Contributions of Particle Absorption to Mass Extinction Coefficients (0. 55-14Micrometer) of Soil-Derived Atmospheric Dusts

Abstract

Mass extinction coefficients of soil-derived atmospheric dust often are determined largely by the absorption (rather than scattering) by individual particles, especially at longer infrared wavelengths. Under many conditions, reasonable estimates of mass extinction coefficients of dusts can be made from absorption coefficients without detailed knowledge of particle optical constants to perform, for example, Mie calculations. This report discusses absorption coefficients of dusts in the visible and IR wavelengths and the physical mechanisms of dust aerosol generation determining that portion of extinction attributable to absorption in a given dust cloud. Some soils, especially clays, can produce dust clouds that are almost pure absorbers at longer IR wavelengths. Soils, Dusts, Aerosols, Optical extinction, Infrared absorption, Extinction coefficients, Fort Benning, Atmospheric dusts, Dust minerals.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1988
Accession Number
ADA203377

Entities

People

  • Hugh R. Carlon

Organizations

  • Edgewood Chemical Biological Center

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Coefficients
  • Atmospheric Windows
  • Base Lines
  • Classification
  • Engineering
  • Materials
  • Minerals
  • Optical Properties
  • Particle Size
  • Particles
  • Phyllosilicates
  • Refraction
  • Refractive Index
  • Scattering
  • Security
  • United States

Readers

  • Aerosol Science/Aerosol Physics
  • Spectroscopy.