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Measurements of the absorption coefficient of stratospheric aerosolsThe absorption coefficients of stratospheric aerosols are measured using a variation on the integrating plate method. The technique is based on the decrease in the transparency of a substrate when an absorbing aerosol is deposited on it. A Lambert scatterer is placed behind the substrate to integrate forward scattered light and minimize the effect of scattering on the measurement. The low pressure in the stratosphere is used for the direct impaction of particles onto a narrow strip of opal glass. The eight samples collected had a median value of 4 x 10 to the -9th m with an uncertainty of + or - 5 x 10 to the -9th m. If this absorption is due to graphitic carbon, then its concentration is estimated at about 0.4 ng/cu m, or about 0.25% of the total aerosol mass concentration. Estimates of the aerosol scattering coefficients based on satellite extinction inversions result in an aerosol single-scattering albedo in the range of 0.96-1.0.
Document ID
Document Type
Reprint (Version printed in journal)
Ogren, J. A.
(Washington Univ. Seattle, WA, United States)
Ahlquist, N. C.
(Washington Univ. Seattle, WA, United States)
Clarke, A. D.
(Washington Univ. Seattle, WA, United States)
Charlson, R. J.
(Washington, University Seattle, Wash., United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1981
Publication Information
Publication: Geophysical Research Letters
Volume: 8
Subject Category
Accession Number
Funding Number(s)
Distribution Limits

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