Cosmic ray decreases affect atmospheric aerosols and clouds

  title={Cosmic ray decreases affect atmospheric aerosols and clouds},
  author={Henrik Svensmark and Torsten Bondo and Jacob Svensmark},
  journal={Geophysical Research Letters},
Close passages of coronal mass ejections from the sun are signaled at the Earth's surface by Forbush decreases in cosmic ray counts. We find that low clouds contain less liquid water following Forbush decreases, and for the most influential events the liquid water in the oceanic atmosphere can diminish by as much as 7%. Cloud water content as gauged by the Special Sensor Microwave/Imager (SSM/I) reaches a minimum ≈7 days after the Forbush minimum in cosmic rays, and so does the fraction of low… 

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