, Weimin 2; Yue, Tianxiang 3
刊名	ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
	2019-06-01
卷号	41 期号:3 页码:1583-1597
关键词	Grassland carbon source sink Water use efficiency Carbon conversion efficiency BEPS model Return grazing land to grassland
ISSN号	0269-4042
DOI	10.1007/s10653-018-0236-3
通讯作者	Zhou, Wei(zhouw866@163.com)
英文摘要	Grassland, as an important part of land cover, plays an important role in the global carbon cycle and carbon balance. Net ecosystem productivity (NEP) is a key indicator of the carbon cycle process and an important factor in assessing ecosystem security and maintaining ecosystem balance. In this paper, Boreal Ecosystem Productivity Simulator (BEPS) combining meteorological data, leaf area index, and land cover type data were used to simulate the grassland NEP of China from 1979 to 2008. This model was also used to analyze the responses to changes in climate factors, interannual variation in carbon conversion efficiency, drought stress coefficient, and water use efficiency of grassland in China. Results showed that from 1979 to 2008, the mean annual grassland NEP was 13.6 g C/m(2) with weak carbon sinks. The grassland NEP distribution increased from northwest to southeast across China. Regions with NEP of > 0 (C sink) accounted for 73.1% of the total grassland area of China. The total C sequestration reached 26.6 Tg yearly, and grassland NEP was positive from 1979 to 2008. The annual changing characteristics were analyzed. Grassland NEP was positive with carbon sink from June to September, which was negative with carbon source in the remaining months. The carbon conversion efficiency and water use efficiency of the grassland increased significantly within 30 years. NEP showed positive correlation with precipitation (accounting for 74.2% of the total grassland area was positively correlated) but weakly positive correlation with temperature (50.2% of the case). Furthermore, significant positive correlation was found between grassland NEP and precipitation, especially in northeastern and central Inner Mongolia, northern Tianshan of Xinjiang, southwestern Tibet, and southern Qinghai Lake.
资助项目	basic science and advanced technology Fund of Chongqing Scientific Council[cstc2016jcyjA1540] ; National Youth Science Fund[41501575] ; National Youth Science Fund[41701227] ; Fundamental Research Program of Chongqing Municipal Education Commission[KJQN201800702] ; Fundamental Research Program of Chongqing Municipal Education Commission[KJ1705114] ; National Key R&D Program of China[2018YFD1100301]
WOS关键词	LEYMUS CHINENSIS STEPPE ; CARBON FLUXES ; SOIL RESPIRATION ; LAND-SURFACE ; CO2 ; MANAGEMENT ; MODEL ; PRECIPITATION ; EXCHANGE ; WATER
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Public, Environmental & Occupational Health ; Water Resources
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000482428000032
资助机构	basic science and advanced technology Fund of Chongqing Scientific Council ; National Youth Science Fund ; Fundamental Research Program of Chongqing Municipal Education Commission ; National Key R&D Program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/69633]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhou, Wei
作者单位	1.Chongqing Jiaotong Univ, Coll Architecture & Urban Planning, Chongqing 400074, Peoples R China 2.Nanjing Univ, Int Inst Earth Syst Sci, Nanjing 210093, Jiangsu, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Wei,Huang, Lu,Yang, Han,et al. Interannual variation in grassland net ecosystem productivity and its coupling relation to climatic factors in China[J]. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH,2019,41(3):1583-1597.
APA	Zhou, Wei,Huang, Lu,Yang, Han,Ju, Weimin,&Yue, Tianxiang.(2019).Interannual variation in grassland net ecosystem productivity and its coupling relation to climatic factors in China.ENVIRONMENTAL GEOCHEMISTRY AND HEALTH,41(3),1583-1597.
MLA	Zhou, Wei,et al."Interannual variation in grassland net ecosystem productivity and its coupling relation to climatic factors in China".ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 41.3(2019):1583-1597.