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Modeling optical properties of particles with small-scale surface roughness: combination of group theory with a perturbation approach

Kahnert, Michael and Rother, Tom (2011) Modeling optical properties of particles with small-scale surface roughness: combination of group theory with a perturbation approach. Optics Express, 19 (12), pp. 11138-11151.

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Abstract

A T-matrix method for scattering by particles with small-scale surface roughness is presented. The method combines group theory with a perturbation expansion approach. Group theory is found to reduce CPU-time by 4-6 orders of magnitude. The perturbation expansion extends the range of size parameters by a factor of 5 compared to non-perturbative methods. An application to optically hard particles shows that small-scale surface roughness changes scattering in side- and backscattering directions, and it impacts the single-scattering albedo. This can have important implications for interpreting remote sensing observations, and for the climate impact of mineral aerosols.

Document Type:Article
Title:Modeling optical properties of particles with small-scale surface roughness: combination of group theory with a perturbation approach
Authors:
AuthorsInstitution or Email of Authors
Kahnert, MichaelNorwegian Institute for Air Research
Rother, TomInstitut für Methodik der Fernerkundung
Date:2011
Journal or Publication Title:Optics Express
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:19
Page Range:pp. 11138-11151
Status:Published
Keywords:light scattering, group theory, perturbation approach
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Entwicklung von Atmosphärenprozessoren
Location: Neustrelitz
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Dr.rer.nat. Tom Rother
Deposited On:18 Jan 2012 11:29
Last Modified:12 Dec 2013 21:34

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