27-day variations observed in solar U.V. (120-300 nm) irradiance

Details 27-day variations observed in solar U.V. (120-300 nm) irradiance 27-day variations observed in solar U.V. (120-300 nm) irradiance

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983p%26ss...31.1001r&link_type=abstract

(European Geophysical Society, Meeting on the Structure of the Upper and Middle Atmosphere, Leeds, England, Aug. 23-27, 1982) Pl

Physics

17

Irradiance, Solar Radiation, Spectrum Analysis, Twenty-Seven Day Variation, Ultraviolet Radiation, Absorption Spectra, Aluminum, Atmospheric Temperature, Fourier Transformation, Root-Mean-Square Errors, Upper Atmosphere

Scientific paper

A Fourier-transform analysis of 256 days of SME solar irradiance data (115-303 nm) provides an estimate of the root-mean-square 27-day solar variation. The magnitude of this 27-day variation exceeds + or - 10 percent at 120 nm and decreases with increasing wavelength to less than 1 percent above 260 nm. Qualitative aspects of the analysis include a striking decrease in the percent variation across the aluminum absorption edge near 208 nm.

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