The effects of sunspots on solar irradiance

Details The effects of sunspots on solar irradiance The effects of sunspots on solar irradiance

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...76..211h&link_type=abstract

Solar Physics, vol. 76, Mar. 1982, p. 211-219.

Physics

85

Anisotropic Media, Irradiance, Solar Activity Effects, Stellar Luminosity, Sunspots, Solar Maximum Mission, Spectroradiometers, Stellar Models, Stellar Structure

Scientific paper

It is pointed out that the darkness of a sunspot on the visible hemisphere of the sun will reduce the solar irradiance on the earth. Approaches are discussed for obtaining a crude estimate of the irradiance deficit produced by sunspots and of the total luminosity reduction for the whole global population of sunspots. Attention is given to a photometric sunspot index, a global measure of spot flux deficit, and models for the compensating flux excess. A model is shown for extrapolating visible-hemisphere spot areas to the invisible hemisphere. As an illustration, this extrapolation is used to calculate a very simple model for the reradiation necessary to balance the flux deficit.

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