The analysis of impact of urbanization on the bioclimatic conditions in the scale of Ankara

Abstract

In this study the biclimatological conditions of Ankara urban area have been analyzed from the data which has been acquired from areas having different land cover and use. The hourly thermal perceptions of six meteorology stations have been calculated by using the physiologically equivalent temperature (PET) index that could involve not only the meteorological parameters but also human energy balance in calculations. The spatial distribution of values has been carried out by the multiple linear regression models. At the end of the analyses it is concluded that the areas which have higher built density in urban have greater PET values than the other land use classes during the most of the day. These daily mean PET difference between these areas and the grasslands is 0.4°C -1.2°C, the parks is 2.2°C-3°C, suburban is 1.4°C -2.2°C, rural is 1.7°C -2.5°C. The differences increase during night and from May to September, and decrease during daytime and from October to April.

Keywords: Thermal perception, bioclimatic conditions, land use, physiologically equivalent temperature, Ankara.