干旱区生态环境知识资源中心(Arid): Grassland coverage inter-annual variation and its coupling relation with hydrothermal factors in China during 1982-2010

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	Grassland coverage inter-annual variation and its coupling relation with hydrothermal factors in China during 1982-2010
	Zhou Wei; Gang Chengcheng; Chen Yizhao; Mu Shaojie; Sun Zhengguo; Li Jianlong
来源期刊	Journal of Geographical Sciences
ISSN	1009-637X
出版年	2014
卷号	24 期号:4 页码:593-611
英文摘要	GIMMS (Global Inventory Modeling and Mapping Studies) NDVI (Normalised Difference Vegetation Index) from 1982 to 2006 and MODIS (Moderate Resolution Imaging Spectroradiometer) NDVI from 2001 to 2010 were blended to extract the grass coverage and analyze its spatial pattern. The response of grass coverage to climatic variations at annual and monthly time scales was analyzed. Grass coverage distribution had increased from northwest to southeast across China. During 1982-2010, the mean nationwide grass coverage was 34% but exhibited apparent spatial heterogeneity, being the highest (61.4%) in slope grasslands and the lowest (17.1%) in desert grasslands. There was a slight increase of the grass coverage with a rate of 0.17% per year. Increase in slope grasslands coverage was as high as 0.27% per year, while in the plain grasslands and meadows the grass coverage increase was the lowest (being 0.11% per year and 0.1% per year, respectively). Across China, the grass coverage with extremely significant increase (P<0.01) and significant increase (P<0.05) accounted for 46.03% and 11% of the total grassland area, respectively, while those with extremely significant and significant decrease accounted for only 4.1% and 3.24%, respectively. At the annual time scale, there are no significant correlations between grass coverage and annual mean temperature and precipitation. However, the grass coverage was somewhat affected by temperature in alpine and sub-alpine grassland, alpine and sub-alpine meadow, slope grassland and meadow, while grass coverage in desert grassland and plain grassland was more affected by precipitation. At the monthly time-scale, there are significant correlations between grass coverage with both temperature and precipitation, indicating that the grass coverage is more affected by seasonal fluctuations of hydrothermal conditions. Additionally, there is one-month time lag-effect between grass coverage and climate factors for each grassland types.
英文关键词	grass coverage climate factors spatial-temporal dynamic correlation time lag effect
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:5119338
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335348
作者单位	Zhou Wei, School of Life Science, Nanjing University, Nanjing, Jiangsu 210093, China.; Gang Chengcheng, School of Life Science, Nanjing University, Nanjing, Jiangsu 210093, China.; Chen Yizhao, School of Life Science, Nanjing University, Nanjing, Jiangsu 210093, China.; Mu Shaojie, School of Life Science, Nanjing University, Nanjing, Jiangsu 210093, China.; Li Jianlong, School of Life Science, Nanjing University, Nanjing, Jiangsu 210093, China.; Sun Zhengguo, College of Animal Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China.
推荐引用方式 GB/T 7714	Zhou Wei,Gang Chengcheng,Chen Yizhao,et al. Grassland coverage inter-annual variation and its coupling relation with hydrothermal factors in China during 1982-2010[J],2014,24(4):593-611.
APA	Zhou Wei,Gang Chengcheng,Chen Yizhao,Mu Shaojie,Sun Zhengguo,&Li Jianlong.(2014).Grassland coverage inter-annual variation and its coupling relation with hydrothermal factors in China during 1982-2010.Journal of Geographical Sciences,24(4),593-611.
MLA	Zhou Wei,et al."Grassland coverage inter-annual variation and its coupling relation with hydrothermal factors in China during 1982-2010".Journal of Geographical Sciences 24.4(2014):593-611.