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Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (8): 123-131.doi: 10.11924/j.issn.1000-6850.casb2020-0197

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Remote Sensing Monitoring of Vegetation Change in Central Asia from 2000 to 2017

Guo Yan1(), He Yi1,2,3(), Zhang Lifeng1,2,3, Qiu Lisha1,2,3, Zhang Guoqiang1, Zhang Zhihua1,2,3   

  1. 1Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070
    2National-local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring, Lanzhou 730070
    3Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou 730070
  • Received:2020-06-21 Revised:2020-09-21 Online:2021-03-15 Published:2021-03-16
  • Contact: He Yi E-mail:1372205339@qq.com;heyi8738@163.com

Abstract:

Vegetation in Central Asia plays an important role in the protection of regional ecological security and the construction of “The Silk Road Economic Belt”. However, the influence of climate on vegetation growth mode in Central Asia is still not clear. Based on the index of NDVI combined with meteorology, terrain and population data, we studied the time-space distribution rule and change trend of the vegetation in Central Asia for nearly 18 years and confirmed the correlation between the vegetation change and different influencing factors, and predicted roughly the future growth trend of the vegetation. The results showed that the whole vegetation in Central Asia between 2000 and 2017 presented a decreasing trend, mainly distributed in the middle area and south-western area and along the mountains. The vegetation in west slope was stronger than that in east slope. In 2010, the vegetation was changed from degradation trend to improving trend as a whole. The precipitation and temperature had a promotion role for the vegetation growth, but vegetation was more sensitive to precipitation than to temperature. In the future, the vegetation in Central Asia will show an improving trend on the whole. In addition, different geographical demarcation and human activities will have certain influence on vegetation.

Key words: central Asia, dynamic trend of vegetation, MODIS NDVI, correlation analysis, human activities

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