Physics
Scientific paper
Apr 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25..995w&link_type=abstract
Geophysical Research Letters, Volume 25, Issue 7, p. 995-998
Physics
14
Atmospheric Composition And Structure: Cloud Physics And Chemistry, Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry, Atmospheric Composition And Structure: Volcanic Effects, Atmospheric Composition And Structure: Evolution Of The Atmosphere
Scientific paper
In situ measurements of hydrochloric acid in the lower stratosphere reveal that its mean abundance relative to that of total inorganic chlorine (Cly) has evolved upwards from HCl/Cly=40% in late 1991 to 70% in 1996. This fraction is generally anticorrelated with aerosol surface area concentration, which has been diminishing since the 1991 volcanic eruption of Mt. Pinatubo. Calculations incorporating new laboratory results of faster heterogeneous chemistry show that air parcels with high aerosol loading exposed to temperatures below 205 K can experience enough chlorine activation to drive the HCl/Cly below 50%, but overestimate observed ClO/Cly.
Baumgardner Darrel
Brock Charles A.
Dye James E.
Flesch G. J.
Herman Redina L.
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