Cykliczne zmiany temperatury powietrza w Polsce

The dissertation takes up the problem of homogeneity of the air temperature field in Poland in terms of cyclical fluctuations. The thermal conditions within the area of Poland were described through the chronological series of the monthly a verages of air temperature, registered at 58 stations of the Institute of Meteorology and Water Economy in the years 1951-1990. The spatial differentiation was determined of the periods, amplitudes, and phases of the identified short-term fluctuations of air temperature, and the synchronicity of these fluctuations on the area of Poland was demonstrated. An objective of the study was constituted, as well, by the identification of the natural causes of the periodicity of air temperature changes - demonstration of the synchronicity (correlation) of the cycles of air temperature, atmospheric circulation, and solar activity. An attempt was also undertaken of determining the share of the short-term variability in the observed trends of air temperature in Poland. The significant cyclical components identified on the basis of the data from the years 1951-1990 were made use of in the forecast of air temperature in Poland for the decades to come.