The changes of anthropogenic loadings from two Russian large industrial regions (Norilsk and Ural) to the environment of Siberia, induced by variations in atmospheric circulation at the begining of 2000s were studied. The 5-day trajectories of air mass transport for every day of January, April, July, and October during 1981-2007 were analyzed. The HYSPLIT-4 model with NOAA (NCEP/NCAR Reanalysis Data Files) reanalysis database was applied. The seasonal and long-term variations in the average concentrations of anthropogenic heavy metals (Pb, Ni, Cu) from those sources in nearsurface air and the average fluxes of pollutants onto the surface were estimated for the different sites of Siberia. The differences between 2000s and 1990s are characterized by various mosaic spatial patterns at different seasons. The effect from the changes of atmospheric circulation is of the same order (but may be of different sign) of source emission decreasing during those decades. Annual depositions of heavy metals (only from two sources) onto the catchment area of every large Siberian river (Ob, Yenisei, Lena) are comparable with the flows of these metals in river runs-off.
atmosphere; pollution; hard metals; far transfer