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Response of vegetation coverage on climate change in arid mountain of Northwest China


作者


摘要

Arid and semi-arid areas are very easily influenced by global warming because of the simple structure of landscape. The change of climate conditions affected the land vegetation coverage and its distribution in arid areas. As an indicator of vegetation growth and its spatial distribution, NDVI has a close relationship with climate conditions. Based on the remote sensing data GIMMS NDVI and software of ArcGIS, it was analyzed that the spatial-temporal correlations of NDVI with the precipitation and temperature in the Qilian Mountain located in the arid Northwest China in this paper from 1982 to 2003. The results showed that: (1) There was significant positive correlation between NDVI and temperature in the areas above the elevation of 2500 m, and significant negative correlation between NDVI and temperature in the areas below the elevation of 2500 m. (2) The value of NDVI was not visibly related with the precipitation in the both elevation areas. It can be concluded from the results that the vegetation coverage in lower elevation areas in Northwest China will be worse with the global warming.


关键词

  • ArcGIS
  • arid mountain
  • atmospheric precipitation
  • atmospheric temperature
  • climate change
  • climate changes
  • Ecosystems
  • geographic information systems
  • GIMMS NDVI
  • global warming
  • land surface
  • land vegetation coverage
  • Meteorology
  • NDVI
  • northwest China
  • Ocean temperature
  • principal component analysis
  • Qilian Mountain
  • rivers
  • Sea surface
  • semi-arid areas
  • Surface topography
  • Vegetation
  • vegetation coverage changes
  • vegetation growth
  • vegetation mapping

引用方式

Zhou L, Yang G, Ding Y, Wang J. Response of vegetation coverage on climate change in arid mountain of Northwest China[C]//Geoscience and Remote Sensing Symposium,2009 IEEE International,IGARSS 2009. 2009, 3: III–569–III–572. doi:10.1109/IGARSS.2009.5417821

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