Statistics
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.2663p&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 23, p. 2663-2666
Statistics
4
Aerosols, Atmospheric Composition, Ozone, Photochemical Reactions, Sulfates, Trends, Antarctic Regions, Spring (Season), Temperature Distribution, Two Dimensional Models
Scientific paper
A photochemical two-dimensional model including a grid-point temperature distribution calculated from long-term circulation statistics has been used to assess the relative role of heterogeneous reactions of chlorine nitrate on background sulfate aerosols. The sulfuric acid weight percentage is calculated explicitly as a function of temperature and water vapor content. It is shown that the contribution of these reactions to the ozone trend in the 1980s accounts for about only 10% the ozone loss due to N2O5 + H2O during the Northern Hemisphere winter months at mid-latitude and between 50-200 mb. The weight of these reactions, however, may substantially increase in the presence of larger aerosol loading. The reaction ClONO2 + HCl on sulfate aerosols is found to be of comparable importance with respect to ClONO2 + H2O, and it is found to represent a significant source of active chlorine in the Antarctic spring.
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