Badania Fizjograficzne, Seria A, Tom 62, 2011
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Browsing Badania Fizjograficzne, Seria A, Tom 62, 2011 by Author "Szyga-Pluta, Katarzyna"
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Item Wielkość ochładzająca powietrza - na Wybrzeżu Klifowym w rejonie Białej Góry - w sezonach letnich 2008-2009 (Woliński Park Narodowy)(Wydawnictwo Poznańskiego Towarzystwa Przyjaciół Nauk, 2011) Szyga-Pluta, KatarzynaThe study includes an analysis of daily distribution of air cooling values in the selected locations of Wolin National Park. The measurements were taken in the summer seasons of 2008 and 2009. The index has been determined with regard to local qualities of the environment. It has been established that the described bioclimatic index possesses a varied daily distribution which depends on relief and vegetal coverage of the terrain. According to the scale of Conrad, the most favourable bioclimatic conditions occurred at location 1 (Beach). The daily distribution of air cooling values reflects thermal conditions and dampness. The most balanced distribution of air cooling values occurred at location 3 (Buczyna), which results from the smallest variation of temperature and dampness at this point as well as it being shielded from the wind.Item Zmienność termicznych pór roku w Poznaniu(Wydawnictwo Poznańskiego Towarzystwa Przyjaciół Nauk, 2011) Szyga-Pluta, KatarzynaOn the basis of period 1921–2008 series of monthly values of air temperature in Poznań the eight thermal seasons were characterized. The duration of thermal season was determined in relation to the day, when the air temperature crossed the following thermal thresholds: 0, 5, 10 and 15°C. Considering the values of the mean air temperature there were defined the following thermal seasons: early spring (0,0–4,9°C), spring (5,0–9,9°C), early summer (10,0–14,9°C), summer (above 15,0°C), early autumn (10,0–14,9°C), autumn (5,0–9,9°C), early winter (0,0–4,9°C) and winter (below 0,0°C). Gumiński method was applied to estimate the first and the last days and the duration of thermal periods mentioned above. It has been stated that in the analyzed period the highest range of the beginning was characteristic for early spring (Tab. 1). The lowest range characterizes the thermal autumn. Thermal summer is the longest and spring is the shortest season of the year in Poznań (Tab. 2). Thermal seasons in the warm period (the increase of temperature) began earlier in the examined period, while thermal seasons in the cold period (the decrease of temperature) tend to begin later (Fig. 1A–8A). Early spring and winter show the biggest variability of the beginning dates, while thermal autumn – the lowest one. The dates of the beginning and end of the intensive vegetation periods: early and late summer are the most stable. The greatest changeability of the length characterizes thermal winter and the lowest – late summer. Early spring tend to be shorter in the analyzed period in Poznań (Fig. 1B-8B). Longer are getting spring, summer, autumn and early winter. There were 7 years without thermal winter observed in Poznań (tab. 3), which occurred in the last twenty years of the examined period.