中文摘要：

根据1998—2008年东北地区SPOT-VGT NDVI数据和气象数据,分析了11年来东北地区植被年均NDVI变化及其与气象因子的相关性,并对不同植被生长季NDVI变化及其与气象因子的相关性和滞后性进行了研究.结果表明：近11年来东北地区植被总体状况较好,绝大部分地区植被未发生明显变化;植被年均NDVI受温度、降水影响较为显著,且温度影响程度高于降水,降水影响程度北部地区高于南部;东北地区不同植被生长季NDVI值不同,植被生长状况变化不同,但变化幅度较小;植被生长季NDVI受同期温度和降水影响显著,在旬的尺度上表现更为明显,其中温度对植被影响更大;东北地区植被NDVI对温度的响应存在10～20d的滞后期,对降水的响应存在约20d的滞后期.

英文摘要：

Based on the SPOT-VGT NDVI and meteorological data during 1998--2008, the change of annual average vegetation NDVI and the relationship with climatic factors were studied. In addition, the various vegetation NDVI changes in growing season and the correlation and hysteretic nature with climatic factors were also studied in this paper. The results showed that, the general status of vegetation in Northeast China were well in the past 11 years, most of the vegetation did not change significantly. The annual average NDVI was affected by temperature and precipitation significantly, with temperature more significantly, and the influence degree of precipitation was higher in the northern region than southern. Different vegetation had different NDVI in growing season, and the growth status changes were different, but the changes were not obvious. NDVI in growing season was affected significantly by temperature and precipitation in the same period, with temperature more significantly, which was more evident in ten days scale. The response of NDVI in Northeast region to temperature had a time lag of about 10-20 days,while had a time lag of about 20 days for precipitation.