Effects of surface roughness with two scales on light scattering by hexagonal ice crystals large compared to the wavelength: DDA results

被引：19

作者：

Collier, C. T. ^{[1
]}

Hesse, E. ^{[1
]}

Taylor, L. ^{[1
]}

Ulanowski, Z. ^{[1
]}

Penttila, A. ^{[2
]}

Nousiainen, T. ^{[3
]}

机构：

[1] Univ Hertfordshire, Ctr Atmospher & Instrumentat Res, Hatfield AL10 9AB, Herts, England

[2] Univ Helsinki, Dept Phys, POB 64, F1-00014 Helsinki, Finland

[3] Finnish Meteorol Inst, FI-00101 Helsinki, Finland

来源：

JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER | 2016年 / 182卷

基金：

芬兰科学院; 英国自然环境研究理事会;

关键词：

Light scattering; Rough ice crystals; Cirrus; DDA; SINGLE-SCATTERING; PARTICLES; BACKSCATTERING; CLOUDS;

D O I：

10.1016/j.jqsrt.2016.06.007

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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. (C) 2016 The Authors. Published by Elsevier Ltd.

引用

页码：225 / 239

页数：15

共 40 条

[1] From the single-scattering properties of ice crystals to climate prediction: A way forward [J].

Baran, Anthony J. .

ATMOSPHERIC RESEARCH, 2012, 112 :45-69

[2] Interference phenomena at backscattering by ice crystals of cirrus clouds [J].

Borovoi, Anatoli ;

Kustova, Natalia ;

Konoshonkin, Alexander .

OPTICS EXPRESS, 2015, 23 (19) :24557-24571

[3] Ice particle habit and surface roughness derived from PARASOL polarization measurements [J].

Cole, B. H. ;

Yang, P. ;

Baum, B. A. ;

Riedi, J. ;

C-Labonnote, L. .

ATMOSPHERIC CHEMISTRY AND PHYSICS, 2014, 14 (07) :3739-3750

[4] A comparison of climate feedbacks in general circulation models [J].

Colman, R .

CLIMATE DYNAMICS, 2003, 20 (7-8) :865-873

[5] Calibration of the cloud particle imager probes using calibration beads and ice crystal analogs: The depth of field [J].

Connolly, Paul J. ;

Flynn, Michael J. ;

Ulanowski, Z. ;

Choularton, T. W. ;

Gallagher, M. W. ;

Bower, K. N. .

JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY, 2007, 24 (11) :1860-1879

[6] Modelling light scattering by absorbing smooth and slightly rough facetted particles [J].

Hesse, E. ;

Collier, C. T. ;

Penttila, A. ;

Nousiainen, T. ;

Ulanowski, Z. ;

Kaye, P. H. .

JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER, 2015, 157 :71-80

[7]

JAMSA S, 1993, ASTRON ASTROPHYS, V271, P319

[8] The impact of surface roughness on scattering by realistically shaped wavelength-scale dust particles [J].

Kemppinen, Osku ;

Nousiainen, Timo ;

Lindqvist, Hannakaisa .

JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER, 2015, 150 :55-67

[9]

LIOU KN, 1999, LIGHT SCATTERING NON, P417

[10] The effective equivalence of geometric irregularity and surface roughness in determining particle single-scattering properties [J].

Liu, Chao ;

Panetta, R. Lee ;

Yang, Ping .

OPTICS EXPRESS, 2014, 22 (19) :23620-23627

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