Rozk ad Przestrzenny Temperatury i Wilgotno ci Wzgl dnej Powietrza na Wybranym Fragmencie Zlewni Ró anego Potoku

The paper contains the results of topoclimatic measurements (air temperature and humidity) carried out on 15th March 2008 in the Ró any Potok River catchments, at the altitudes of 5 and 150 cm above ground surface in 115 representative points. The measurement points were situated at various forms of relief and over different plant cover. The area of investigation is characterized by less differentiated relief, covered by pine forest, vast meadows with residential buildings. The synoptic conditions on 15th March 2008 were transformed by lows, which were moving over central Europe on 14th March 2008. This caused precipitation and growth of temperature and on 15th March growth of air pressure (1010 hPa), air temperature about 7°C and humidity between 60 and 70%. The measurements were taken with handheld humidity and temperature instruments VAISALA. The analysis of spatial differentiation shows that the variability of humidity and air temperature particularly depends on the specific location of the environmental components, anthropogenic elements and relations between them. University camp, residential district and routes contribute to air temperature growth and humidity fall at the altitudes of 5 and 150 cm above ground surface. Another significant factor is plant cover, especially forests, meadows and bushes. Thicker forest complexes are characterized by growth of humidity and temperature fall, whereas vast meadows with bushes are marked by significant increase of temperature. The factor, which essentially modifies temperature and humidity diversity is the speed of wind and its direction. It is a carrier of humidity from the western sector and brings about the fall of air temperature. The disturbance of air temperature and humidity in the forest was probably caused by the phenomenon of interception, particularly in the forest between Bronis awa and Dzi gielowa streets. On the basis of topoclimatic measurements, the most important factor, which modifies the air temperature and humidity is antropopression along with the components mentioned in "meteorological compromise" (Oko owicz 1969).