Early unusual ozone loss during the Arctic winter 2002/2003 compared to other winters

Total column ozone reduction in the Arctic is evaluated each winter since 1993/1994 by the transport method (3-D CTM passive ozone minus measurements). The cumulative loss from 1 December to the end of the season ranges from 5–10% during warm winters like 1998/1999, 2000/2001 and 2001/2002 up to 30%...

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Bibliographic Details
Published in:Atmospheric chemistry and physics discussions 2004-09, Vol.4 (5), p.5019-5044
Main Authors: Goutail, Florence, Pommereau, Jean-Pierre, Lefèvre, Franck, van Roozendael, M., Andersen, S. B., Kåstad Hoiskar, B. A., Dorokhov, V., Kyrö, E., Chipperfield, M. P., Feng, W.
Format: Article
Language:English
Subjects:
Ocean, Atmosphere
Sciences of the Universe
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Summary:Total column ozone reduction in the Arctic is evaluated each winter since 1993/1994 by the transport method (3-D CTM passive ozone minus measurements). The cumulative loss from 1 December to the end of the season ranges from 5–10% during warm winters like 1998/1999, 2000/2001 and 2001/2002 up to 30%–32% during cold winters like 1994/1995 and 1995/1996. The 23% cumulative loss observed during the winter 2002/2003 is similar in amplitude to the 20–24% measured in 1996/1997 and 1999/2000 but the timing is different. It started unusually early in December after the occurrence of very low temperature at all stratospheric levels between 550 K and 435 K allowing PSC formation and thus chlorine activation. The early ozone loss of 2002/2003 is well captured by current 3-D CTM models.
ISSN:1680-7367
1680-7375