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Uncertainties in reactive uptake coefficients for solid stratospheric particles—2. Effect on ozone depletion
Author(s) -
Carslaw Kenneth S.,
Peter Thomas,
Müller Rolf
Publication year - 1997
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 - 10.1029/97gl01684
Subject(s) - ozone depletion , ozone , nitric acid , sulfuric acid , stratosphere , atmospheric sciences , atmospheric chemistry , chemistry , environmental chemistry , environmental science , inorganic chemistry , physics , organic chemistry
Uncertainties in reactive uptake coefficients for reactions involving HCl, ClONO 2 and HOCl on nitric acid trihydrate (NAT) and sulfuric acid tetrahydrate (SAT) are shown to affect modeled Arctic stratospheric ozone depletion in a photochemical box model. The main contribution to the difference arises from the reaction ClONO 2 + HCl → Cl 2 + HNO 3 in early to mid‐winter. During this period, differences in predicted HCl and ClONO 2 are more than 1 ppbv for several weeks when an upper limit for solid PSC existence is assumed. Ozone depletion is greater when liquid aerosols persist through the winter compared with cases where solid particles are assumed to form.