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A simple method to compute the change in earth-atmosphere radiative balance due to a stratospheric aerosol layerA 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.
Document ID
19830034721
Document Type
Reprint (Version printed in journal)
Authors
Lenoble, J. (Universite des Sciences et Techniques de Lille France)
Tanre, D. (Universite des Sciences et Techniques de Lille France)
Deschamps, P. Y. (Universite des Sciences et Techniques de Lille France)
Herman, M. (Lille I, Universite Villeneuve D'Ascq, Nord, France)
Date Acquired
August 11, 2013
Publication Date
November 1, 1982
Publication Information
Publication: Journal of the Atmospheric Sciences
Volume: 39
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAS1-17032
Distribution Limits
Public
Copyright
Other