Wstępne badania nad zmianami warunków termicznych w krajobrazach podmiejskim i rolniczym
The study includes the analysis of hourly results of automatic measurements of air temperature measured at the level of 200 cm above the ground according to the real state time within the period from 1 December 2008 to 30 November 2009. The measurements were carried out at the agrometeorological station in Lipki near Stargard Szczeciński (agricultural area) and at the agrometeorological station in Ostoja situated on Gumieniecka Plain (suburban area of Szczecin). To determine the stimulating character of thermal conditions, the frequency of temperature changes from hour to hour and from day to day were calculated using 4 intervals of temperature: <2oC – changes indifferent to the organism, 2.1–4.0oC – sensible, 4.1–6.0oC – considerable and >6oC – sharp changes, and in the case of air temperature amplitude – 3 intervals – from 0 to 8.0oC – slightly sensible stimuli, from 8.1oC to 12.0oC - strongly sensible stimuli and >12.0oC – sharp stimuli. In both of the analysed areas, suburban and agricultural, the largest frequency of changes, from day to day as well as from hour to hour, occurred in the temperature interval 0–2oC. Large changes of air temperature >6oC, sharply affecting the organism of a human being, occurred mainly from day to day, most frequently in January, with a slightly larger percentage contribution of such days in the suburban area. The temperature changes from hour to hour were most frequently observed during a year in the morning between 8 am and 9 am and in the afternoon and in the evening between 4 pm and 9 pm. The largest number of strongly stimulating days (amplitudes above 12oC) were recorded in the suburban area in summer and in the agricultural area in spring. The obtained results show that the characteristic feature of the suburban area was larger thermal contrast, expressed by the frequency of interdaily and interhourly changes, as compared to the agricultural area.
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