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中国沙漠 ›› 2013, Vol. 33 ›› Issue (3): 918-927.DOI: 10.7522/j.issn.1000-694X.2013.00129

• 生态与经济 • 上一篇    下一篇

1982—2006年蒙古高原植被覆盖时空变化分析

包 刚1,2, 覃志豪1,3, 包玉海2, 周 义1   

  1. 1.南京大学 国际地球系统科学研究所, 江苏 南京 210093;
    2.内蒙古师范大学 内蒙古自治区遥感与地理信息系统重点实验室, 内蒙古 呼和浩特 010022;
    3.中国农业科学院农业资源与农业区划研究所, 北京 100081
  • 收稿日期:2012-01-10 修回日期:2012-03-19 出版日期:2013-05-20 发布日期:2012-03-19

Spatial-temporal Changes of Vegetation Cover in Mongolian Plateau during 1982—2006

BAO Gang1,2, QIN Zhi-hao1,3, BAO Yu-hai2, ZHOU Yi1   

  1. 1.International Institute for Earth System Science, Nanjing University, Nanjing 210093, China;
    2.Inner Mongolian Key Laboratory of Remote Sensing and Geographic Information System, Inner Mongolia Normal University, Hohhot 010022, China;
    3.Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2012-01-10 Revised:2012-03-19 Online:2013-05-20 Published:2012-03-19

摘要:

在利用HANTS方法对GIMMS NDVI数据进行时间序列平滑处理的基础上,对蒙古高原1982—2006年植被覆盖时空动态变化进行了分析。结果表明:蒙古高原植被覆盖年平均上升趋势为0.0004\5a-1,其中蒙古国的上升趋势(0.0005\5a-1)比中国内蒙古(0.0003\5a-1)更加显著,而内蒙古多年平均NDVI比蒙古国高0.0433;从不同类型植被NDVI变化趋势看,除森林和戈壁荒漠的NDVI变化趋势较平稳外,草地、农田和灌丛均呈显著的上升趋势;从空间分布趋势看,在过去的25年内植被覆盖呈增加趋势的地区主要分布在高原南部——内蒙古农牧交错区和蒙古国中、西和北部的山脉及其环抱的大湖盆地地区,而植被覆盖呈下降趋势的地区主要集中在高原中部的干旱地带和东部呼伦贝尔地区;从时间推移规律看,蒙古高原植被覆盖在4个不同研究时间段内(20世纪80年代、90年代、21世纪初和过去25年间)呈增加(包括显著增加)趋势的面积均大于呈下降趋势的面积,且其面积按20世纪80年代<90年代<21世纪初的顺序依次增加。

关键词: 蒙古高原, GIMMS NDVI, 植被覆盖, 时空变化

Abstract:

The spatial and temporal changes of vegetation cover in Mongolian plateau were analyzed by employing the time-series of HANTS-smoothed GIMMS NDVI from 1982 to 2006. The results indicated that the annual increasing trend of vegetation cover in Mongolian Plateau was 0.0004 \5a-1, and the increasing trend in Mongolia (0.0005\5a-1) was more significant than that in Inner Mongolia (0.0003\5a-1), while the multi-year mean NDVI in Inner Mongolia is 0.0433 higher than in Mongolia; For the different vegetation types, besides the change trend of NDVI in forest and Gobi-desert was relatively stable, grassland, farmland and shrub experienced significant increasing trends; At spatial scale, regions with increased vegetation cover were distributed in south of Mongolian Plateau, i.e the farming-pastoral ecotone of Inner Mongolia, and central, western and northern mountains and its surrounded big-lake basins in Mongolia, while regions with decline in vegetation cover were concentrated on central arid area in Mongolian Plateau and Hulunbeier regions. At temporal scale, area with increasing trend in vegetation cover was larger than area with decreasing trend for four different study period in Mongolian Plateau, and the sort of area with increasing trend was 1980s<1990s<2000s.

Key words: Mongolian Plateau, GIMMS NDVI, vegetation cover, spatial and temporal changes

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