Abstract

Urbanization has led to a reduction in green spaces and thus transformed the spatial pattern of urban land use. An increase in air temperature directly affects forest vegetation, phenology, and biodiversity in urban areas. Today, one of major problem in urban areas are increasing of surface temperature and its unbalanced distribution due to changes in nature surfaces that on effects green space reduced and has been replaced with impervious surfaces and non-transferable, including stone, asphalt, cement and etc. The distribution of temperature in urban areas and its relation to urban land uses such as green space can be considered one of the studies in urban climatology. In this paper, based on satellite imagery urban green space pattern and urban heat distribution (UHD) has been assessment in Tehran city. In this study, Aster images due to good resolution for land use mapping and Landsat 8 thermal images have been used for urban heat distribution. For analyzing results regression and other GIS methods has been applied in this paper. The results show that central parts of Tehran city due to lack of green spaces, high levels of urban traffic congestion and urban contexts has higher temperatures in comparing with northern part that had a moderate green space and low urban density. Keywords: Urban Green Space, Urban Heat, Distribution, Thermal, Tehran