基于NOAA时间序列数据分析的中国西部荒漠化监测  

Application of NOAA-AVHRR to Desertification Monitoring for Western China

作　　者：刘爱霞[1] 王长耀[1] 刘正军[2] 牛铮[1] 

机构地区：[1]中国科学院遥感应用研究所,北京市大屯路9718信箱100101 [2]中国测绘科学研究院摄影测量与遥感所,北京市北太平路16号100039

出　　处：《武汉大学学报（信息科学版）》2004年第10期924-927,共4页Geomatics and Information Science of Wuhan University

基　　金：国家科技攻关计划资助项目(2001DFBA0005);中国科学院知识创新工程重大资助项目(KZCX1SW0102);国家863计划资助项目(2003AA131020;2003AA131170)。

摘　　要：利用1982～2000年的NOAAAVHRR10日合成时间序列数据,对中国西部干旱半干旱区的沙漠边缘及荒漠化多年动态变化进行了分析。The primary purpose of this study is to estimate the boundary between vegetated and non-vegetated areas and to assess the condition of desertification in western China located in arid and semiarid regions. Vegetation is very sparse in desert and therefore onset of green-up in the desert was undetectable with AVHRR NDVI data. The occurrence of onset of green-up, as determined with time series NDVI data, is used to identify desert and non-desert areas. The coefficient of variation (CoV) of the monthly NDVI (maximum-value composite) is used as a parameter to characterize the changes of vegetation in this work.

关 键 词：干旱半干旱区 AVHRR NDVI 变异系数 荒漠化监测 

分 类 号：P237.3[天文地球—摄影测量与遥感]