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Condensation nuclei events at 30 km and possible influences of solar cosmic rays

Naturevolume 302pages511514 (1983) | Download Citation

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Abstract

Two recent observations have provided the basis for study of a relationship between solar activity and the formation of small particles in the Earth's atmosphere: the discovery of annual increases of condensation nuclei (CN) at 30 km (refs 1–3) and the detection of sulphuric acid molecules in large negative ion clusters in the 25–35-km altitude region4–7. These observations have now led us to formulate and test a model wherein CN are formed in a ‘polar cloud chamber’ supersaturated with sulphuric acid vapour and triggered by ionization associated with solar flare cosmic radiation. We conclude that such a model provides a potential explanation of the observations.

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References

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    Rosen, J.M. & Hofmann, D.J. Rep. Ap-08 (Dept of Physics & Astronomy, Univ. Wyoming, December, 1981).

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Affiliations

  1. Department of Physics and Astronomy, University of Wyoming, Laramie, Wyoming, 82071, USA

    • D. J. Hofmann
    •  & J. M. Rosen

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https://doi.org/10.1038/302511a0

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