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Interannual variation in grassland net ecosystem productivity and its coupling relation to climatic factors in China
Zhou, Wei1,2; Huang, Lu1; Yang, Han1; Ju, Weimin3; Yue, Tianxiang2
2019-06-01
Source PublicationENVIRONMENTAL GEOCHEMISTRY AND HEALTH
ISSN0269-4042
Volume41Issue:3Pages:1583-1597
Corresponding AuthorZhou, Wei(zhouw866@163.com)
AbstractGrassland, 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.
KeywordGrassland carbon source sink Water use efficiency Carbon conversion efficiency BEPS model Return grazing land to grassland
DOI10.1007/s10653-018-0236-3
WOS KeywordLEYMUS CHINENSIS STEPPE ; CARBON FLUXES ; SOIL RESPIRATION ; LAND-SURFACE ; CO2 ; MANAGEMENT ; MODEL ; PRECIPITATION ; EXCHANGE ; WATER
Indexed BySCI
Language英语
Funding Projectbasic 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]
Funding Organizationbasic 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
WOS Research AreaEngineering ; Environmental Sciences & Ecology ; Public, Environmental & Occupational Health ; Water Resources
WOS SubjectEngineering, Environmental ; Environmental Sciences ; Public, Environmental & Occupational Health ; Water Resources
WOS IDWOS:000482428000032
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/69634
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhou, Wei
Affiliation1.Chongqing Jiaotong Univ, Coll Architecture & Urban Planning, Chongqing 400074, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China
3.Nanjing Univ, Int Inst Earth Syst Sci, Nanjing 210093, Jiangsu, Peoples R China
Recommended Citation
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.
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