Geographia Polonica (2000) vol. 73, iss. 2, pp. 125-129 | Full text
The work seeks to reconstruct the frequency of occurrence of masses of ma-ritime air over the area of central Poland in the period between the 18th and 20th centuries. The input material was linked up with mean monthly air temperatures in Berlin (1702-1778) and Warsaw (1779-1998). Changes in the frequency of occurrence of the aforementioned air masses in the course of the year have been treated as a rough measure of variability to the atmospheric circulation over the area in question (advections from the west). It proved possible to identify 7 periods characterised by changes towards increases (H) or decreases (L), or else by oscillations around the mean (M) frequency of occurrence of masses of maritime air over Poland: I. (... 1702-1725 (?); L), II. (1726(?) -1761; H), III. (1762-1796; M), IV. (1797-1899; L), V. (1900-1928; H), VI. (1929-1950; L) and VII. (1951-1998..., H).
Andrzej A. Marsz, Department of Meteorology and Nautical Oceanography, Faculty of Navigation, Gdynia Maritime Academy Aleja Zjednoczenia 3, 81-345 Gdynia, Poland
Anna Styszyńska, Department of Meteorology and Nautical Oceanography, Faculty of Navigation, Gdynia Maritime Academy Aleja Zjednoczenia 3, 81-345 Gdynia, Poland