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Modelling Short-Term Spectral Irradiance Variations

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Abstract

On time-scales of the solar rotation most of the solar irradiance variations are caused by the changing distribution of solar surface magnetic features. We model these short-term irradiance variations using calculations of sunspot and facular contrasts as a function of wavelength and limb angle on the Sun. The position of active regions on the solar disc is derived from the MDI magnetograms. The reconstructed irradiance variations are compared with total and spectral irradiance measurements obtained by the VIRGO experiment on SOHO.

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Authors and Affiliations

  1. Institute of Astronomy, ETH Zentrum, CH-8092, Zurich, Switzerland

    M. Fligge & S.K. Solanki

  2. Institut für Astronomie, Universität Wien, Türkenschanzstr. 17, A-1180, Wien, Austria

    Y.C. Unruh

Authors
  1. M. Fligge
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  2. S.K. Solanki
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  3. Y.C. Unruh
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Fligge, M., Solanki, S. & Unruh, Y. Modelling Short-Term Spectral Irradiance Variations. Space Science Reviews 94, 139–144 (2000). https://doi.org/10.1023/A:1026706920261

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  • DOI: https://doi.org/10.1023/A:1026706920261

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