Reconstruction of solar irradiance using the Group sunspot number

Details Reconstruction of solar irradiance using the Group sunspot number Reconstruction of solar irradiance using the Group sunspot number

2007-03-07

arxiv.org/abs/astro-ph/0703147v1

Adv.SpaceRes.40:986-989,2007

Astronomy and Astrophysics

Astrophysics

10 pages, 5 figures, Advances in Space Research, in press

Scientific paper

10.1016/j.asr.2007.02.077

We present a reconstruction of total solar irradiance since 1610 to the present based on variations of the surface distribution of the solar magnetic field. The latter is calculated from the historical record of the Group sunspot number using a simple but consistent physical model. Our model successfully reproduces three independent data sets: total solar irradiance measurements available since 1978, total photospheric magnetic flux from 1974 and the open magnetic flux since 1868 (as empirically reconstructed from the geomagnetic aa-index). The model predicts an increase in the total solar irradiance since the Maunder Minimum of about 1.3 \rm{Wm$^{-2}$}.

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