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Activation of stratospheric chlorine by reactions in liquid sulphuric acid
Author(s) -
Cox R. A.,
MacKenzie A. R.,
Müller R. H.,
Peter Th.,
Crutzen P. J.
Publication year - 1994
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/93gl03073
Subject(s) - stratosphere , aerosol , dissolution , chlorine , hydrolysis , frost (temperature) , ozone , atmospheric sciences , sulfuric acid , environmental chemistry , chemical reaction , chemistry , inorganic chemistry , environmental science , meteorology , geology , organic chemistry , physics
Active chlorine release on H 2 SO 4 aerosol particles via the reaction of HOCl and HCl in solution is discussed. Based on current laboratory data, the process is shown to have an appreciable rate at temperatures below about 195 K, when the aerosol particles become sufficiently dilute to allow both HCl dissolution and fast ClONO 2 hydrolysis. Evolution of part‐per‐billion concentrations of Cl 2 could be significant in cases in which volcanically enhanced aerosol remains liquid until the frost point (≈ 190 K) as observed on several occasions in the Arctic stratosphere.