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Polar stratospheric clouds and ozone depletion: Relevance of extendedin situ observations

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Il Nuovo Cimento C

Summary

The occurrence of a springtime ozone depletion over Antarctica appears to be the result of a chain of processes leading to catalitic destruction of the gas by the action of halogen radicals, in particular chlorine oxide. High abundances of ClO in the stratosphere are determined by abnormally low concentrations of nitrogen compounds; such denitrification is likely to be caused by heterogeneous reactions and transport carried out by the clouds present in the polar stratosphere. Stratospheric clouds form during most of the winter and the beginning of spring over the polar regions. Due to scarce accessibility, knowledge of their properties is still poor. Information on extent, particles shape and size distributions is, however, fundamental for the understanding of the magnitude of their contribution to the destruction chain. A balloon-borne experiment, aimed at thein situ observation of cloud particles from 2 to 200 microns in radius, is presented. This would be the first system to provide on-line TV images of cloud particles. The first measurement campaign in Antarctica is planned for the period August–October 1990.

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Abbreviations

PACS 92.60:

Meteorology

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Authors and Affiliations

  1. Istituto di Fisica dell’Atmosfera, CNR-C.P. 27, 00044, Frascati (Roma), Italia

    G. P. Gobbi, A. Adriani & M. Viterbini

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  1. G. P. Gobbi
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  2. A. Adriani
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  3. M. Viterbini
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Gobbi, G.P., Adriani, A. & Viterbini, M. Polar stratospheric clouds and ozone depletion: Relevance of extendedin situ observations. Il Nuovo Cimento C 13, 599–616 (1990). https://doi.org/10.1007/BF02507624

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