地理科学 ›› 2013, Vol. 33 ›› Issue (5): 613-621.doi: 10.13249/j.cnki.sgs.2013.05.613

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近10年蒙古高原植被覆盖变化及其对气候的季节响应

包刚1,2(), 包玉海1(), 覃志豪2, 周义2, Shiirev-Adiya3   

  1. 1. 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
    2. 南京大学国际地球系统科学研究所, 江苏 南京 210093
    3. 蒙古国科学院地理研究所, 蒙古国 乌兰巴托 14192
  • 收稿日期:2012-09-19 修回日期:2012-11-17 出版日期:2013-05-20 发布日期:2013-05-20
  • 作者简介:

    作者简介:包刚(1978-),男,内蒙古库伦旗人,博士研究生,主要从事遥感与地理信息系统应用研究。E-mail: baogang@imnu.edu.cn

  • 基金资助:
    国家自然科学基金项目(41161060、41261099)、内蒙古自然科学基金项目(2012MS0607)资助

Vegetation Cover Changes in Mongolian Plateau and Its Response to Seasonal Climate Changes in Recent 10 Years

Gang BAO1,2(), Yu-hai BAO1(), Zhi-hao QIN2, Yi ZHOU2, Shiirev-Adiya3   

  1. 1.Inner Mongolian Key Laboratory of Remote Sensing and Geographic Information System,Inner Mongolia Normal University,Huhhot, Inner Mongolia 010022, China
    2. International Institute for Earth System Science,Nanjing University,Nanjing,Jiangsu 210093, China
    3. Institute of Geography,Mongolian Academy of Science,Ulaanbaatar 14192,Mongolia
  • Received:2012-09-19 Revised:2012-11-17 Online:2013-05-20 Published:2013-05-20

摘要:

利用2001~2010年间MODIS NDVI数据、同期气象数据和MODIS土地覆盖分类产品,探讨蒙古高原植被覆盖变化趋势及其对气温和降水量的季节响应特征。结果表明,10 a来,蒙古高原植被覆盖度呈增加趋势和呈下降趋势的面积基本持平;春季和夏季植被覆盖度呈下降趋势,而秋季呈上升趋势,降水量是最主要的影响因子;在秋季5种植被类型均呈增加趋势,而在春季和夏季不同植被类型的增减趋势因植被类型而异。

关键词: 蒙古高原, MODIS NDVI, 植被变化, 气候响应

Abstract:

The change trend of vegetation cover in Mongolian plateau and its response to seasonal temperature and precipitation were analyzed by employing MODIS NDVI in 2001-2010, composed by 16 day maximum value synchronous climate variables and MODIS land cover product MCD12Q1. The result indicated that the area of vegetation cover increased which was similar to that of vegetation cover decreased, reaching 43.75% and 42.22% of the total area of Mongolian plateau, respectively. In recent 10 years, the vegetation cover decreased in spring and summer, while increased in autumn. The correlation analysis between seasonal NDVI and corresponding seasonal climate factors showed that the correlativity between NDVI and precipitation was significant in spring and summer (P=0.02 in spring, P=0.003 in summer), and the correlation coefficient between NDVI and precipitation in autumn also reached 90% confidence level, indicating that precipitation was a main factor of influencing vegetation cover changes in Mongolian plateau. It was found that five different vegetation types experienced increasing trend in autumn, vegetation changes in Gobi-desert experienced increasing trend in all 3 seasons.NDVI of forest, grassland and shrub decreased in spring and summer, while farmland decreased in spring and increased in summer.

Key words: Mongolian plateau, MODIS NDVI, vegetation changes, response to climate change

中图分类号: 

  • TP79