Main Article Content
The article presents results of a study conducted between 1985- 1996 concerning the deposition of sulphur dioxide, nitrogen oxides, fluorine compounds and dust in the forest in the Wolinski National Park (WNP) area. Applying standards established by the Forestry Research Institute, Warsaw, potential hazards from particular pollutants were evaluated as medium, high and in some instances - extremely high. Statistical analysis of relationships of monthly depositions of SO2, NOx, H2F2 and dust fall-out and certain climatological parameters (air temperature, wind speed and direction, amount of precipitation, air humidity), carried out also by statistical methods, indicated that NOx and dust deposition represented ecological hazards to the tree stand of WNP. Extremely high deposition values of both parameters were observed with air masses from the south. This observation coincides with the extended technical modernisation of the chemical plant „Police” (situated close to Szczecin), including the change of raw material in the WNP production of phosphoric acid. The study confirmed the fact that the greatest threat to WNP forest comes from the nearby pollution sources, mainly NOx and dust emitters, especially the heating and power plant of the Szczecin agglomeration and the power plant „Dolna Odra”, near Gryfino.