Aerosol optical depth and planetary Albedo in the visible from the Solar Mesosphere Explorer

Details Aerosol optical depth and planetary Albedo in the visible from the Solar Mesosphere Explorer Aerosol optical depth and planetary Albedo in the visible from the Solar Mesosphere Explorer

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.8373n&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, July 20, 1987, p. 8373-8381. NASA-supported research.

Other

4

Aerosols, Earth Albedo, Light Scattering, Optical Thickness, Radiative Transfer, Solar Mesosphere Explorer, Stratosphere, Error Analysis, Nitrogen Dioxide, Volcanoes

Scientific paper

The Solar Mesosphere Explorer (SME) satellite has observed the visible sunlight scattered at the earth's limb since early 1982. By using a radiative-transfer model including multiple scattering and albedo effects, observations at 20 deg N latitude have been interpreted in terms of aerosol optical depth. The ratio of aerosol extinction to Rayleigh extinction at 431.8 nm shows a large increase after the eruption of El Chichon. A maximum ratio of 5 at 36 km and larger than 11 at 30 km occurred in the summer of 1982 followed by a decrease through 1983 and 1984. Aspects of the aerosol time evolution appear to be consistent with other observations and model predictions. Quantitative differences exist between inferred SME and lidar extinction coefficients, possibly due to the different wavelengths of the measurements and to the different scattering phase functions used in the two analyses. It is also shown that visible limb radiances provide information on the planetary albedo, which shows an increase from the equator to the poles with a maximum in the winter hemisphere and a minimum in the summer hemisphere.

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