SCIENTIA GEOGRAPHICA SINICA ›› 2013, Vol. 33 ›› Issue (5): 613-621.doi: 10.13249/j.cnki.sgs.2013.05.613

• Orginal Article • Previous Articles     Next Articles

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

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

CLC Number: 

  • TP79