An analysis on the coupling relationship between urban vegetation and land surface temperature in Hangzhou based on ASTER imagery

The coupling relationship between urban vegetation and land surface temperature (LST) has been of great interest to a variety of environmental studies. This paper retrieves the urban vegetation and LST utilizing Terra ASTER imagery in the year 2007, and analyzes their coupling relationships accordingly, so as to provide the basis for decision making of ecological planning and environment protection. It turns out that NDVI, urban vegetation abundance (UVA) and urban forest abundance (UFA) are all in negative correlation with land surface temperature (LST), so that Urban vegetation and urban forest are both capable in decreasing LST. The influence of urban vegetation and urban forest varies with pixel aggregation, and peaks around 90 m ~ 120 m resolution. At the end of this paper, some future efforts on the analysis are pointed out.