Klimat, topoklimat i bioklimat Pogórza Wielickiego w świetle badań na stacji naukowej IGiGP UJ w Gaiku-Brzezowej

Climate, topoclimate and bioclimate of the Wieliczka Foothills according to the data from the research station of the Institute of Geography sand Spatial Management, Jagiellonian University In Gaik-Brzezowa

Summary: Wieliczka Foothills is a mesoregion of the area 530 km2, between the valleys of the Skawa and the Raba river, reaching 350-500 m a.s.l. It is a densely populated region, of agricultural character (Kondracki 1988). The Field Station of the Institute of Geography and Spatial Management, Jagiellonian University, in Gaik-Brzezowa near Dobczyce (?=49°52'N, ?=20°04'E, h=302 m a.s.l.) is located at present on the top of a flattened ridge, in the vicinity of the Dobczyce Water Reservoir. It is a measurement point representative for the Wieliczka Foothills, as the influence of the relatively small reservoir is limited to the nearby, steep slopes (Obrębska-Starklowa 1995). The station was founded in 1963. The construction of the reservoir in the 1970s and 1980s forced shifting the station from the Raba river valley to the nearby hill top. The homogeneity of the measurement series was broken and the local climate of the are was changed. The main station "Kopiec" (Hill top) has operated as such since 1983, and the measurements taken after January 1988 (complete filling of the reservoir with water) may be considered homogenous. Mean annual air temperature in the years 1988-2003 amounted 8.7°C. Mean annual sum of precipitation in the years 1971-2000 reached 767 mm (Twardosz 2003). The number of days with thunderstorm in the vegetation period in the years 1988-2003 was on average 26.1. Mean annual cloudiness in the period 1991-2000 was 71% (Matuszko 2005b). The lowest annual sunshine duration in the period 1971-1997 occurred in 1980: 1222.2 hours (25-27% of the potential sunshine duration), and the highest in 1982: 1708.9 hours (Olecki 2002). After the construction of the reservoir the differences between mean annual air temperature at various points in the Raba valley diminished, as the reservoir of cold air at its bottom was eliminated and the local circulation was changed. The sequence of topoclimates, from the warmest to the coldest was also changed (Obrębska-Starkel et al. 2001). Diurnal air temperature range decreased but still in winter the biotopoclimate is moderately stimulating, and in summer moderately sparing. The diversity of research realized at the station is to a large extent the contribution of Professor Barbara Obrębska-Starkel, who first initiated it together with other researchers from the Dep. of Climatology, Jagiellonian Univ., and then developed it, for example as the head of interdisciplinary research projects on topoclimate.

Trepińska J., Olecki Z. (red.), 2006, Klimatyczne aspekty środowiska geograficznego, IGiGP UJ, Kraków, s. 173-181.

Instytut Geografii i Gospodarki Przestrzennej UJ

ISBN 83-88424-16-5

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