Atmospheric Science

Sudden cosmic ray decreases: No change of global cloud cover

  1. J. Calogovic1,
  2. C. Albert2,
  3. F. Arnold3,
  4. J. Beer2,
  5. L. Desorgher4,
  6. E. O. Flueckiger4

Article first published online: 3 FEB 2010

DOI: 10.1029/2009GL041327

Issue

Geophysical Research Letters

Geophysical Research Letters

Additional Information

How to Cite

Calogovic, J., C. Albert, F. Arnold, J. Beer, L. Desorgher, and E. O. Flueckiger (2010), Sudden cosmic ray decreases: No change of global cloud cover, Geophys. Res. Lett., 37, L03802, doi:10.1029/2009GL041327.

Author Information

  1. 1

    Hvar Observatory, Faculty of Geodesy, Zagreb, Croatia

  2. 2

    Eawag, Dübendorf, Switzerland

  3. 3

    Max Planck Institute for Nuclear Physics, Heidelberg, Germany

  4. 4

    Physikalisches Institut, University of Bern, Bern, Switzerland

Publication History

  1. Issue published online: 3 FEB 2010
  2. Article first published online: 3 FEB 2010
  3. Manuscript Accepted: 4 JAN 2010
  4. Manuscript Revised: 22 DEC 2009
  5. Manuscript Received: 14 OCT 2009

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Keywords:

  • forbush decrease;
  • clouds;
  • cosmic rays

[1] Currently a cosmic ray cloud connection (CRC) hypothesis is subject of an intense controversial debate. It postulates that galactic cosmic rays (GCR) intruding the Earth's atmosphere influence cloud cover. If correct it would have important consequences for our understanding of climate driving processes. Here we report on an alternative and stringent test of the CRC-hypothesis by searching for a possible influence of sudden GCR decreases (so-called Forbush decreases) on clouds. We find no response of global cloud cover to Forbush decreases at any altitude and latitude.

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