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Solar irradiance modulation by active regions from 1969 through 1980
Author(s) -
Schatten Kenneth H.,
Miller Nathan,
Sofia Sabatino,
Oster Ludwig
Publication year - 1982
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl009i001p00049
Subject(s) - irradiance , solar irradiance , solar maximum , solar constant , atmospheric sciences , sunspot , solar minimum , environmental science , solar physics , meteorology , physics , solar cycle , optics , astronomy , solar wind , quantum mechanics , magnetic field
The solar irradiance variations resulting from sunspot deficits and facular excesses in emission have been calculated from 1969 through 1980. Agreement appears to exist between our calculations and the major features seen with the Nimbus 7 cavity pyrheliometer and with both the major and minor features detected by The Solar Maximum Mission ACRIM experiment. The 12‐year irradiance variations we calculate suggest a larger variance with increased solar activity, and little change in the average irradiance with solar activity. The largest excursions over these 12 years show a 0.4% variation. Removal of the activity influences upon solar irradiance during the numerous rocket experiments observing the solar "constant" may allow a better value for this quantity to be determined.