The effect of changes in land use and reducing urban green space on surface temperatures and the urban heat island of Tehran (Case study: Region 1)
Subject Areas :سحر منصوری 1 , شهريار خالدي 2 , رضا برنا 3 , فریده اسدیان 4
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Abstract :
This study was conducted to investigate the microclimate role of extruded builders in the last decade on surface temperature rise and heat island resonance and air pollution in the Tehran area. Shemiranat station data and Aqdasia air pollution measurement data over a 12 year statistical period were used. Landsat 8 satellite images were used to reveal the role of vegetation reduction on surface temperature. The results showed that in area 1 due to non-regular and unconditional construction in recent decades, the vegetation and trees of the area were not cut or standard green space development was not followed. Two hot areas, or islands of high surface temperature heat, are forming and developing over other adjacent parts. The eastern half of Region 1, especially its southeastern part, boasts a very hot part in all seasons. In hot seasons, surface temperatures in the area can reach as high as 50 degrees Celsius. The middle section is still better off if it still manages to maintain its green space. However, due to the steady growth of builders in the last decade, the minimum (morning) temperatures, especially in cold seasons, are rising rapidly and steeply. The amounts of fine-grained particles, especially PM10 and PM2, are increasing in region 1.The intensification of the heat island has caused south-west to south-southeast winds to intensify all months of the year. And it has made the area particularly polluted in the colder months of the year. The purpose of this study was to investigate the role of changes in land use and deforestation and loss of vegetation in changes in surface temperature and heat island of Tehran metropolitan area.
