Physics
Scientific paper
Nov 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983georl..10.1013d&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 10, Nov. 1983, p. 1013-1016.
Physics
32
Aerosols, Optical Thickness, Solar Radiation, Spectral Signatures, Stratosphere, Volcanoes, Atmospheric Attenuation, Clouds, Cv-990 Aircraft, Latitude
Scientific paper
Stratospheric aerosol optical depths at five discrete solar wavelengths are calculated from solar extinction measurements made on board a NASA Convair 990 aircraft between 55 deg N and 6 deg S latitude during December 1982. The latitudinal and spectral variations of the aerosol optical depths, presumed to be due to effluents from the eruptions of El Chichon, show a north to south separation into two components, each with a characteristic spectral signature. The average aerosol optical depth, both spatially and spectrally, was 0.10 + or - 0.01. Calculations indicate that this enhancement is sufficient to cause an 18 percent decrease in direct broadband solar irradiance at a representative zenith angle of 60 deg.
Deluisi John J.
Dutton E.
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