Nature Publishing Group, publisher of Nature, and other science journals and reference works
my account e-alerts subscribe register
Thursday 19 October 2017
Journal Home
Current Issue
Download PDF
Export citation
Export references
Send to a friend
More articles like this

Letters to Nature
Nature 315, 207 - 210 (16 May 1985); doi:10.1038/315207a0

Large losses of total ozone in Antarctica reveal seasonal ClOx/NOx interaction

J. C. Farman, B. G. Gardiner & J. D. Shanklin

British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK

Recent attempts1,2 to consolidate assessments of the effect of human activities on stratospheric ozone (O3) using one-dimensional models for 30° N have suggested that perturbations of total O3 will remain small for at least the next decade. Results from such models are often accepted by default as global estimates3. The inadequacy of this approach is here made evident by observations that the spring values of total O3 in Antarctica have now fallen considerably. The circulation in the lower stratosphere is apparently unchanged, and possible chemical causes must be considered. We suggest that the very low temperatures which prevail from midwinter until several weeks after the spring equinox make the Antarctic stratosphere uniquely sensitive to growth of inorganic chlorine, ClX, primarily by the effect of this growth on the NO2/NO ratio. This, with the height distribution of UV irradiation peculiar to the polar stratosphere, could account for the O3 losses observed.



1. Cicerone, R. J., Walters, S. & Liu, S. C. J. geophys. Res. 88, 3647−3661 (1983). | ISI | ChemPort |
2. Prather, M. J., McElroy, M. B. & Wofsy, S. C. Nature 312, 227−231 (1984). | PubMed | ISI | ChemPort |
3. The Stratosphere 1981, Theory and Measurements (WMO Global Ozone Research and Monitoring Project Rep. No. 11, 1981).
4. Farman, J. C. & Hamilton, R. A. Br. Antarct. Surv. Sci. Rep. No. 90 (1975).
5. Farman, J. C. Phil. Trans. R. Soc. B279, 261−271 (1977). | ISI |
6. Farman, J. C., Murgatroyd, R. J., Silnickas, A. M. & Thrush, B. A. Q. Jl R. met. Soc. (submitted).
7. McKenzie, R. L. & Johnston, P. V. Geophys. Res. Lett. 11, 73−75 (1984). | ISI | ChemPort |
8. Johnston, H. S. & Podolske, J. Rev. Geophys. Space Phys. 16, 491−519 (1978). | ChemPort |
9. Chemical Kinetics and Photochemical Data for Use in Stratospheric Modelling, Evaluation No. 6 (JPL Publ. 83−62, 1983).
10. Dunkerton, T. J. atmos. Sci. 35, 2325−2333 (1978). | Article | ISI |
11. Dopplick, T. G. J. atmos. Sci. 29, 1278−1294 (1972). | Article | ISI |

© 1985 Nature Publishing Group
Privacy Policy