| MODIS增强型植被指数EVI与NDVI初步比较 |
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| 引用本文： | 王正兴,刘闯,陈文波,林昕.MODIS增强型植被指数EVI与NDVI初步比较[J].武汉大学学报(信息科学版),2006,31(5):407-411. |
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| 作者姓名： | 王正兴 刘闯 陈文波 林昕 |
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| 作者单位： | 中国科学院地理科学与资源研究所,北京市朝阳区大屯路甲11号,100101 |
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| 基金项目： | 科技部科技基础条件平台建设计划;中国科学院知识创新工程项目 |
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| 摘 要： | 利用东亚地区典型地带性植被和MODIS数据，对广泛使用的植被指数NDVI和新开发的增强型植被指数EVI进行了对比分析。由MODIS开发的NDVI和EVI对干旱-半湿润环境下低覆盖植被的描述能力相似，但对湿润环境下高密度植被的描述有明显差别：NDVI年时间过程的季节性不明显，表现为全年高平的曲线；而EVI仍然有季节性，表现为钟形曲线，与月平均温度关系更密切。EVI的这一特征为研究高覆盖植被的季节性变化提供了新的思路。
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| 关 键 词： | 归一化植被指数 月均温 季节性 |
| 文章编号： | 1671-8860(2006)05-0407-04 |
| 修稿时间： | 2006年1月8日 |
Preliminary Comparison of MODIS-NDVI and MODIS-EVI in Eastern Asia |
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| WANG Zhengxing,LIU Chuang,CHEN Wenbo,LIN Xin.Preliminary Comparison of MODIS-NDVI and MODIS-EVI in Eastern Asia[J].Geomatics and Information Science of Wuhan University,2006,31(5):407-411. |
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| Authors: | WANG Zhengxing LIU Chuang CHEN Wenbo LIN Xin |
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| Abstract: | Typical vegetation in eastern Asia and MODIS data were used to characterize newly-developed Enhanced Vegetation Index(EVI) and widely-used NDVI.The study found that both NDVI and EVI were good indicators for vegetation in wide range from arid to semi-humid area,yet they differed in characterizing dense vegetation: NDVI temporal profile had no clear seasonality with a flat-high curve;and EVI has a clear seasonality with a bell-shaped curve,which has closer relationship to temperature than to NDVI.This may suggest a new opportunity for vegetation study in densely vegetated region. |
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| Keywords: | NDVI monthly averaged temperature seasonal |
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