Physics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1007w&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 18, June 1991, p. 1007-1010.
Physics
12
Aerosols, Antarctic Regions, Clouds (Meteorology), Reaction Kinetics, Stratosphere, Sulfuric Acid, Chlorine Oxides, Hydrochloric Acid
Scientific paper
Ways that HCl could be present in sulphuric acid areosol that remains liquid even at the lowest stratospheric temperatures are examined in the light of new field data and of laboratory data. Evidence is gathered to show that reactions occurring on liquid sulphuric acid aerosol may be those that initially convert Cl to its active form. It is proposed that as the temperature falls, sulphuric acid aerosol absorbs water until about 198 K, where it contains only 50 percent H2SO4, so that HCl can be absorbed in appreciable quantities. It is suggested that the sulphuric acid aerosol may still be present with a surface area comparable to the polar stratospheric clouds. Only if sulphuric acid aerosol is frozen is it likely that reactions on PSCs will dominate.
Mulvaney Robert
Wolff Eric W.
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