Nephelometer optical response model for the interpretation of atmospheric aerosol measurements.

Nephelometer optical response model for the interpretation of atmospheric aerosol measurements. Research Abstract Details 

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Nephelometer optical response model for the interpretation of atmospheric aerosol measurements. Abstract Text:

J M Rosen,R G Pinnick,D M Garvey,

A numerical model evaluating the response of a typical integrating nephelometer is described. The model incorporates the actual scattering geometry as well as the effects of a finite light source, detector size, and a nonideal Lambertian diffuser. An angular scattering weighting function is introduced to provide a tractable approach in numerical calculations and easy application. Using established size distribution ensembles associated with a few representative aerosol types, we compare the calculated response of a real nephelometer with that of an ideal, or perfect, nephelometer. The results indicate that, frequently, the nephelometer-produced aerosol-scattering coefficient is of the order of 10-20% too small; but for some naturally occurring aerosols, the difference may be as large as 40-50%. For a multiple-wavelength nephelometer, the response model can be employed to estimate the expected error in the aerosol-scattering coefficients directly from the measurements themselves.

Nephelometer optical response model for the interpretation of atmospheric aerosol measurements. Publishing Authors By Initials

JM Rosen,RG Pinnick,DM Garvey,

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Nephelometer optical response model for the interpretation of atmospheric aerosol measurements. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Applied optics

VOLUME: 36

Page Numbers: 2642-9

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ISSN: 0003-6935

DAY: 20

MONTH: Apr

YEAR: 1997

Nephelometer optical response model for the interpretation of atmospheric aerosol measurements. Information

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LANGUAGE: eng

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Country: United States

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MEDLINETA: Appl Opt

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