地理科学进展 ›› 2007, Vol. 26 ›› Issue (1): 26-32.doi: 10.11820/dlkxjz.2007.01.003

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基于EOS/MODIS 数据的NDVI 与 EVI 比较研究

李红军1, 郑力1, 雷玉平1, 李春强2, 周戡3   

  1. 1. 中国科学院遗传与发育生物学研究所农业资源研究中心, 石家庄050021|
    2. 河北省气象科学研究所, 石家庄050021|
    3. 国家林业局, 北京100714
  • 收稿日期:2006-10-01 修回日期:2007-01-01 出版日期:2007-02-20 发布日期:2007-02-20
  • 作者简介:李红军(1973-), 男, 山西曲沃人, 助理研究员, 博士生, 主要从事3S 技术与生态水文研究。 Email:lhj@sjziam.ac.cn
  • 基金资助:

    中科院知识创新工程重要方向项目(KSCXZ-YW-N-037和KZCX3-SW-446);河北省节水农业重点实验室开放基金项目(0508021-HBKLA-01) .

Comparison of NDVI and EVI based on EOS/MODIS data

LI Hongjun1, ZHENG Li1, LEI Yuping1, LI Chunqiang2, ZHOU Kan3   

  1. 1. Center for Agricultural Resources Institute of Genetics and Development Biology, Chinese Academy of Sciences, Shijiazhuang 050021, China|
    2. Meteorological Institute of Hebei Province, Shijiazhuang 050021, China|
    3. State Forestry Administration, Beijing, 100714,China
  • Received:2006-10-01 Revised:2007-01-01 Online:2007-02-20 Published:2007-02-20

摘要:

作为NOAA/AVHRR 归一化植被指数(NDVI) 的延续和发展, EOS/MODIS 归一化植被指 数(NDVI) 和增强植被指数( EVI) 在许多领域得到广泛应用。应用数理统计和地统计学方法对二 者进行的对比研究表明: NDVI 在植被生长旺盛期容易达到饱和, 而EVI 则能克服这一现象, 比 较真实地反映植被的生长变化过程; 相同空间分辨率下, EVI 取值范围、标准差与变异系数均高 于NDVI, NDVI 数据比较均一, 其空间相关性高于EVI, EVI 更能反映研究区域内植被空间差异。 关键词:MODIS; 归一化植被指数(NDVI) ; 增强植被指数( EVI) ; 对比

关键词: MODIS, 对比, 归一化植被指数(NDVI), 增强植被指数(EVI)

Abstract:

As the continuation and development of NOAA/AVHRR NDVI, the normalized difference vegetation index (NDVI) and enhanced vegetation index (EVI) of MODIS have been comprehensively used in many fields. In order to investigate the difference between NDVI and EVI derived from MODIS, comparative study of these two vegetation indices was conducted by statistics and geo- statistic methods (semi- variance function). By the comparison of the two kinds of vegetation index distribution maps in different period, it is demonstrated that EVI improve the sensitivity for well- vegetated areas where NDVI is saturated when plants grow well, which will be helpful in monitoring plants growth status. At same resolution, i.e. 250m, 500m and 1000m, by means of the geo- statistics, the results show that range, variance and variation coefficient of EVI is higher than that of NDVI, the value of NDVI is even, and its spatial relativity is higher than that of EVI, which all show that EVI is more sensitive to the spatial heterogeneity of plants in research area.

Key words: comparison, enhanced vegetation index (EVI), MODIS, normalized difference vegetation index (NDVI)

中图分类号: 

  • TP751