Charakterystyka częstości występowania wysokich dobowych sum opadów w zależności od typu cyrkulacji atmosferycznej a obszarze północno-zachodniej Polski

The purpose of the study reported was to determine the dependence of the occurrence of high daily precipitation sums (≥10 mm) upon the atmospheric circulation types (as classified according to Osuchowska-Klein) within the area of the north-western Poland. The source data are constituted by the daily precipitation sums for the period 1961-1980, measured at 185 precipitation gauges. The shares of the high daily precipitation sums are more pronounced in the cyclonal, Ck, and the western, W, macro-types than in the anticyclonal, Ack, and the eastern, E, ones. The daily precipitation sums exceeding 30 mm occur for the advection of the air masses from the southern sector, both in the anticyclonal (E₁ and D₂C) and the cyclonal (B, F, D) types, as well as for the cyclonal north-western circulation CB. Then, the shares of daily precipitation sums exceeding 50 mm are most pronounced for the cyclonal macrotype, Ck (except for April and July), and for the eastern macrotype, E (except for November and December). The shares of such high daily precipitation sums are the biggest for the advection of the air masses with the northern component, E₀, E, CB.