【摘要】 利用新一代卫星遥感数据TERRA/MODIS,结合地面调查数据,以内蒙古自治区锡林郭勒盟草地为研究区域,分析草甸草原、典型草原、沙地草原、荒漠草原四种代表性草地植被指数(MODIS-NDVI)的时空变化特征,以2002年4～10月旬度变化为例,较详尽地反映草地在其生长期内各个阶段植被指数的变化,进而反映生长状况;以2002年9月的NDVI合成数据为例,对植被指数分级,分析各个级别NDVI值域在地理空间上的变化,反映各类草地在空间上的连续性和差异性。更多还原

【Abstract】 By combining with the investigation of grassland,making use of the new remote sensing data of MODIS(Moderate Resolution Imaging Spectroradiometer),taking Xilinguole grassland in Inner Mongolia as example region,the temporal and spatial changes of the NDVI of the four typical grassland:temperate meadow,temperate steppe,sand steppe and temperate desert steppe were analyzed.Taking ten-day change from April to October as sample can reflect the change of grassland NDVI during its growth time in more detail,which reflects its growth status;taking the composite data of NDVI of September in 2002 as example,the spatial changes of the value domain of all kinds of value were analyzed,which well reflects the continuity and difference of different types of grassland.更多还原