Receptor modeling of globally-circulating airborne particles collected at Mauna Loa Observatory, Hawaii

Weekly airborne particle samples were collected at Mauna Loa Observatory (MLO), Hawaii from February 1979 through May 1985. Ambient particles collected at MLO during non-dust, downslope wind conditions, represent mid-tropospheric background particles of the Northern Hemisphere. From mid-February through late June, the concentrations of ambient crustal material at MLO increase by an order of magnitude due to the influx of Asian dust.;Receptor models were used to identify sources of airborne particles at MLO, determine compositions of particles from these sources, and assess the relative impacts of them. Major sources of ambient particles at MLO include Asian continental material, oceanic biological production of Se and SO;During the dust season, Asian continental material accounts for 80% of total suspended particulate material (TSP) at MLO, oceanic production of Se and SO;During the clean (non-dust) season, the oceanic biological production of Se and SO...