| 利用MODIS数据进行旱情动态监测研究 |
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| 引用本文： | 卢远,华璀,韦燕飞.利用MODIS数据进行旱情动态监测研究[J].地理与地理信息科学,2007,23(3):55-58. |
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| 作者姓名： | 卢远 华璀 韦燕飞 |
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| 作者单位： | 1. 中国科学院成都山地灾害与环境研究所,四川,成都,610041;广西师范学院资源环境学院,广西,南宁,530001
2. 广西师范学院资源环境学院,广西,南宁,530001 |
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| 基金项目： | 国家自然科学基金
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广西青年科学基金 |
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| 摘 要： | MODIS-EVI植被指数与不同覆盖程度植被的线性关系已得到明显改善,可以更有效地反映地表植被的生长状态。利用MODIS合成数据MYD11A2和MYD13A2获取的增强型植被指数(EVI)和陆地表面温度(Ts)构建EVI-Ts特征空间,并以该特征空间计算的温度植被干旱指数(TVDI)作为干旱监测指标,分析广西2006年秋旱分布。结果表明:以地表温度和MODIS-EVI为基础的温度植被干旱指数能较好地反映区域旱情分布和旱情发展过程,2006年9月中旬—11月中旬广西受旱区域不断扩大,旱情持续加重。
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| 关 键 词： | MODIS 增强型植被指数 地表温度 温度植被干旱指数 |
| 文章编号： | 1672-0504（2007）03-0055-04 |
| 修稿时间： | 2006-12-262007-01-29 |
Dynamic Drought Monitoring Using MODIS Product |
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| LU Yuan,HUA Cui,WEI Yan-fei.Dynamic Drought Monitoring Using MODIS Product[J].Geography and Geo-Information Science,2007,23(3):55-58. |
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| Authors: | LU Yuan HUA Cui WEI Yan-fei |
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| Institution: | 1 . Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041 ; 2. Faculty of Resources and Environmental Sciences, Guangxi Teachers College, Nanning 530001 , China |
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| Abstract: | The MODIS Enhanced Vegetation Index(EVI) has obviously improved its linearity with vegetation in different cover,it is better to indicate the characteristics of vegetation cover.In this paper,the MODIS land surface temperature product(MYD11A2) and vegetation index(MYD13A2) product were used to establish EVI-Ts space.A simplified Temperature Vegetation Dryness Index(TVDI) from EVI-Ts space was presented to evaluate agriculture drought in Guangxi,located in southern China,from the middle ten days of September to the middle ten days of November in 2006.Based on the information of TVDI,the agricultural drought in Guangxi was analyzed.It was found that the TVDI from the EVI-Ts space can effectively indicate the spatial distribution and temporal evolution of drought,and the area of drought in Guangxi was evidently increasing during the middle ten days of September to the middle ten days of November in 2006. |
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| Keywords: | MODIS enhanced vegetation index land surface temperature temperature vegetation dryness index |
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