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fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Winchester, John W.; Duce, Robert A. (2011)
Publisher: Co-Action Publishing
Journal: Tellus A
Languages: English
Types: Article

Classified by OpenAIRE into

mesheuropmc: complex mixtures
Previously reported analyses of rain, snow, aerosols, and gas from Hawaii, Alaska, and Massachusetts, and new analyses of Antarctic and Alaska snow and ice, are compared. Both I and Br appear to be associated with aerosols of smaller particle sizes and longer residence times than Cl-rich aerosols. In most suites of samples there is a clustering at I/Br? 0.1-0.2, and Br/Cl exceeds the sea water ratio (3.4 times 10?3) several-fold. Aerosols collected over open sea water in Hawaii, however, show Br/Cl several-fold lower than in sea water. The latter particles are identified as “sea salt” aerosols whereas the Br-rich aerosols are smaller in size and may be basically different in composition, e.g. ammonium sulfate as discussed by Junge (1963). It is suggested that Br is “distilled” from the sea spray droplets, possibly by photochemical oxidation to Br2? and then “condensed” onto the smaller particles, possibly by participating in the oxidation of SO2 to sulfate. Iodine may engage in similar reactions, and the resulting I and Br-rich particles exhibit a world-wide constancy in I/Br. Precipitation analyses show a similar constancy in I/Br.DOI: 10.1111/j.2153-3490.1966.tb00239.x
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    • DUCE,R. A., WASSONJ,. T., WINCHESTERJ., W., and BURNS,F., 1963, Atmospheric iodine, bromine, and chlorine. J. Ueophys. Res., 68, pp. 3943-3947 (Paper I).
    • DUCE,R. A., and WINCHESTERJ., W., 1966, Determination of iodine, bromine, and chlorine in atmospheric samples by neutron activation analysis. Radwchim. Acta, 4, pp. 100-104.
    • DUCER,. A., WINCHESTERJ,. W., and VANNAHL, T. W., 1966, Iodine, bromine, and chlorine in the Hawaiian marine atmosphere. J. Ueophys. Rea., 70, pp. 1775-1799 (Paper 11).
    • DUCE,R. A., WINCHESTERJ., W., and VANN m , T. W., 1966, Iodine, bromine, and chlorine in winter aerosols and snow from Barrow, Alaska. T e l h (PaperIV), 18.
    • JUNQE,c., 1963, Air Chernbtry and Radioactivity. Academic Press, New York.
    • LININQERR, . L., DUCE,R. A., WINCHESTERJ., W., and MATSONW,. R., 1966, Chlorine, bromine, iodine, and lead in aerosols from Cambridge, Masrlschusetts. (Paper 111.)
    • WINCHESTERJ,. W., and DUCE, R. A., 1 9 6 6 ~ . Halogen geochemistry. Tech. Eng. Newu, 47, No. 3, pp. 27-31.
    • WINCHESTERJ., W., and DUCE,R. A., 1966 b, Geochemistry of iodine, bromine, and chlorine in the air-sea-sedimentsystem. Symposium on Marine Ueochembtry Proceedings, University of Rhode Island, October 30-31.
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