Rosinski, J. and Kerrigan, T.C. (2001) The role of extraterrestrial particles in the formation of the ozone hole. Part I: The concentration of extraterrestrial particles at ozone hole formation. Il nuovo cimento C, 24 C (6). pp. 815-842. ISSN 1826-9885
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Abstract
The object of Part I of this paper is to estimate the concentration of extraterrestrial particles in the ozone layer over South Pole, Antarctica, during ozone hole formation. This estimate is based on an analysis of microscopic magnetic spherules collected in an extended program of atmospheric sampling. Spherules are shown to be of extraterrestrial origin and serve as markers for the larger class of less distinguished extraterrestrial particles. These particles settle to ground level as aggregates formed in a stratospheric ice crystal coalescence process. Specific spherule arrivals at ground level are strongly associated with apparent ozone depletion episodes during formation of the ozone hole. The origin of these spherules is a major stream of extraterrestrial particles independent of known meteor showers. The variability in its intensity from year to year corresponds to the variability in ozone depletion in the ozone hole itself. A quantitative theory based on these spherule arrivals and this coalescence process implies that the concentration of extraterrestrial particles at ozone hole formation lies between500 and 2000 / m3. A mechanism is proposed in Part II of this paper by which particle concentrations in this range are sufficient to produce the ozone hole.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Meteorology ; Physics of the neutral atmosphere ; Atmospheric composition(atomic or molecular), chemical reactions and processes ; Atmospheric chemistry |
| Subjects: | 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia |
| Depositing User: | Marina Spanti |
| Date Deposited: | 11 Mar 2020 15:35 |
| Last Modified: | 11 Mar 2020 15:35 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/14731 |
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