Physics
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983p%26ss...31..987s&link_type=abstract
(European Geophysical Society, Meeting on the Structure of the Upper and Middle Atmosphere, Leeds, England, Aug. 23-27, 1982) Pl
Physics
9
Atmospheric Chemistry, Photodissociation, Solar Radiation, Solar Terrestrial Interactions, Ultraviolet Radiation, Absorption Cross Sections, Atmospheric Attenuation, Irradiance, Oxygen, Ozone, Solar Cycles
Scientific paper
Parameters used as input data for photochemical models of the atmosphere are discussed, with attention focused on the solar irradiance, the absorption cross-section of molecular oxygen and ozone, and Rayleigh scattering. Solar irradiance from 135-400 nm, is grouped into 135-175, 175-210, and wavelengths longer than 210 nm, although the shorter wavelength input is known to only 20 percent accuracy (5 percent accuracy has been achieved with wavelengths in excess of 300 nm). Absorption occurs in the Lyman alpha and Schumann-Runge bands, as well as the Herzberg continuum, with Rayleigh scattering accounting for attenuation of the radiative input. Further measurements are needed to assess the penetration at different wavelengths, and to quantify the effects of multiple scattering and ground albedo.
Brasseur Guy
Simon Paul C.
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