THE FLUX OF ANTHROPOGENIC TRACE-METALS INTO THE ARCTIC FROM THE MIDLATITUDES IN 1979 80/

The flux of trace metals into the Arctic atmosphere between 0 and 3.5 km altitude for the period July 1979-June 1980 was determined using a chemical transport modeling approach used previously for sulfur. The t otal annual flux of antimony, arsenic, cadmium, lead, zinc and vanadiu m into the Arctic from Eurasia was 4,285,47,2400,1350 and 474 tonnes, respectively. This represents 3.4,6.0,4.2,3.0,3.1 and 1.7% of the sour ce emissions, respectively. In contrast, the corresponding flux of sul fur was 2.2 million tonnes or 6.7% of the total emissions. The followi ng percentage contributions to the total flux, of all six metals, by t he source regions were calculated: western Europe (7-34%), eastern Eur ope (42-54%) and the Soviet Union (21-39%). The model also showed that in addition to a late winter (February, March) maximum input to the A rctic, a peak was also observed in October. This peak was shown to hav e resulted from an unusual set of synoptic conditions, which produced a strong northerly flow into the Arctic around 0-degrees longitude in October 1979. Comparison of the model-predicted trace metal concentrat ions with a set of limited observations at existing sampling stations close to the Arctic Circle (namely Ny Alesund in Spitsbergen, Jergul, Skrova and Jan Mayen) showed agreement within a factor of 2-3.