Resources Ecology

Spatial Differences of Variations in Autumn Fractional Vegetation Coverage in Eastern China during 1982-2006

  • Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China

Received date: 2012-04-11

  Revised date: 2012-07-09

  Online published: 2013-01-19


To understand the variations in fractional vegetation coverage (FVC) over eastern China in autumn during 1982-2006 deeply, we analyzed the mean spatial pattern of Normalized Difference Vegetation Index (NDVI) in autumn, discriminated the models of variations in autumn NDVI during 1982-2006 by cluster analysis and studied the correlations between variations in autumn NDVI and temperature and precipitation. The results show that: 1) The mean FVC over eastern China in autumn decreased spatially in the order of forest, farmland and grassland, and it is obvious that the regional mean FVC increased before 1998 while decreased thereafter. 2) During 1982-2006, different regional FVC changes were marked by large differences. The variations in FVC within the study area could be summarized as 6 models, which consist of a rising trend with fluctuations in Northeast China, a rising trend with fluctuations before 1998 and a sharp drop thereafter in the northeast of Inner Mongolia Plateau, a sharp transition from mean lower FVC to higher FVC in 1994 in the north of North China and the south of Northeast China, a conversion from a decreasing trend during 1982-2000 to slight rising trend after 2000 in the south of North China, a conversion from a rising trend with inter-annual fluctuation before 1992 to a decreasing trend with inter-annual fluctuation thereafter in Jiang-Huai area, a sharp transition from mean higher FVC to lower FVC in 2000 in the Yangtze River and areas south of it. 3) Excepting for the northeast of Inner Mongolia Plateau where FVC was significantly correlated with precipitation and 66% of inter-annual variation in FVC could be explained by precipitation, a positive significant correlation between FVC and precipitation could be found in northes of the North China and the south of Northeast China and a positive significant correlation between FVC and temperature could be found in areas along Qinling-Daba Mountains-middle reaches of the Yangtze River, however, temperature or precipitation could only explain 21% of inter-annual variation in FVC; in addition, no significant correlation between FVC and temperature/precipitation could be found in the others regions.

Cite this article

ZHANG Xue-zhen, ZHENG Jing-yun, HE Fan-neng, DAI Jun-hu . Spatial Differences of Variations in Autumn Fractional Vegetation Coverage in Eastern China during 1982-2006[J]. JOURNAL OF NATURAL RESOURCES, 2013 , 28(1) : 28 -37 . DOI: 10.11849/zrzyxb.2013.01.004


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