In this paper we present the results of simultaneous measurements of total
particulate sulfur and gaseous tropospheric SO2 in Belgrade troposphere dur
ing October 1999. Using the ESEM/SEM/EDX techniques we identified main part
iculate sulfur carriers in Belgrade troposphere. We found direct correlatio
n between gaseous SO2 and particulate sulfur concentrations, which is expla
ined by a synergy of anthropogenic activities and meteorological inversion
effects during the days with heavy weather.