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Accurate simulation of the optical properties of atmospheric ice crystals with the invariant imbedding T-matrix method.
- Source :
-
Journal of Quantitative Spectroscopy & Radiative Transfer . May2014, Vol. 138, p17-35. 19p. - Publication Year :
- 2014
-
Abstract
- Abstract: The invariant imbedding T-matrix method (II-TM) is employed to compute the optical properties of randomly oriented ice crystals of various shapes including hexagonal columns, hollow columns, droxtals, bullet rosettes and aggregates. The II-TM is shown to be numerically stable and capable of obtaining the single-scattering properties of hexagonal ice crystals with size parameters up to 150. The 22° and 46° halo peaks in the phase function of compact hexagonal ice crystals begin to emerge at a size parameter of approximately 80 and tend to become insensitive to particle size as the corresponding size parameter approaches 150. Furthermore, the II-TM solutions are shown to be in agreement with their counterparts based on the discrete dipole approximation (DDA) method and the pseudo-spectral time-domain (PSTD) method. In addition, the accuracy of the improved geometric-optics method (IGOM) is examined for randomly oriented hexagonal ice crystal cases over a wide size-parameter range from the resonant to geometric-optics regimes. The II-TM is also used to study the effects of particle surface roughness and internal inclusions on the single-scattering properties of ice particles. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00224073
- Volume :
- 138
- Database :
- Academic Search Index
- Journal :
- Journal of Quantitative Spectroscopy & Radiative Transfer
- Publication Type :
- Academic Journal
- Accession number :
- 95022880
- Full Text :
- https://doi.org/10.1016/j.jqsrt.2014.01.013