Length of the Solar Cycle: An Indicator of Solar Activity Closely Associated with Climate

@article{Friischristensen1991LengthOT,
  title={Length of the Solar Cycle: An Indicator of Solar Activity Closely Associated with Climate},
  author={E. Friis-christensen and Knud Lassen},
  journal={Science},
  year={1991},
  volume={254},
  pages={698 - 700}
}
It has recently been suggested that the solar irradiance has varied in phase with the 80- to 90-year period represented by the envelope of the 11-year sunspot cycle and that this variation is causing a significant part of the changes in the global temperature. This interpretation has been criticized for statistical reasons and because there are no observations that indicate significant changes in the solar irradiance. A set of data that supports the suggestion of a direct influence of solar… 

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