Experimental determination of scattering matrices of randomly oriented fly ash and clay particles at 442 and 633 nm

DOI: 
Publication date: 
01/01/2001
Main author: 
Muñoz O.
IAA authors: 
Muñoz, O.
Authors: 
Muñoz O., Volten H., De Haan J.F., Vassen W., Hovenier J.W.
Journal: 
Journal of Geophysical Research Atmospheres
Publication type: 
Article
Volume: 
106
Pages: 
22833-22844
Number: 
2000JD000164
Abstract: 
We present measurements of the scattering angle distribution of the whole scattering matrix for randomly oriented particles of three mineral samples: fly ash, green clay, and red clay at 442 and 633 nm. Fly ash consists of aggregates of nearly spherical particles while green clay and red clay particles represent irregular compact particles. We compare the measured results for fly ash with an experimentally determined average scattering matrix which is based on measurements for a broad selection of irregular mineral aerosol particles. We find that the scattering matrix of our polydisperse sample of aggregates of nearly spherical particles differs considerably from that of compact particles. In addition, the angular distribution of the elements of the scattering matrix (except F<inf>22</inf>(θ)/F<inf>11</inf>(θ)) for fly ash particles seem to be dominated by the single monomers. The effects of small differences in composition on the scattering behavior have also been studied by comparing our experimental results for green clay particles with those obtained by Volten et al. [2001] for red clay particles at the same wavelengths. Copyright 2001 by the American Geophysical Union.
Database: 
SCOPUS
Keywords: