TERRAPUB Earth, Planets and Space

Earth Planets Space, Vol. 50 (Nos. 6, 7), pp. 513-519, 1998

Polarimetric properties of aerosol particles

Itaru Sano and Sonoyo Mukai

Faculty of Science and Technology, Kinki University, 3-4-1 Kowakae, Higashi-Osaka 577-8502, Japan

(Received October 7, 1997; Revised December 17, 1997; Accepted January 20, 1998)

Abstract: Retrieval algorithms for scattering particles are shown based on photopolarimeric measurements of sky light over the ocean and multiple scattering simulations of the polarization field. Polarized components of the atmospheric constituents have been measured by a photopolarimeter (named PSR1000) with spectral bands set up to correspond to the ADEOS/POLDER. The POLDER is the first sensor on board the satellite to be designed to observe polarization.
It is shown that heterogeneous grains are better than homogeneous models to explain polarimetric properties of atmospheric aerosols, and a Maxwell-Garnett mixing rule for small water-soluble (WS) inclusions in an oceanic (OC) matrix is available to interpret the polarization measurements of atmospheric aerosols over the Seto Inland Sea. We also found during our observations that the value of refractive index of the aerosol, i.e., its chemical composition, varies with time and place rather than particle size.

Corresponding author E-mail: sano@im.kindai.ac.jp

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