1998~2008年中国东部沿海植被覆盖变化特征
Character of Vegetation Cover Change in China's Eastern Coastal Areas 1998-2008
查看参考文献23篇
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文摘
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基于1998~2008年的SPOT-VGT数据,利用CVA,一元线性回归,Hurst指数等方法分析中国东部沿海植被覆盖变化特征及趋势,并编制植被覆盖退化特征图谱.研究表明:植被覆盖总体呈上升趋势,高变化和中变化区比例合计达26.23%;与此同时,退化区也大量分布;植被覆盖变化的自相似性和长程依赖性突出,区域尺度Hurst指数高达0.84,增长趋势可持续,像元尺度Hurst指数普遍较高,但空间格局比较复杂;未来植被覆盖趋于恶化的面积约占10.58%,三大都市圈及部分海岸带区域严重退化并将持续退化,众多中小城市周边中度退化并将持续退化 |
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其他语种文摘
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The character and trends of vegetation cover change in China's eastern coastal areas during 1998 2008 has been studied based on the SPOT-VGT data and MVC method, Change Vector Analysis(CVA), linear regression, Hurst index and Spatial Analysis techniques. And the degradation map of vegetation cover has been mapped on the 1 km2 spatial scale. It showed that:(1) The vegetation cover greatly increased between 1998 and 2008, and prominently, before and after 2003, there were two different temporal stages.(2) The CVA for the 10-year scale showed that areas with mid-high to high degree of vegetation type change amounted to 26.23% of the whole study area, and areas with high degree mainly included the joint part of Shandong Province and Hebei Province, the northwestern part of Jiangsu Province, the Shanghai metropolitan area, the eastern coastal zone of Taiwan island, the mid-part of Hainan island and some parts of Guangdong Province and Guangxi Province. The comparison of CVA for the two 5-year periods showed that the density and extent of vegetation cover change between 1999 and 2003 was much acute than that between 2004 and 2008.(3) Although the improved area of vegetation cover was widely spread, there were areas where vegetation cover had degenerated markedly between 1998 and 2008, such as the three metropolitan areas and the mountainous areas in Zhejiang Province and Fujian Province.(4) There was evident self-similarity and long-range dependence of vegetation cover change, and the Hurst index of the whole study area amounted to 0.8437, which indicated that the increase of the vegetation cover would show distinct sustainability in the future. The Hurst index matrix calculated on the 1 km2 cell scale was high generally, and its spatial patterns were very complex. For example, the areas with low values of Hurst index include the northern part of Jiangsu Province, the mid-western part of Guangxi Province, the southern part of Hebei Province, the northeasterm part of Liaoning Province and the southwestern part of Shandong Province, which indicated that the change directions of vegetation cover would show anti-sustainability.(5) The degradation map of vegetation cover showed that 10.58% of the whole study area would be the key areas that vegetation cover will go on degenerating in the future |
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来源
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地理科学
,2010,30(5):735-741 【核心库】
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关键词
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植被覆盖
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Spot-VGT
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变化矢量分析
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Hurst指数
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退化特征图谱
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东部沿海
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地址
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中国科学院烟台海岸带研究所, 山东, 烟台, 264003
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-0690 |
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学科
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环境质量评价与环境监测 |
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基金
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中国科学院知识创新工程重要方向项目
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中国科学院"十一五"e-Science应用示范项目
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国家自然科学基金项目
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文献收藏号
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CSCD:4056196
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