کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5427554 1508633 2016 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of surface roughness with two scales on light scattering by hexagonal ice crystals large compared to the wavelength: DDA results
موضوعات مرتبط
مهندسی و علوم پایه شیمی طیف سنجی
پیش نمایش صفحه اول مقاله
Effects of surface roughness with two scales on light scattering by hexagonal ice crystals large compared to the wavelength: DDA results
چکیده انگلیسی


- Creation of rough hexagonal prism geometry for light scattering computations.
- Measurement of surface roughness parameters from a dust grain.
- ADDA light scattering simulation results.
- Roughness features larger than the wavelength cause big changes in light scattering.
- Roughness-induced changes increase when more than one roughness scale is considered.

The effect of ice crystal surface roughness on light scattering by ice crystals which are large compared to the wavelength was studied, in particular changes to the 2D scattering patterns, azimuthally averaged phase functions, degree of linear polarisation patterns and asymmetry parameters for a range of orientations and roughness scales. It was found that roughness has an effect on light scattering by hexagonal prisms, particularly when the roughness features are of comparable size to the wavelength. The roughness model that has the most effect on light scattering takes account of more than one roughness scale.Rough geometry was implemented by a Gaussian roughness method that took roughness parameters derived from sand grains, which have been reported to be suitable proxies for rough ice crystals. Light scattering data for these geometries was computed using the ADDA discrete dipole approximation method.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 182, October 2016, Pages 225-239
نویسندگان
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