Incorporation of physical optics effects and computation of the Legendre expansion for ray-tracing phase functions involving - function transmission.

Mishchenko, M.I. and Macke, Andreas (1998) Incorporation of physical optics effects and computation of the Legendre expansion for ray-tracing phase functions involving - function transmission. Open Access Journal of Geophysical Research: Atmospheres, 103 (D2). pp. 1799-1805. DOI 10.1029/97JD03121.

[img]
Preview
Text
Mishchenko_et_al-1998-Journal_of_Geophysical_Research__Atmospheres_(1984-2012).pdf - Published Version

Download (722Kb) | Preview

Supplementary data:

Abstract

The standard geometric optics (GO) technique predicts that the phase function for large nonspherical particles with parallel plane facets (e.g., hexagonal ice crystals) should have an infinitesimally narrow δ-function transmission peak caused by rays twice transmitted (refracted) in exactly the forward scattering direction. However, exact T-matrix computations and physical considerations based on the Kirchhoff approximation suggest that this peak is an artifact of GO completely ignoring physical optics effects and must be convolved with the Fraunhofer pattern, thereby producing a phase function component with an angular profile similar to the standard diffraction component. This convolution can be performed with a simple procedure which supplements the standard ray-tracing code and makes the computation of the phase function and its Legendre expansion both more physically realistic and more accurate.

Document Type: Article
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-ME Maritime Meteorology
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/97JD03121
ISSN: 2169-8996
Date Deposited: 03 Mar 2008 11:12
Last Modified: 19 Jan 2018 14:21
URI: http://oceanrep.geomar.de/id/eprint/2925

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...