吉林西部地表植被归一化植被指数的时空分布特征

Spatial Distribution Pattern of Normalized Difference Vegetation Index for Above-ground Vegetation in Western Jilin Province

基于GIMMS归一化植被指数(ND,V,I)数据集(1998—2008年)通过极值处理得到每15d的最大值,采用空间自相关分析和趋势分析方法,研究吉林西部地表植被分布的空间特征,结果表明:1998—2008年,吉林西部生长季的地表植被表现出明显的上升趋势;空间分析可知,研究区地表植被的空间分布表现出明显的正相关,但是局部地表植被分布有破碎倾向,空间分布的整体性一般。

The maximum Normalized Difference Vegetation Index（NDVI） dataset for every 15 days was worked out based on the Global Inventory Modelling and Mapping Studies（GIMMS） NDVI data sets for 1998-2008.The spatial distribution of NDVI for the above-ground vegetation in the western Jilin Province was studied by spatial autocorrelation analysis and trend analysis methods.Results showed that NDVI for the above-ground vegetation in the western Jilin Province exhibited a rising trend in the growing season during 1998-2008.Spatial autocorrelation analysis indicated a positive spatial autocorrelation in the whole study area,but the above-ground vegetation showed a fragmented distribution in some parts,which means the integrity of vegetation distribution in the western Jilin Province is at a moderate level.