Physics
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18..833p&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 18, May 1991, p. 833-836. Research supported by CEC and Italian Antarctic Pr
Physics
15
Aerosols, Atmospheric Chemistry, Ozone Depletion, Stratosphere, Sulfates, Atmospheric Models, Chlorine Compounds, Pollution Transport, Two Dimensional Models, Volcanoes
Scientific paper
The effects of sulfate aerosols on stratospheric ozone have been studied with a two-dimensional model. The model includes a comprehensive chemical code for homogeneous and heterogeneous reactions; both background and volcanic aerosols have been taken into account according to different scenarios. The basic temperature field is prescribed, while the perturbation introduced by the presence of volcanic aerosols is predicted. Increase of total chlorine in the stratosphere causes ozone depletion by itself, but the effects could be highly enhanced in presence of a large amount of volcanic aerosols that affect the balance of nitrogen and chlorine reservoirs through heterogeneous chemical reactions. For a volcanic eruption similar to El Chichon it is shown that the maximum O3 depletion is to be expected at high latitudes in Spring, because of a large chemical destruction acting in situ.
Pitari Giovanni
Rizi Vincenzo
Visconti Guido
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