| 基于10年MODIS数据的锡林郭勒盟草原植被覆盖度变化监测 |
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| 引用本文： | 王颖,张科利,李峰.基于10年MODIS数据的锡林郭勒盟草原植被覆盖度变化监测[J].干旱区资源与环境,2012(9):165-169. |
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| 作者姓名： | 王颖 张科利 李峰 |
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| 作者单位： | 地表过程与资源生态国家重点实验室北京师范大学地理学与遥感科学学院;国家林业局调查规划设计院 |
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| 基金项目： | 国家林业局林业公益性行业科研项目“沙尘暴灾害风险评估与区划研究”(200804020)资助 |
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| 摘 要： | 以MODIS长时间序列的植被指数产品为数据源,利用像元二分模型研究了2000～2009年8月锡林郭勒盟草原的植被覆盖度及其时空变化特征。并采用转移矩阵的方法,分析了年份间覆盖度高低变化的方向。结果表明:从2000至2008年锡林郭勒草原植被覆盖度总体呈上升趋势;在2000～2004年和2004～2008年两段时期内,均有较低植被覆盖度向较高植被覆盖度转化的趋势,后一时期覆盖度较低的植被恢复比前一时期好;低覆盖度区植被好转趋势明显,但高植被覆盖区存在轻微的退化现象;与往年相比,2009年因汛期干旱天气植被覆盖度明显降低。
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| 关 键 词： | 植被覆盖度 像元二分模型 MODIS 锡林郭勒盟 |
Monitoring of fractional vegetation cover change in Xilingol League based on MODIS data over 10 years |
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| WANG Ying,ZHANG Keli,LI Feng.Monitoring of fractional vegetation cover change in Xilingol League based on MODIS data over 10 years[J].Journal of Arid Land Resources and Environment,2012(9):165-169. |
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| Authors: | WANG Ying ZHANG Keli LI Feng |
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| Institution: | 1.State Key Laboratory of Earth Surface Processes and Resource Ecology,School of Geography and Remote Sensing Science,Beijing Normal University,Beijing 100875,P.R.China;2.Academy of Forest Inventory and Planning,Beijing 100714,P.R.China) |
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| Abstract: | In this paper,MODIS-NDVI was selected as the data source to discuss the fractional vegetation cover using the two sub-pixel model with its spatial-temporal changes in Xilingol League from 2000 to 2009,and its change direction was analyzed by using transfer matrix.The results showed that the fractional vegetation cover generally increased from 2000 to 2008.In the periods of 2000 ~ 2004 and 2004 ~ 2008,a trend of low fractional vegetation cover areas transforming to high fractional vegetation cover areas could be discovered.Additionally,the vegetation recovery rate of the low fractional vegetation cover areas was higher in the later period.At the same time some parts of the high fractional vegetation cover area decreased slightly.The fractional vegetation cover in 2009 was lower than previous years because of drought weather in flood season. |
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| Keywords: | fractional vegetation cover two sub-pixel model MODIS Xilingol League |
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