Results/Conclusions  

In this study, we expect to reach the preliminary results of understanding the primary characteristics of urban phenology, and the detailed relationship between urban phenology and the climatic factors. The preliminary study results show that the phenological events of understory take place a little earlier than those of trees in spring. Two dominant individual species, white ash and basswood, represent the noticeable difference on the changes of phenological events in fall. White ash showed a gradual variation in both leaves colored and leaves fallen, while basswood shows a slow, rapid, and then slow change in these two phenological events. Therefore, the whole community mainly composed by these two dominant tree species showed an integrative trend, growing relatively quickly and then slowly. To some extent, we can assume that photoperiod may be the crucial factor influencing the leaves coloring and falling of white ash. On the contrast, the fall phenophases of basswood may be significantly influenced by temperature. The Landsat NDVI values corresponded well to the phenological change of vegetation on the ground in fall. However, it is probably raised by the questionable remote sensing data that the Landsat NDVI values did not match the change of plant phenology in spring. For the fall observation, there is no obvious spatial correlation between the NDVI values and the phenological events in the study area.