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Reconstruction of Magnetic Activity of the Sun and Changes in Its Irradiance on a Millennium Timescale Using Neurocomputing

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Abstract

Relations between basic indices of the Sun and the cosmogenic isotope 14C and 10Be records were derived using the Artificial Neural Network (ANN) technique. A reconstruction of the sunspot indices and changes in Total Solar Irradiance (TSI) was carried out. Long-term changes in TSI appear in the amplitude modulation of its 11-year cyclic variation as well as in its lower envelope describing variability of the background irradiance of the Sun. According to the reconstruction the irradiance has increased about 2.5 W m−2 since 1441.

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Authors and Affiliations

  1. Institute of Solar-Terrestrial Physics, P.O. Box 4026, Irkutsk, 664033, Russia

    A. V. Mordvinov

  2. Institute of Mathematics, Almaty, Kazakhstan

    N. G. Makarenko

  3. Physico-Technical Institute, Saint-Petersburg, Russia

    M. G. Ogurtsov

  4. University of Helsinki, Gustav Hällströminkatu 2, POB 64, Finland

    H. Jungner

Authors
  1. A. V. Mordvinov
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  2. N. G. Makarenko
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  3. M. G. Ogurtsov
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  4. H. Jungner
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Correspondence to A. V. Mordvinov.

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Mordvinov, A.V., Makarenko, N.G., Ogurtsov, M.G. et al. Reconstruction of Magnetic Activity of the Sun and Changes in Its Irradiance on a Millennium Timescale Using Neurocomputing. Sol Phys 224, 247–253 (2004). https://doi.org/10.1007/s11207-005-4282-5

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  • DOI: https://doi.org/10.1007/s11207-005-4282-5

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