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Light scattering by the Martian dust analog, palagonite, modeled with ellipsoids

S. Merikallio ; T. Nousiainen ; Michael Kahnert (Institutionen för rymd- och geovetenskap, Global miljömätteknik och modellering) ; A. M. Harri
Optics Express (1094-4087). Vol. 21 (2013), 15, p. 17972-17985.
[Artikel, refereegranskad vetenskaplig]

We have investigated the suitability of the ellipsoidal model particles to mimic scattering by Martian dust particles by comparing simulations against laboratory data for palagonite, a Mars analog sample. By optimizing the shape distribution of ellipsoids, a very good match with a laboratory-measured scattering matrix was obtained. Even an equiprobable distribution of ellipsoids performed well. The asymmetry parameter and single-scattering albedo were found to depend on the assumed shape distribution as much as on the typical uncertainties associated with refractive indices and size, suggesting that shape is an important parameter that potentially influences remote retrievals of dust particle properties.

Nyckelord: optical-properties, particles, atmosphere, spheroids



Denna post skapades 2013-09-23. Senast ändrad 2014-10-13.
CPL Pubid: 183832

 

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Projekt

Denna publikation är ett resultat av följande projekt:


Aerosol Optics in Global Earth System Modelling (AGES) (VR//2011-3346)