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Title:
Large losses of total ozone in Antarctica reveal seasonal ClOx/NOx interaction
Authors:
Farman, J. C.; Gardiner, B. G.; Shanklin, J. D.
Affiliation:
AA(British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK), AB(British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK), AC(British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK)
Publication:
Nature, Volume 315, Issue 6016, pp. 207-210 (1985). (Nature Homepage)
Publication Date:
05/1985
Origin:
NATURE
DOI:
10.1038/315207a0
Bibliographic Code:
1985Natur.315..207F

Abstract

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.
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