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Nature 460, 332-333 (16 July 2009) | doi:10.1038/460332a; Published online 15 July 2009
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Atmospheric physics: Cosmic rays, clouds and climate
Ken Carslaw1
Abstract
Galactic cosmic rays could influence Earth's cloudiness by creating aerosol particles that prompt cloud formation. That possible effect looks to be smaller than thought, but the story won't end there.
Striking correlations have been observed between Earth's cloud cover and the flux of galactic cosmic rays entering our atmosphere. The decrease in galactic cosmic ray (GCR) flux by about 15% over much of the twentieth century has led to the hypothesis that GCRs could influence climate through their effect on cloudiness.
- Ken Carslaw is in the School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.
Email: k.s.carslaw@leeds.ac.uk
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