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Aerosol‐Mediated Partitioning of Stratospheric Cl y and NO y at Temperatures Above 200 K
Author(s) -
Michelsen H. A.,
Spivakovsky C. M.,
Wofsy S. C.
Publication year - 1999
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 - 10.1029/1998gl900281
Subject(s) - aerosol , halogen , sink (geography) , chemistry , analytical chemistry (journal) , environmental chemistry , atmospheric sciences , geology , organic chemistry , alkyl , cartography , geography
Rates of aerosol‐mediated reactions involving inorganic halogen species are small but non‐negligible for moderate aerosol abundances at temperatures of 200–210 K. We have used a photochemical model to demonstrate that at these temperatures such reactions provide a significant sink for HCl. Gas‐phase production rates are slower for HCl than for ClNO 3 . The net result is preferential partitioning of Cl y into [ClNO 3 ] to compensate for the accelerated loss of [HCl]. Under such conditions, [HNO 3 ] decreases in response to enhanced partitioning of NO y into [ClNO 3 ]. The results indicate a high sensitivity and synergistic response of HCl, ClNO 3 , and HNO 3 distributions to aerosol content and temperature.