Impact of Cosmic Rays on Stratospheric Chlorine Chemistry and Ozone Depletion

Phys. Rev. Lett. 91, 058502 – Published 31 July 2003
Rolf Müller


Dissociation induced by cosmic rays of chlorofluorocarbons (CFC) and HCl on the surfaces of polar stratospheric clouds (PSC) has been suggested as playing a significant role in causing the ozone hole. However, observed stratospheric CFC distributions are inconsistent with a destruction of CFC on PSC surfaces and no significant correlation exists between ozone levels and cosmic-ray activity inside the polar regions. Model simulations indicate that this mechanism can have only a limited impact on chemical ozone loss and thus on the recovery of stratospheric ozone.


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  • Received 13 March 2003
  • Published 31 July 2003

© 2003 The American Physical Society

Authors & Affiliations

Rolf Müller*

  • ICG-I, Research Centre Jülich, 52425 Jülich, Germany

  • *Electronic address: ro.mueller@fz-juelich.deURL:

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