Zmienność wskaźników cyrkulacji atmosferycznej nad obszarem Lubelszczyzny i związek temperatury powietrza i opadów atmosferycznych z tymi wskaźnikami
Temporal variability of atmospheric circulation indices over the Lublin region and their relationships with air temperature and precipitation

Summary/Abstract: The objective of the study was the long-term and annual variability of atmospheric circulation indices over the Lublin region in the years 1951–2010. The zonal, meridional and cyclonicity indices were calculated based on the calendar of circulation types over East-Central Poland. Furthermore, the relationships between atmospheric circulation and thermal as well as precipitation conditions in the Lublin region were examined. In winter season, the strongest zonal circulation was noticed in the period from the second half of the 1980s to the end of the 20th century. In the last two decades of the analyzed period, a higher frequency of southern circulation in summer was observed. The characteristic features of atmospheric circulation in the study area include the prevalence of westerly circulation in autumn and winter, and easterly air flow in spring. The zonal circulation had an important role for monthly air temperature both in winter and in summer, whereas meridional air flow in spring and autumn. Compared to the air flow direction, the character of atmospheric circulation, expressed by anticyclonic and cyclonic circulation, had a weak influence on monthly air temperatures. The cyclonicity index most accurately reflects the variability of monthly precipitation totals in the Lublin region

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