Abstract: The status of vegetation coverage was analyzed using the MODIS NDVI remote sensing data of the Chengdu-Chongqing Economic Circle from 2000 to 2018. Combined with the climatic indices (temperature and precipitation) from the meteorological stations in the study area, the spatiotemporal variations of NDVI and the influence of climate on NDVI were analyzed. The results showed that the NDVI of vegetation in the Chengdu-Chongqing Economic Circle presented a significant enhancement from 2000 to 2018, with substantial spatial variations. The areas with vegetation degradation were mainly concentrated in the northwest and southeast of the Chengdu-Chongqing Economic Circle, and areas with improvement were mainly distributed in the south and east. The annual NDVI was negatively correlated with mean annual temperature and positively correlated with precipitation. The impact of human activities on vegetation coverage cannot be ignored. Human activities improved vegetation, and areas with improved vegetation accounted for 95.33% of the total area. However, 61.66% of the region would have a trend of vegetation degeneration from improvement in the future.

Key words: Chengdu-Chongqing Economic Circle, NDVI, dynamic change, climate factor, human activity.