【摘要】 为了分析东北地表植被覆盖动态变化及其变化机理,选取该地区1998-2007年的SPOT/NDVI时间序列数据进行研究,并利用时间序列谐波分析(HANTS)算法对旬合成的NDVI数据进一步去云处理,根据处理后的结果,用一元线性回归趋势法定量描述了东北地表植被覆盖的动态变化。结果表明:近10年来中国东北地表植被覆盖整体得到改善的区域远比植被覆盖退化的区域面积大,其中严重退化的区域主要是内蒙古的东四盟地区,尤其是呼伦贝尔和科尔沁地区。更多还原

【Abstract】 SPOT/NDVI time series data between 1998-2007 were selected to analyze the vegetation cover change in Northeast China and its mechanism. To furtherly remove the cloud contaminated images,the HANTS algorithm was used,and then the slope of one variable linear regression was used to indicate the dynamic variation of surface vegetation cover. The results showed that the greening area was larger than the degraded area in Northeast China during recent 10 years,and the degraded severely areas mainly included the Hulun Buir,Xing ’an League,Tongliao city,Akane of inner Mongolia,especially Hulun Buir and Horqin.更多还原