Porównanie wybranych elementów meteorologicznych w Bydgoszczy i jej okolicy

The aim of the study was a comparison of selected meteorological elements, measured with automatic weather stations in two localizations: centre of an urban area (Bydgoszcz) and in an open surroundings (Mochełek). The distance between the both places was about 20 km in a line. Results of the investigation confi rmed the presence of a heat urban island in Bydgoszcz. The urban area was distinguished by higher (of 1.3°C) air temperature higher saturation defi cit (1.1 hPa), whereas lower mean monthly relative humidity (8.3%), wind speed (2.5 m·s–2), monthly total precipitation (7.8 mm) and global solar radiation (32%), comparing to the rural location. The distinctions were not equal in particular monthly periods and in particular cases of meteorological elements. Global solar radiation, air temperature, relative humidity and wind speed differ most in the winter time while saturation defi cit and precipitation vary in summer.