Long-term downward trend in total solar irradiance

Details Long-term downward trend in total solar irradiance Long-term downward trend in total solar irradiance

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986sci...234.1114w&link_type=abstract

Science (ISSN 0036-8075), vol. 234, Nov. 28, 1986, p. 1114-1117.

Computer Science

Sound

70

Solar Maximum Mission, Solar Radiation, Stellar Luminosity, Climatology, Solar Magnetic Field, Spacecraft Instruments, Sunspot Cycle, Sunspots

Scientific paper

The first 5 years (from 1980 to 1985) of total solar irradiance observations by the first Active Cavity Radiometer Irradiance Monitor (ACRIM I) experiment on board the Solar Maximum Mission spacecraft show a clearly defined downward trend of -0.019 percent/year. The existence of this trend has been confirmed by the internal self-calibrations of ACRIM I, by independent measurements from sounding rockets and balloons, and by observations from the Nimbus-7 spacecraft. The trend appears to be due to unpredicted variations of solar luminosity on time scales of years, and it may be related to solar cycle magnetic activity.

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