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Titolo:
Semi-empirical model of absorption and scattering by isotropic fractal aggregates of spheres
Autore:
Rannou, P; McKay, CP; Botet, R; Cabane, M;
Indirizzi:
Univ Paris 06, Serv Aeron, F-75252 Paris, France Univ Paris 06 Paris France F-75252 06, Serv Aeron, F-75252 Paris, France NASA, Ames Res Ctr, Moffett Field, CA 94035 USA NASA Moffett Field CA USA94035 Ames Res Ctr, Moffett Field, CA 94035 USA Univ Paris 11, Phys Solides Lab, F-91405 Orsay, France Univ Paris 11 Orsay France F-91405 ys Solides Lab, F-91405 Orsay, France
Titolo Testata:
PLANETARY AND SPACE SCIENCE
fascicolo: 3-4, volume: 47, anno: 1999,
pagine: 385 - 396
SICI:
0032-0633(199903/04)47:3-4<385:SMOAAS>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
LIGHT-SCATTERING; ATMOSPHERE; TITAN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: Rannou, P Univ Paris 06, Serv Aeron, 4 Pl Jussieu,B102, F-75252 Paris, France Univ Paris 06 4 Pl Jussieu,B102 Paris France F-75252 is, France
Citazione:
P. Rannou et al., "Semi-empirical model of absorption and scattering by isotropic fractal aggregates of spheres", PLANET SPAC, 47(3-4), 1999, pp. 385-396

Abstract

Existing models of scattering by fractal aggregates of spheres are generally accurate but somewhat complicated and lime consuming. Therefore, they are not easily usable for atmospheric studies that need intensive computations. We propose here a simple and fast model, based on Mie scattering and a set of empirical rules: that determines the scattering and absorption cross sections as well as the intensity phase function of isotropic fractal aggregates of identical spheres. This model is 10-50 times faster than the mean field model it is based on, and is easily derivable from a regular Mie code. The parameters of the present model are optimized for values of the real refractive index between 1.2 and 2.2, for imaginary refractive index less than 1 and for the product of real refractive index and spherical size parameter less than 10. This range was chosen as representative of typical particles in planetary atmospheres, for example, Titan's aerosols. (C) 1999 Elsevier Science Ltd. All rights reserved.

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Documento generato il 27/09/20 alle ore 22:51:46