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Chamaillard, K,Jennings, SG,Ceburnis, D,Yoon, YJ,O'Dowd, C
2010
March
Journal Of Quantitative Spectroscopy & Radiative Transfer
Effect of instrumental particle sizing resolution on the modelling of aerosol radiative parameters
Published
()
Optional Fields
Aerosol radiative parameters Scattering coefficient Instrumental and numerical accuracy Remote sensing SKY-RADIANCE MEASUREMENTS LIGHT-SCATTERING SEA-SALT RESPONSE CHARACTERISTICS OPTICAL-PROPERTIES SIZE DISTRIBUTION MINERAL AEROSOL MARINE AEROSOL MACE HEAD CLIMATOLOGY
111
753
771
A more realistic estimation of the scattering and hemispheric backscattering coefficients, sigma(sp) and sigma(bsp), and their respective optical cross section, C-sca and C-bk,C- of aerosol particles is presented on the basis of the exact resolution of the width of the size bins of the particle counter instruments when size distribution measurements are used, and, with the exact optical detector instruments ability. The scattering and hemispheric backscattering cross sections, C-sca and C-bk, of the particles are averaged over the full size bins of the particle counter instrument, while these quantities are usually estimated only oil the value of the mean geometric diameter of each size bin Six instruments. the APS, ASASP-X, DMPS. FSSP-100, ELPI, and SMPS frequently used in particle size distribution measurements are reviewed. for spherical sea-salt particles at a wavelength lambda=0.55 mu m. The comparison using the conventional geometric mean diameter versus the use of the full size bin leads to large amount of errors for the optical cross section with non-negligible effects on their respective optical coefficients. The maximal accuracy expected for these optical quantities depend on the particle diameter as well as on the channel width of the instruments. and are also function of the angular detector probe used to measure them (C) 2009 Elsevier Ltd. All rights reserved
DOI 10.1016/j.jqsrt.2009.11.005
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