On the Accuracy of the Backward Hemispheric Integrating Nephelometer

Abstract

Modified integrating nephelometers are used to measure backward hemispheric scattering coefficients together with total scattering coefficients. These parameters yield information about the chemical nature of the aerosol particles in certain situations involving relatively pure compounds. They are also used as input parameters in climatic models. In this study the effects of the three angular truncations in the modified integrating nephelometers are investigated. We provide a quantitative base to be used with these instruments to determine hemispheric backscatter of aerosol particles and its relationship to the total scattering coefficient.