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Remote Sensing Technology and Application  2011, Vol. 26 Issue (6): 782-790    DOI: 10.11873/j.issn.1004-0323.2011.6.782
    
Temporal Variation of Vegetation in Songmuxicuo Basin as Detected by MODIS Remote Sensing during 2001~2010
Wu Xuejiao1,3,Lu Anxin1,2,Wang Lihong1,3,Zhang Huawei1,3
(1.State Key Laboratory of Cryospheric Sciences,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China;2.Center for Earth Observation and Digital Earth,Chinese Academy of Sciences,Beijing 100094,China;3.Graduate University of Chinese Academy of Sciences,Beijing 100049,China)
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Abstract  

Remote sensing plays an important role in regional vegetation change research and provides new technical possibilities for global vegetation temporal and spatial variation.NDVI is supersaturated in regions with good vegetation,but is so sensitive in areas with sparse vegetation cover.We selected Songmuxicuo basin with sparse vegetation in the south of Guliya Ice Cap as our research region,and used NDVI dataset derived from imagery obtained from the Moderate Resolution Imaging Spectroradiometer (MODIS) to build the time series of vegetation change in recent 10 years based on RS and GIS technology.Then we analysed the relationship between vegetation change and climatic factors.① The change demonstrated that the area of vegetation covers increase in recent 10 years in south of Guliya Ice Cap in Tibet an Plateau.② NDVI character showed that the grow season is short,and the NDVI floating interval is 0.11~0.13,lower than nationwide level(0.3~0.35),also lower than global open shrublands mean NDVI(0.2~0.4).③ The correlation analysis between NDVI with the temperature and precipitation in the south of Guliya Ice Cap was carried out.There was significant positive correlation between NDVI and temperature and precipitation was not strong correlation relatively with NDVI in the region.It implied that the increasing temperature recent years is the mean factor to make vegetation covers increase in the region.

Key words:  NDVI      Temperature      Remote sensing      Songmuxicuo basin     
Received:  08 May 2011      Published:  10 January 2012
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Wu Xuejiao,Lu Anxin,Wang Lihong,Zhang Huawei. Temporal Variation of Vegetation in Songmuxicuo Basin as Detected by MODIS Remote Sensing during 2001~2010. Remote Sensing Technology and Application, 2011, 26(6): 782-790.

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http://www.rsta.ac.cn/EN/10.11873/j.issn.1004-0323.2011.6.782     OR     http://www.rsta.ac.cn/EN/Y2011/V26/I6/782

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