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Modeling optical properties of particles with small-scale surface roughness: combination of group theory with a perturbation approach
SMHI, Research Department, Air quality.ORCID iD: 0000-0001-5695-1356
2011 (English)In: Optics Express, ISSN 1094-4087, Vol. 19, no 12, 11138-11151 p.Article in journal (Refereed) Published
Abstract [en]

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. (C) 2011 Optical Society of America

Place, publisher, year, edition, pages
2011. Vol. 19, no 12, 11138-11151 p.
National Category
Meteorology and Atmospheric Sciences
Research subject
Environment
Identifiers
URN: urn:nbn:se:smhi:diva-519DOI: 10.1364/OE.19.011138ISI: 000292865500014PubMedID: 21716343OAI: oai:DiVA.org:smhi-519DiVA: diva2:806036
Available from: 2015-04-17 Created: 2015-04-15 Last updated: 2015-04-17Bibliographically approved

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