Acidic and alkaline precipitation components in the mesoscale range under the aspect of meteorological factors and the emissions

At two sites in the north of the G.D.R. 80–100 km distant from industry rain from individual precipitation events was collected by automatic samplers and relevant ionic species were analyzed. The sampler is described.The cloud routes at the 850 hPa level were traced back 1 day and then seven sectors were formed for each collection site taking into consideration geographical aspects and features of the emission pattern for the rea concerned.Investigating the precipitation components as a function of the emission pattern knowledge of meteorological input parameters are required. The influence of these parameters is reported.Contrary to the combustion of other fossil fuels, in the case of brown coal combustion a considerable emission of neutralizing components (especially CaO) occurs, counteracting the formation of “acid rain”. This effect is clearly proven by means of individual examples and average considerations, i.e. the formation of acid rain does not only depend on the SO₂ and NO_x emissions.The wet deposition of all types of ions at the measuring site for every emission sector was calculated by means of precipitation statistics. Using these investigations reference points with regard to border crossing transport are given.