Titre :

Simulation of African dust properties and radiative effects during the 2015 SHADOW campaign in Senegal

Auteur(s) :

Pere, Jean-Christophe [Auteur]
Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518
Rivellini, L. [Auteur]
Laboratoire d’Optique Atmosphérique - UMR 8518 [LOA]
Crumeyrolle, Suzanne [Auteur]
Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518
Chiapello, Isabelle [Auteur]
Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518
Minvielle, Fanny [Auteur]
Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518
Thieuleux, Francois [Auteur]
Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518
Choël, Marie [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Popovici, Ioana-Elisabeta [Auteur]
Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518

Titre de la revue :

Atmospheric Research

Numéro :

199

Pagination :

14-28

Date de publication :

2018-01

Discipline(s) HAL :

Chimie/Chimie théorique et/ou physique

Résumé en anglais : [en]

The aim of this work is to estimate optical and radiative properties of dust aerosols and their potential feedbacks on atmospheric properties over Western Africa for the period 20 March–28 April 2015, by using numerical ...
Lire la suite >The aim of this work is to estimate optical and radiative properties of dust aerosols and their potential feedbacks on atmospheric properties over Western Africa for the period 20 March–28 April 2015, by using numerical simulations and different sets of remote-sensing and in-situ measurements. Comparisons of simulations made by the on-line coupled meteorological-chemistry model WRF-CHEM with MODIS, AERONET and in-situ observations result in a general agreement for the spatio-temporal variations of aerosol extinction at both local and regional scales. Simulated SSA reached elevated values between 0.88 and 0.96 along the visible/near-infrared in close agreement with AERONET inversions, suggesting the predominance of dust over Western Africa during this specific period. This predominance of dust is confirmed by in-situ measurements of the aerosol size distribution, fitting well with the aerosols size distribution simulated by WRF-CHEM. The impact of this large dust load on the radiative fluxes leads to large modifications of the shortwave and longwave radiative budget both at the ground and at the top of the atmosphere. In return, the response of the atmosphere to these dust-induced radiative changes is the alteration of the surface air temperature and wind fields, with non-negligible impact on the dust emission and transport.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

CNRS
ENSCL
Université de Lille

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
• Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518

Équipe(s) de recherche :

Physicochimie de l’Environnement (PCE)

Date de dépôt :

2021-11-16T08:23:31Z
2024-02-21T08:41:04Z
2024-02-21T08:54:16Z