Light scattering by hexagonal ice crystals with distributed inclusions

摘要: Abstract Inclusions of air bubbles or soot particles have significant effects on the single-scattering properties ice crystals, that in turn impacts radiation budget an atmosphere containing crystals. This study investigates some case hexagonal including backscattering depolarization ratio, a quantity practical importance interpretation lidar observations. One distinguishing feature is investigation scattering at visible wavelength for crystal with size parameter (x) above 100, regime where one expects agreement between exact methods and geometrical optics methods. expectation generally borne out test comparison how sensitivity to distribution given volume fraction included represented using (i) approximate Monte Carlo Ray Tracing (MCRT) method (ii) numerically pseudo-spectral time-domain (PSTD) method. Another close examination, Invariant-Imbedding T-Matrix (II-TM) method, optical satellite remote sensing vary as inclusions are varied. Although such x>100 faces serious computational burdens force large number idealizations simplifications study, results nevertheless provide intriguing glimpse what evidently quite complex