The aethalometer — An instrument for the real-time measurement of optical absorption by aerosol particles

Hansen, A.D.A.; Novakov, T; Rosen, H.

doi:10.1016/0048-9697(84)90265-1

Record: found
Abstract: not found
Article: not found

The aethalometer — An instrument for the real-time measurement of optical absorption by aerosol particles

Author(s): A.D.A. Hansen , H. Rosen , T. Novakov

Publication date Created: July 1984

Publication date (Print): July 1984

Journal: Science of The Total Environment

Publisher: Elsevier BV

Read this article at

ScienceOpenPublisher

Bookmark

There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

Abstract

Related collections

Most cited references 9

Record: found
Abstract: found
Article: not found

Absorption of visible radiation in atmosphere containing mixtures of absorbing and nonabsorbing particles.

T Ackerman, O B Toon (1981)

Recent measurements of the single-scattering albedo omega(0) of tropospheric aerosols indicate the presence of a strongly absorbing material which has tentatively been identified as graphitic carbon (soot). Theoretical calculations, based on several different models of the way in which soot might be mixed with other aerosol materials, show that a minimum of 20% soot by volume is necessary to achieve the observed urban value of omega(0) = 0.6. Rural values of the order of 0.8 can be accounted for with 1-5% soot by volume. These same values of omega can be produced by similar amounts of the iron oxide magnetite, which is shown to be virtually indistinguishable from soot by optical measurements performed on bulk samples. Calculations of phase functions for various mixtures of soot also indicate the difficulty of determining aerosol composition by optical scattering techniques. The climatic effects of these absorbing aeorosols are computed using a simple one-layer model, and the results suggest that heating rates in urban pollution layers may be of the order of 4 K/day.