The paper presents results of air temperature measurements carried out in 2012 using automatic weather stations in three locations. The first station records thermal conditions in the center of Bydgoszcz, the second is installed in the periphery area of the city - in Fordon, and the third station represents the rural area surrounding Bydgoszcz works in the Research Station of the Faculty of Agriculture and Biotechnology, UTP in Mochle. Based on the comparison of temperature records it was found that the highest temperature was registered in the city center, slightly cooler was in the periphery area, and the coldest was outside the city in the rural area. The largest differences were recorded in the summer, and the lowest in the winter. Identified differences in air temperature between the center of the city, peripheral zone and rural area, affected the dates of the beginning, the end and the length of meteorological seasons, the thermal vegetation period and also the attendance of days in terms of thermal conditions. The biggest discrepancies related to the city center and rural area. In Fordon usually were recorded dates in between and intermediate values. In all the locations were found similar number of warm days, ...
The paper compares thermal conditions of air in July 2014 generating heat stress in the areas with different surface coverage - highly urbanized (center of Bydgoszcz), poorly urbanized (peripheral Fordon district) and used for agriculture (Mochełek). Hourly records of air temperature and humidity, wind speed and total solar radiation meteorological from three automatic weather stations were used for the analysis. We compared the averages and extremes of air temperature and perceptible temperature (temperature of effective radiation TRE). The obtained results showed that in the high building downtown occurred an effect of urban heat island. Air temperature and perceived temperature (TRE) in the center of Bydgoszcz were markedly higher compared to less built-up area and especially in comparison to the rural area. The number of days with heat sensation in Bydgoszcz was twice higher as in the comparable areas: peripheral and rural. ...
The study aimed to determine the differences in lawn irriga-tion needs resulting from the topographical heterogeneity of the city of Bydgoszcz and surrounding areas. To gather the data, me-teorological measurements were carried out in the period from May to September 2012-2014, in areas diversified in terms of the degree of urbanization and land cover: the center of a large city, urban peripheries and rural area. Based on the calculated water needs of the lawn, the range of rainfall deficits during the lawn growing period was determined. It was found that seasonal rain-fall totals in the compared locations were at a similar level, but a large temporal variability of this indicator was observed in indi-vidual seasons. In terms of evapotranspiration, clear differences were noted between the analysed locations. On average, the high-est amounts of potential evapotranspiration were found in the city center, which may be the result of the urban heat island phenome-non forming over this area. However, the lowest water loss due to evapotranspiration took place in the rural area. As a result of these, the analysis showed that the lawn's irrigation needs were characterized by both temporal and spatial variability. By far the greatest irrigation needs occurred in urban ...
