Urban vegetation phenology analysis and the response to the temperature change

Constructing the high spatio-temporal NDVI time series data is necessary to study the urban vegetation phenology, and the response relationship between vegetation phenology and temperature changes can better understand the urban ecological conditions. In this paper, taking the typical area in Nanjing City as study area, urban vegetation phenology is deriving from HJ NDVI time series. Two ways of the “season” and “season+ trend” are used to extract the vegetation phenology and the relationship of temperature change and the way of “season + trend” is analyzed. The results showed that HJ NDVI time series can be used to research on urban vegetation phenology. Two ways of the “season” and “season+ trend” are similar in the phenology derivation if there is no break; otherwise, they are quite different if the breakpoints exist. And there is an obvious lag of vegetation phenology caused by temperature.