Vol. 5, No. 2, 137-145, 2006
Tomonori Tanikawa, Teruo Aoki, Masahiro Hori, Akihiro Hachikubo and Masamu Aniya
Abstract
Citation EARSeL European Association of Remote Sensing Laboratories, Strasbourg, France BIS-Verlag
Radiative transfer models,
using non-spherical snow particles, were developed to examine the effect of
snow grain shape on the angular distribution of snow reflectance. To represent
the natural ice crystals, surface roughness is added to the ray-tracing
calculation in the single-scattering calculation. For validation of the
radiative transfer model, we compared the simulated angular distribution of the
reflectance with the observed one. For the new snow, the comparison between the
simulated results using cylindrical ice particles with rough surface and the
observed ones show good agreement for any viewing angle. For granular snow, the
simulated results using ellipsoids in the visible region are consistent with
the observed ones while in the near-infrared region the angular distribution of
the reflectance is approximately simulated. The angular distribution of the
reflectance depends on the snow grain shape and the surface roughness of ice
crystals, and on the surface roughness providing a smooth reflectance pattern. Radiative
transfer models of snow using non-spherical particles with rough surface are
more suitable than those of snow using spherical particles for the calculation
of the angular distribution of the reflectance.
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History
Submitted: 23 Feb 2005
Revised: 12 Apr 2006
Accepted: 12 Apr 2006
Published: 03 May 2006
Tanikawa T, T Aoki, M Hori, A Hachikubo & M Aniya, 2006.
Snow bidirectional reflectance model using non-spherical snow particles and its validation with field measurements.
EARSeL eProceedings, 5(2): 137-145
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