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北疆不同草地类型MODIS植被指数的时空变化研究
引用本文:李霞,崔霞,黄晓东,梁天刚.北疆不同草地类型MODIS植被指数的时空变化研究[J].草业科学,2007,24(9):5-11.
作者姓名:李霞  崔霞  黄晓东  梁天刚
作者单位:兰州大学草地农业科技学院,农业部草地农业生态系统学重点实验室,甘肃,兰州,730020
摘    要:利用卫星遥感数据TERRA/MODIS,以2004、2005年5-10月的月度变化为例,分析了北疆试验区高寒草甸、高寒草原、温性草原化荒漠、人工草地和沼泽5种草地类型植被指数(MODIS-EVI、NDVI)在各个生长阶段的变化,从而反映5种草地类型生长状况及其特性.研究结果表明,5种草地类型增强型植被指数(EVI)均比归一化植被指数(NDVI)小,两者月度变化趋势基本一致,但EVI变化幅度比NDVI小.在高寒草原、高寒草甸、温性草原化荒漠草地类型上EVI比NDVI更稳定,但在沼泽多水的自然环境和人工草地上,EVI波动幅度大于NDVI.

关 键 词:北疆地区
文章编号:1001-0629(2007)09-0005-06
收稿时间:2006-07-28
修稿时间:2006-07-28

Spatial and Temporal Change of MODIS vegetation indices for different grassland in northern Xingjiang
LI Xia,CUI Xia,HUANG Xiao-Dong,LIANG Tian-Gang.Spatial and Temporal Change of MODIS vegetation indices for different grassland in northern Xingjiang[J].Pratacultural Science,2007,24(9):5-11.
Authors:LI Xia  CUI Xia  HUANG Xiao-Dong  LIANG Tian-Gang
Institution:College of Pastoral Agriculture Science and Technology, Lanzhou University, Key Laboratory of Grassland Agro-ecology System, Ministry of Agriculture, Lanzhou 730020,China
Abstract:Taking monthly change from May to October in 2004 and 2005 as an example,the NDVI(Normalized Difference Vegetation Index) and EVI(Enhanced Vegetation Index) for five typical grasslands of alpine steppe,alpine meadow,temperate desert steppe,artificial grassland and swamp were analyzed in different growth stages by use of new remote sensing data of MODIS(Moderate Resolution Imaging Spectroradiometer),which reflected its growth status and characteristics.The results indicated that the EVI values were lower than the NDVI values,and there existed a similar monthly change trend,but the magnitude of EVI was lower than the NDVI.EVI was steadier than NDVI in alpine steppe,alpine meadow and temperature desert steppe,but the stabilization of NDVI was better than EVI in artificial grassland and swamp.
Keywords:MODIS  EVI  NDVI
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