Abstract
This paper is intended to be used by specialists engaged in air and precipitation quality management on regional and continental scales. Major goals are to establish definition, methodology and specific values of background air and precipitation quality for sulfur (S) and nitrogen (N) species to be used in practical applications of air resources management. Major findings are the following: 1. (a) 69% of SO 2 and 63 % of NO 2 concentration over Europe originate from continental scale anthropogenic sources, 2. (b) 15% of precipitation sulfate and 11% of precipitation nitrate over Europe are contributed by hemispheric background, 3. (c) hemispheric background pollution values for Europe were found as 1.25 μg (SO 2-S)m −3, 0.80 μg (SO 4 2−-S)m −3, 0.157 mg ( SO 4 2−- S) l −1 and 0.04 mg ( NO 3 −- N)ℓ −1.
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