Assessing the impact of land surface temperature on urban net primary productivity increment based on geographically weighted regression model.

Urbanization had a huge impact on the regional ecosystem net primary productivity (NPP). Although the urban heat island (UHI) caused by urbanization has been found to have a certain promoting effect on urban vegetation NPP, the factors on the impact still are not identified. In this study, the impact of urbanization on NPP was divided into direct impact (NPP) and indirect impact (NPP), taking Kunming city as a case study area.