A STUDY ON THE POTENTIAL SOURCES OF AIR-POLLUTANTS - OBSERVED AT TJORN, SWEDEN

The Potential Source Contribution Function (PSCF) receptor model combi nes both chemical and meteorological information. In this study, PSCF was employed to identify the potential source emission regions for aer osol compositions measured at Tjorn, Sweden (58.01 degrees N, 11.36 de grees E). PSCF was for the first time applied on a European scale. One hundred and fifty-two four-day air parcel backward trajectories were combined with concentrations of sixteen elements determined in 33 coar se and fine aerosol samples. The observations were made between Februa ry 17 and March 26, 1985. The modeling results of the heavy metals V, Pb, Zn, and As are presented and compared with available emission inve ntory data. A number of known industrialized regions in the former USS R and Europe are found of high potential to be the emission source are as. These areas are in good agreement with the known emission informat ion. The PSCF maps of total sulfur, Non-Seasalt-Sulfur (N.S.S.) and ch lorine are also presented. High potential regions in the Arctic area e xist in the PSCF map for total sulfur wheres they do not occur in that for N.S.S.