Effect of interannual meteorological variability on mid-latitude O3
Article first published online: 7 DEC 2012
Copyright 1997 by the American Geophysical Union.
Geophysical Research Letters
Volume 24, Issue 23, pages 2993–2996, 1 December 1997
How to Cite
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 10 OCT 1997
- Manuscript Received: 12 AUG 1997
We have used a three-dimensional (3D) chemical transport model (CTM) to investigate the effect of interannual meteorological variability on ozone at middle latitudes. The CTM is forced by UK Meteorological Office analyses, includes a simple parameterization of ozone photochemistry and perturbed chlorine chemistry on polar stratospheric clouds (PSCs) and has been integrated for six years (1991–97). The modelled time series of the O3 column for the Northern Hemisphere middle latitudes shows a significant year-to-year variation which we attribute to transport processes, since the model's chemistry is effectively the same in each year. The model calculates its lowest ozone during 1993. This follows the Mt Pinatubo eruption but in this calculation cannot be due to chemistry on the enhanced aerosol surface area. The model indicates a contribution of the Arctic polar loss to mid-latitude ozone depletion each year during springtime, its influence being seasonal and not accumulating through the years.