Resumo

ALVAREZ-MADRIGAL, M  e  PEREZ-PERAZA, J. Differences in the monthly evolution of the Antarctic ozone hole size. Atmósfera [online]. 2007, vol.20, n.2, pp.215-221. ISSN 0187-6236.

We study here the evolution of the ozone hole size (OHS) with the aim of contributing to understand the long term evolution and the origin of the discrepancies between modeled and observed size. Using the September, October and November monthly average data of the OHS, for the years 1982-2003, we separate the series into two components: a linear and a residual one. The residual OHS components for October-November, shows a tendency to decrease after 1997, whereas the residual component of September does not show a clear decrease. The OHS during September evolve different, in relation to the other months. Therefore, the earlier results for the OHS analysis obtained with an annual approach may be refined.

Palavras-chave : Ozone hole; Antarctic; zone depletion; ozone recovery.

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