中国农业气象

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基于MODIS与AVHRR数据的安徽省覆被变化比较

刘惠敏;黄勇;何彬方;   

  1. 安徽省气象科学研究所,安徽省气象科学研究所,安徽省气象科学研究所 合肥230031,合肥230031,合肥230031
  • 出版日期:2007-06-10 发布日期:2007-06-10
  • 基金资助:
    安徽省科研课题0306“MODIS在作物长势监测中的应用及与AVHRR的比较分析”;; 安徽省科研课题“EOS/MODIS淮河流域水资源动态监测研究”;; “遥感地物分类方法及其在安徽农业中的应用研究”;; “MODISLAI/FPAR在安徽省生态监测评估中应用”

Comparison of Vegetation Cover Change Based on AVHRR and MODIS Data in Anhui Province

LIU Hui-min,HUANG Yong,HE Bin-fang (Institute of Meteorological Science of Anhui,Province,Hefei 230031,China)   

  • Online:2007-06-10 Published:2007-06-10

摘要: 不同季节内绿度值的变化特征代表了地物的生物信息,不同卫星传感器所监测地表信息不可避免存在系统差异,本文以MODIS和AVHRR卫星资料为主要数据源,针对安徽省淮北平原、大别山区,进行MODIS NDVI与AVHRR NDVI数值对比及特点分析。结果表明:相同覆被类型对应的MODIS NDVI与AVHRR NDVI日值之间具有较好的相关性,而且在4km×4km分辨率下,研究区的NDVI相关性均比1km×1km分辨率下高;相同覆被类型特征点对应的MODIS NDVI与AVHRR NDVI月值在年内的变化过程基本一致;不同地表覆被NDVI波形差异明显:典型旱地、水田由于两种作物轮种其NDVI变化曲线为双峰型,山区、果林和城市的NDVI变化曲线为单峰型;不同植被覆被总体的绿度值情况是大别山和皖南两大山区最大,旱地、农田次之,城市最小。

关键词: MODIS, AVHRR, 植被指数

Abstract: Based on the MODIS and AVHRR data,the vegetation cover and its characteristics from different data sources in the North Huai River Plain and Dabieshan mountain areas of Anhui Province were compared.Results showed that the MODIS data was highly related to the AVHRR data under the same vegetation cover type.The relativity of NDVI data between with the MODIS and AVHRR was higher under the resolution of 4km×4km than that under the resolution of 1km×1km.The annual change of the monthly MODIS NDVI values was consistent with that of the AVHRR NDVI values,as the vegetation cover type was same,while it was different as the vegetation cover type was not same.In the typical dryland and paddy rice field,the NDVI curve was in a two apex form because of crop rotation,while in the mountain,fruit forest,and city and town areas,it showed a single apex form.The seriation of the total vegetation index among the areas according to its magnitude could be the Dabieshan and the South mountain areas of Anhui Province,dryland and farmland,and city and town areas.

Key words: MODIS/AVHRR, MODIS/AVHRR, Vegetations index