A Study of Aerosol Chemistry in the Atmosphere over Oceans. Part III: Forms and Air-Sea Fluxes of Metal
环球海洋大气气溶胶化学研究 III：金属形态和入海通量

Fifty eight aerosol samples were collected in the atmosphere over the North Pacific, the South Paci-fic, the Antarctic Peninsula waters, the South Atlantic, the North Indian Oeean, and near shore waters during the Third Chinese Antarctic Expedition and Global Scientific Research Experiment. An atomic absorption spectrophotometry was used to determine water soluble and acid leachable concentrations of Mn, Fe, Pb, Cu and Cd in the aerosols. Concentrations of aerosol metal show obvious gradient in the transport process from the continent to the ocean. The concentration of metals in aerosols is higher in the near shore atmosphere than that in the ocean atmosphere. The contents of metals in aerosols over the North Pacific are higher than those over the South Pacific or over the Antarctic Peninsula waters-The order of water solubilites of aerosol metal over the near shore waters is Cd > Mn > Cu>Fe >Pb with the water soluble fraction of 39%, 36%, 23%, 14% and 5.3%, respectively, and the order over the ereans is Cd > Mn > Fe > Cu >Pb with 62%, 44%,11%,3.1% and 2.5%, respectively. The fluxes of metals from air to sea were also estimated for the investigated shores and oceans.