The variability of the solar constant

Details The variability of the solar constant The variability of the solar constant

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985crasb.301..151d&link_type=abstract

Academie des Sciences (Paris), Comptes Rendus, Serie II Mecanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Terre

Physics

Solar Constant, Solar Cycles, Faculae, Solar Flux, Solar Maximum Mission, Sunspots, Variability

Scientific paper

The solar-constant variations which were measured from Feb. 16-Nov. 7, 1980 by means of the NASA ACRIM experiment on board the SMM satellite are analyzed. It is shown that if the radiative deficit produced by the passage of sunspots on the solar disk and the radiative flux excess produced by the passage of faculae at the edge of the solar disk are introduced on a weekly basis, the measured variations can be reproduced. Meudon Observatory synoptic maps are used to measure the faculae surfaces. An empirical model which specifies the relation between the activity cycle and the long-term solar-constant variations is presented. A relative decrease of the solar constant at the time of the sunspot activity minimum is predicted.

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