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The polar stratospheric cloud event of January 24: Part 2, PHotochemistry
Author(s) -
Jones R. L.,
Solomon S.,
McKenna D. S.,
Poole L. R.,
Brune W. H.,
Toohey D. W.,
Anderson J. G.,
Fahey D. W.
Publication year - 1990
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/gl017i004p00541
Subject(s) - stratosphere , polar , atmospheric sciences , troposphere , mixing ratio , arctic , atmospheric chemistry , aerosol , environmental science , ozone depletion , ozone , photodissociation , polar vortex , chlorine , air mass (solar energy) , atmosphere (unit) , meteorology , photochemistry , chemistry , geology , physics , astronomy , oceanography , organic chemistry , boundary layer , thermodynamics
During the 1988/89 Airborne Arctic Stratospheric Expedition (AASE), observations of the chemical composition, aerosol characteristics and atmospheric state were obtained from two aircraft, a NASA ER‐2 and a DC‐8. In this paper we present a diagnosis of observations obtained using the ER‐2 on January 24, 1989, using a Lagrangian coupled microphysical‐photochemical model. We interpret the high chlorine monoxide mixing ratios observed from the ER‐2 on the afternoon of January 24, 1989 as a result of in situ heterogeneous release of reactive chlorine from the reservoirs HCl and ClONO 2 on type 1 polar stratospheric cloud particles observed to be present at that time. This essential element in theories of polar ozone depletion has never before been observed directly in the stratosphere.