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Applied Optics

Applied Optics


  • Vol. 39, Iss. 24 — Aug. 20, 2000
  • pp: 4232–4236

Light absorption by black sand dust

Judith C. Chow, Douglas H. Lowenthal, John G. Watson, Steven D. Kohl, Barbara A. Hinsvark, Edward I. Hackett, and John K. McCormack  »View Author Affiliations

Applied Optics, Vol. 39, Issue 24, pp. 4232-4236 (2000)

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Light absorption by fine and coarse aerosols derived from Hawaiian black sand was determined by light transmission. The real part of the refractive index of this material was measured directly, and the imaginary part was estimated. The measured light absorption coefficients (Bap) were adjusted for multiple scattering artifacts by use of absorption-to-extinction ratios estimated with Mie theory. The best agreement between calculated and measured fine and coarse Bap was achieved with a value of 0.014 for the imaginary part of the refractive index. The corresponding absorption efficiencies for the fine and coarse black sand aerosols were 0.22 and 0.09 m2/g, respectively.

© 2000 Optical Society of America

OCIS Codes
(010.1110) Atmospheric and oceanic optics : Aerosols
(010.1120) Atmospheric and oceanic optics : Air pollution monitoring
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(010.1290) Atmospheric and oceanic optics : Atmospheric optics

Original Manuscript: January 3, 2000
Revised Manuscript: June 5, 2000
Published: August 20, 2000

Judith C. Chow, Douglas H. Lowenthal, John G. Watson, Steven D. Kohl, Barbara A. Hinsvark, Edward I. Hackett, and John K. McCormack, "Light absorption by black sand dust," Appl. Opt. 39, 4232-4236 (2000)

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