Abstract
ALTHOUGH liquid water is a minor component of the troposphere, the chemical reactions that occur in water droplets (clouds, fog or rain) affect the composition of the atmosphere and the atmos-pheric input to terrestrial and aquatic ecosystems. Iron (Fe(II) and Fe(III)) is involved in many of these processes, particularly redox and radical chain reactions1–6. Here we report measurements of Fe(II) concentration (up to 200 μ?) in fog water (pH 3–7). We find that a large fraction of the total Fe is present as dissolved Fe(II). The concentrations of Fe(II) increase both with exposure to light and with decreasing pH. The concentrations of dissolved iron in fog droplets are much higher than those measured in oxic surface waters and so atmospheric deposition may be a source of dissolved Fe(II) to surface waters, thereby increasing the availabil-ity of iron to aquatic biota.
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References
Faust, B. C. & Hoigné J. Atmos. Environ. 24A, 79–89 (1990).
Jacob, D. J., Gottlieb, E. W. & Prather, M. J. J. geophys. Res. 94, 12,975–13,002 (1989).
Weschler, C. J., Mandich, M. L. & Graedel, T. E. J. geophys. Res. 91, 5189–5204 (1986).
Graedel, T. E., Mandich, M. L. & Weschler, C. J. J. geophys. Res. 91, 5205–5221 (1986).
Hoffmann, M. R. & Jacob, D. J. in SO2, NO and NO2 Oxidation Mechanisms: Atmospheric Considerations Acid Precipitation Series Vol. 3 (ed. Calvert, J. C.) 101–172 (Butterworth, Boston, 1984).
Martin, L. R. in SO2, NO and NO2 Oxidation Mechanisms: Atmospheric Considerations Acid Precipitation Series Vol. 3 (ed. Calvert, J. C.) 63–100 (Butterworth, Boston, 1984).
Munger, J. W., Jacob, D. J., Waldman, J. M. & Hoffmann, M. R. J. geophys. Res. 88, 5109–5121 (1983).
Johnson, C. A., Sigg, L. & Zobrist, J. Atmos. Environ. 21, 2365–2374 (1987).
Czuczwa, J., Leuenberger, C. & Giger, W. Atmos. Environ. 22, 907–916 (1988).
Sulzberger, B., Suter, D., Siffert, C., Banwart, S. & Stumm, W. Mar. Chem. 28, 127–144 (1989).
Faust, B. C. & Hoffmann, M. R. Environ. Sci. Technol. 20, 943–948 (1986).
Waite, T. D. in Geochemical Processes at Mineral Surfaces American Chemical Society Symp. Ser. 323 (eds Davis, J. A. & Hayes, K. F.) 426–445 (American Chemical Society, Washington, 1986).
Wehrli, B. in Aquatic Chemical Kinetics (ed. Stumm, W.) (Wiley, New York, in the press).
Hoigné, J. in Proc. ARGE ALP Int. Symp. 166–175 (Gesellschaft für Strahlen-und Umweltforschung, Munich, 1988).
Lelieveld, J. & Crutzen, P. J. Nature 343, 227–233 (1990).
Kraft, J. & van Eldik, R. Atmos. Environ. 23, 2708–2713 (1989).
Dasgupta, P. K., Mitchell, P. A. & West, P. W. Atmos. Environ. 13, 775–782 (1979).
Fuzzi, S. et al. J. geophys. Res. 93, 11,141–11,151 (1988).
Duce, R. A., Arimoto, R., Ray, B. J., Unni, C. K. & Harder, P. J. J. geophys. Res. 88, 5321–5342 (1983).
Martin, J. H. & Fitzwater, S. E. Nature 331, 341–343 (1988).
Jacob, D. J., Waldman, J. M., Haghi, M., Hoffmann, M. R. & Flagan, R. C. Rev. Sci. Instrum. 56, 1291–1293 (1985).
Mallant, R. in Chemistry and Physics of Fogwater Collection (eds Jaeschke, W. & Enderle, K. H.) 123–137 (Gesellschaft für Strahlen- und Umweltforschung, Munich, 1988).
Stookey, L. L. Analyt. Chem. 42, 779–781 (1970).
Siffert, C. thesis, Swiss Fed. Inst. of Technol., Zürich (1989).
Dong, S. & Dasgupta, P. K. Environ. Sci. Technol. 21, 581–588 (1987).
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Behra, P., Sigg, L. Evidence for redox cycling of iron in atmospheric water droplets. Nature 344, 419–421 (1990). https://doi.org/10.1038/344419a0
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DOI: https://doi.org/10.1038/344419a0
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