Computer Science
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nascp3086..197l&link_type=abstract
In NASA, Goddard Space Flight Center, Climate Impact of Solar Variability p 197-204 (SEE N91-12456 03-92)
Computer Science
1
Faculae, Irradiance, Models, Modulation, Radiometers, Solar Cycles, Solar Radiation, Sun, Sunspots, Earth Radiation Budget Experiment, Nimbus 7 Satellite, Solar Magnetic Field, Solar Maximum Mission, Variations
Scientific paper
Evidence acquired during the past decade indicates that over time scales of the solar cycle, enhanced emission from bright solar faculae cause significant variations in the sun's total irradiance even though, on shorter time scales, the most pronounced variations are those resulting from the passage of dark sunspots across the solar disc. An empirical model which accounts for the competing effects of dark sunspots and bright faculae has been developed from the available radiometry in cycle 21, and extended back to the beginning of solar cycle 12. According to this model, the largest 11-year modulation of total irradiance during the C20th occurred in the most recent cycle 21.
Foukal Peter
Lean Judith
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