We present an analysis of chlorine chemistry in the Arctic stratosphere during the winter of 1991/92 and assess its potential implications for ozone depletion. In accordance with observations of total organic chlorine, ClONO2 and HCl, box model results indicate the following: (1) An almost complete activation of chlorine during the cold winter period. (2) A possible contribution from the heterogeneous reaction HOCl + HCl and the gas‐phase reaction CH3O2 + ClO to the complete conversion of HCl to active chlorine. (3) A strong buildup of ClONO2 following PSC disappearance which remains the main chlorine reservoir for about a month, after which HCl becomes dominant. (4) Appreciable chemical ozone loss in the lower stratosphere inside the polar vortex is conceivable for the winter of 1991/92. Copyright 1994 by the American Geophysical Union.
CITATION STYLE
Müller, R., Peter, T., Crutzen, P. J., Oelhaf, H., Adrian, G. P., Clarmann, T. V., … Lary, D. (1994). Chlorine chemistry and the potential for ozone depletion in the Arctic stratosphere in the winter of 1991/92. Geophysical Research Letters, 21(13), 1427–1430. https://doi.org/10.1029/94GL00465
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