Title :

Lidar cross-sections of soot fractal aggregates: assessment of equivalent-sphere models

Author(s) :

Ceolato, Romain [Auteur]
DOTA, ONERA, Université de Toulouse [Toulouse]
Gaudfrin, Florian [Auteur]
LEUKOS
DOTA, ONERA, Université de Toulouse [Toulouse]
Pujol, Olivier [Auteur]
Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518
Riviere, Nicolas [Auteur]
DOTA, ONERA, Université de Toulouse [Toulouse]
Berg, Matthew J. [Auteur]
Kansas State University
Sorensen, Christopher M. [Auteur]
Kansas State University

Journal title :

Journal of Quantitative Spectroscopy and Radiative Transfer

Abbreviated title :

J. Quant. Spectrosc. Radiat. Transf.

Volume number :

212

Publication date :

2018-06-01

ISSN :

0022-4073

English keyword(s) :

Lidar
Cross-sections
Equivalent spherical model
Equivalent-sphere approximation
Light-scattering
Soot fractal aggregates

HAL domain(s) :

Physique [physics]

English abstract : [en]

This work assesses the ability of equivalent-sphere models to reproduce the optical properties of soot aggregates relevant for lidar remote sensing, i.e. the backscattering and extinction cross sections. Lidar cross-sections ...
Show more >This work assesses the ability of equivalent-sphere models to reproduce the optical properties of soot aggregates relevant for lidar remote sensing, i.e. the backscattering and extinction cross sections. Lidar cross-sections are computed with a spectral discrete dipole approximation model over the visible-to-infrared (40 0-50 0 0 nm) spectrum and compared with equivalent-sphere approximations. It is shown that the equivalent-sphere approximation, applied to fractal aggregates, has a limited ability to calculate such cross-sections well. The approximation should thus be used with caution for the computation of broad-band lidar cross-sections, especially backscattering, at small and intermediate wavelengths (e.g. UV to visible).Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

CNRS
Université de Lille

Collections :

• Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518

Submission date :

2024-01-30T11:45:56Z
2024-02-19T14:39:27Z