A simple method to compute the change in earth-atmosphere radiative balance due to a stratospheric aerosol layer

Details A simple method to compute the change in earth-atmosphere radiative balance due to a stratospheric aerosol layer A simple method to compute the change in earth-atmosphere radiative balance due to a stratospheric aerosol layer

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jats...39.2565l&link_type=abstract

Journal of the Atmospheric Sciences, vol. 39, Nov. 1982, p. 2565-2576.

Mathematics

5

Aerosols, Atmospheric Models, Atmospheric Temperature, Earth Albedo, Stratosphere, Terrestrial Radiation, Cooling, Earth Surface, Infrared Radiation, Mathematical Models, Opacity, Radiative Transfer, Reflected Waves, Solar Radiation, Troposphere

Scientific paper

A computer code was developed in terms of a three-layer model for the earth-atmosphere system, using a two-stream approximation for the troposphere and stratosphere. The analysis was limited to variable atmosphere loading by solar radiation over an unperturbed section of the atmosphere. The scattering atmosphere above a Lambertian ground layer was considered in order to derive the planar albedo and the spherical albedo. Attention was given to the influence of the aerosol optical thickness in the stratosphere, the single scattering albedo and asymmetry factor, and the sublayer albedo. Calculations were performed of the zonal albedo and the planetary radiation balance, taking into account a stratospheric aerosol layer containing H2SO4 droplets and volcanic ash. The resulting ground temperature disturbance was computed using a Budyko (1969) climate model. Local decreases in the albedo in the summer were observed in high latitudes, implying a heating effect of the aerosol. An accompanying energy loss of 23-27 W/sq m was projected, which translates to surface temperature decreases of either 1.1 and 0.45 C, respectively, for background and volcanic aerosols.

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