Quantitative and Qualitative Changes of Precipitation Input to the Ojców National Park (South Poland) during 1997–1999

English. Changes of the qualitative and quantitative features of snow and rain during the winter and the vegetation period, respectively, were studied during three years (1997–1999). The sites were located on Chełmova Góra Mt. in the Ojców National Park (South Poland), which is one of the most polluted areas in Poland. Standard methods of measuring bulk precipitation were used according to the ICP Forest Manual. One plot was near the summit part (OPN2), and the other plot was in the lower part close to the foot (OPN5) of the Chełmowa Góra Mt. The total amount of Ca decreased during the study period, while NO3 − and SO4 −2 decreased only in the vegetation period. During the winter period the snow carried high amounts of Cl−, NO3 −, SO4 −2, Na, Mg, and Ca. A decrease in pH was noticed during the winter periods, whereas an increase in pH was found during the vegetation period. Higher element concentrations were always found in the upper plot compared to the lower situated plot. This indicated that the upper and more exposed parts of the mountains in the Park were under higher pollution stress.

English. bulk, snow, precipitation, main anions and cations, Ojców National Park, Poland

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