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Effect of a stratus cloud on the redistribution and transformation of pollutants

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Abstract

A schematic bidimensional model has been developed to describe an extended stratus formed by warm, moist air in a frontal system. Parcel trajectories are followed through the cloud, and the formation of precipitation is considered on the basis of simple assumptions. To the dynamic description, a chemical module has been coupled, which includes the oxidation of SO2 in aqueous-phase (by H2O2, O2 and radicals scavenged from interstitial air) and that of NO and NO2 in gaseous phase with subsequent dissolution of HNO2 and HNO3. The pH of precipitation is calculated. Sensitivity tests have been run to study the influence of various dynamic, microphysical and chemical parameters, such as cloud base temperature, cloud thickness, vertical velocities, initiation temperature and distribution of precipitation in the cloud, and the initial concentrations of different chemical species.

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References

  • Iribarne, J.V. and Godson, W.L.: 1981, Atmospheric Thermodynamics, 2nd ed. D. Reidel Publ. Co.

  • Mason, B.J.: 1971, The Physics of Clouds, 2nd ed. Clarendon Press, Oxford.

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  • Palmen, E. and Newton, C.W.: 1969, Atmospheric Circulation Systems. Academic Press, New York.

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Authors and Affiliations

  1. Department of Physics, University of Toronto, M5S 1A7, Toronto, Ontario, Canada

    H. -R. Cho & J. V. Iribarne

  2. Ontario Hydro Research Division, 800 Kipling Avenue, M8Z 5S4, Ontario, Toronto, Canada

    T. A. Kavassalis, O. T. Melo & Y. T. Tam

  3. Ontario Hydro Design and Development Division, 700 University Avenue, M5G 1X6, Ontario, Toronto, Canada

    W. J. Moroz

Authors
  1. H. -R. Cho
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  2. J. V. Iribarne
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  3. T. A. Kavassalis
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  4. O. T. Melo
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  5. Y. T. Tam
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  6. W. J. Moroz
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Cho, H.R., Iribarne, J.V., Kavassalis, T.A. et al. Effect of a stratus cloud on the redistribution and transformation of pollutants. Water Air Soil Pollut 30, 195–203 (1986). https://doi.org/10.1007/BF00305189

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  • DOI: https://doi.org/10.1007/BF00305189

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