monthly and annual air temperature in the region of Bydgoszcz in the years 1951-2010, based on measurements from a representative meteorological station located within the Airport Bydgoszcz-Szwederowo. Air temperature measurements were carried out on the plateau, about 3.5 km from the city center. This paper presents a range of changes of the average air temperature, on the basis of selected, calculated elements of descriptive statistics. Regression analysis was performed and the linear function determined direction of studied parameters at a time. In addition, the thermal conditions prevailing in Bydgoszcz were classified based on the method proposed by Lorenc[1994]. The average air temperature in the region of Bydgoszcz, especially in the winter months, was characterized by high temporal variability, appropriate to moderate and transitional climate in Poland. Average annual air temperature was characterized by a statistically significant increase over time, at 0.17 °C per 10 years. There has been a temporary extension of the variability of average air temperature in the thirty-year 1981-2010 in 9 out of 13 examined cases, compared to the previous period 1951-1980. Months classified as normal thermal periods accounted for 40.8% of all analyzed monthly basis, throughout the study period 1951-2010. ...
The purpose of the research was to characterize the variability of relative air humidity in the growing season in the vicinity of Bydgoszcz in the years 1985-2010. The study was based on measurements taken from a representative meteorological station located within the Airport Bydgoszcz-Szwederowo. Standardized air humidity measurements were carried out in a thermometer shelter, by Assmann psychrometer at the height of 2 m above the ground, on the plateau, about 3.5 km from the city center. The study investigated the nature and scope of changes in mean relative humidity by calculating selected elements of descriptive statistics. Based on the linear function of Regression analysis we determined direction of changes and specified the ratio with time of analyzed indicator. The average relative air humidity in the Bydgoszcz vicinity, especially in the spring and summer months, was characterized by a large temporal variability, appropriate to moderate and transitional climate in Poland. The variability of the analyzed indicator in multi-year period 1985-2010 was not statistically confirmed. It was found a temporary widening of variation in 5 of the 7 examined cases in period 1998-2010 compared to the previous period 1985-1997. ...
