Solar radiative output and its variability: evidence and mechanisms

  title={Solar radiative output and its variability: evidence and mechanisms},
  author={Claus Fr{\"o}hlich and Judith L. Lean},
  journal={The Astronomy and Astrophysics Review},
  • C. Fröhlich, J. Lean
  • Published 1 December 2004
  • Physics, Environmental Science
  • The Astronomy and Astrophysics Review
Abstract.Electromagnetic radiation from the Sun is Earth’s primary energy source. Space-based radiometric measurements in the past two decades have begun to establish the nature, magnitude and origins of its variability. An 11-year cycle with peak-to-peak amplitude of order 0.1 % is now well established in recent total solar irradiance observations, as are larger variations of order 0.2 % associated with the Sun’s 27-day rotation period. The ultraviolet, visible and infrared spectral regions… 

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