The influence of solar radiation exposure on air temperature difference in a parking lot: a case study in Florence, Italy.

The aim of this study is to investigate how different solar radiation exposures might affect air temperature distribution during the day. This study was carried out on a parking lot in a high-density built-up area of Florence (Italy) during Summer 2007 and 2008. Two natural-ventilated air temperature sensors with radiation shields were placed in a sunlit area and in a shaded one. The relationship between the differences in data collected by the two sensors and solar radiation conditions were analyzed. Different hourly temperature values between the two areas during the hottest hours of the day were found both on cloudy and sunny days.