1982
DOI: 10.1364/ao.21.000382
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Light absorption measurements: new techniques

Abstract: A new radiometer is described which simplifies measurement of the radiation supply of solar wavelengths. Two methods of measuring the radiant energy absorbed by aerosol particles are described: A photometric technique is used for particles collected on filters, and a calorimetric technique is used for in situ measurements. Data collected with the radiometer and the light absorption techniques yield the heating rate of the atmosphere due to light absorption by the particles. Sample measurements show substantial… Show more

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Cited by 15 publications
(1 citation statement)
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“…Particle scattering is a third, and largely independent, source of bias. The integrating plate's design minimizes its response to nonabsorbing particles, but collected particles unavoidably cause some increase in the fraction of incident illumination that is lost to backscattering and thereby miscounted as absorption (Clarke 1982: Hanel et al 1982. This scattering interference is commonly treated as an additive bias that scales with the scattering coefficient of the sampled aerosol (Reid et al 1998;Bond et al 1999;Weingartner et al 2003), as discussed in the following paragraph.…”
mentioning
confidence: 99%
“…Particle scattering is a third, and largely independent, source of bias. The integrating plate's design minimizes its response to nonabsorbing particles, but collected particles unavoidably cause some increase in the fraction of incident illumination that is lost to backscattering and thereby miscounted as absorption (Clarke 1982: Hanel et al 1982. This scattering interference is commonly treated as an additive bias that scales with the scattering coefficient of the sampled aerosol (Reid et al 1998;Bond et al 1999;Weingartner et al 2003), as discussed in the following paragraph.…”
mentioning
confidence: 99%