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The importance of the reactions between OH and ClO for stratospheric ozone
Author(s) -
Toumi R.,
Bekki S.
Publication year - 1993
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 - 10.1029/93gl02999
Subject(s) - stratosphere , ozone , atmospheric sciences , sink (geography) , ozone depletion , radiative transfer , atmospheric chemistry , environmental science , ozone layer , climatology , chemistry , meteorology , physics , geology , cartography , quantum mechanics , geography
Recent analysis of ozone trends in the upper stratosphere suggest that models overestimate the decrease of ozone in the upper stratosphere over the last decade (WMO, 1992). We have included the reaction OH + ClO → HCl + O 2 in a two‐dimensional radiative‐chemical‐transport model and find that this reaction reduces the ClO/HCl ratio to agree better with observations. The calculated trend in the upper stratosphere is lower and agrees well with some observations. The effect of this reaction on the lower stratosphere is small. The reaction OH + ClO → Cl + HO 2 is the main sink for OH in regions of elevated ClO and low ozone such as during the Antarctic Spring.