31 January 2002 Estimation of optical parameters of yellow sand dust clouds over land surface
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Abstract
The optical parameters of the hazy yellow sand dust over the Takula Makan desert in China and the surface reflectance were estimated, using multi-viewing reflectances and polarizations at the wavelength 443nm in several points selected from ADEOS/POLDER data taken on April 10, 1997. In this case, it was assumed that the land surface is the diffuse reflector and the number size distribution of yellow sands is represented by the Junge power-law. The optical parameters of dust clouds and the ground reflectance were determined such that the relative absolute error between the observed reflectance and polarization and those obtained from the simulation of radiative transfer in the atmosphere-ground system is minimum. As a result, it was found that the refractive index of yellow sand dust is 1.36 to 1.45, the optical thickness of dust clouds is 0.44 to 0.54, the index of Junge power-law is -4.2 to -5.0 and the surface reflectance is 0.1 to 0.17.
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Takashi Kusaka, Takashi Kusaka, Shuhei Mori, Shuhei Mori, Taichi Suzuki, Taichi Suzuki, Hideyoshi Takenaka, Hideyoshi Takenaka, } "Estimation of optical parameters of yellow sand dust clouds over land surface", Proc. SPIE 4539, Remote Sensing of Clouds and the Atmosphere VI, (31 January 2002); doi: 10.1117/12.454424; https://doi.org/10.1117/12.454424
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