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Article Dans Une Revue Atmospheric Chemistry and Physics Discussions Année : 2004

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

Résumé

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.
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Dates et versions

hal-00327910 , version 1 (18-06-2008)

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  • HAL Id : hal-00327910 , version 1

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Florence Goutail, Jean-Pierre Pommereau, Franck Lefèvre, M. van Roozendael, S. B. Andersen, et al.. Early unusual ozone loss during the Arctic winter 2002/2003 compared to other winters. Atmospheric Chemistry and Physics Discussions, 2004, 4 (5), pp.5019-5044. ⟨hal-00327910⟩
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