Horizon / Plein textes La base de ressources documentaires de l'IRD

IRD

 

Publications des scientifiques de l'IRD

Formenti P., Rajot Jean-Louis, Desboeufs K., Caquineau Sandrine, Chevaillier S., Nava S., Gaudichet A., Journet E., Triquet S., Alfaro S., Chiari M., Haywood J., Coe H., Highwood E. (2008). Regional variability of the composition of mineral dust from western Africa : results from the AMMA SOP0/DABEX and DODO field campaigns - art. no. D00C13. Journal of Geophysical Research - Atmospheres, 113 (D20), ISSN 0148-0227

Lien direct chez l'éditeur doi:10.1029/2008jd009903

Titre
Regional variability of the composition of mineral dust from western Africa : results from the AMMA SOP0/DABEX and DODO field campaigns - art. no. D00C13
Année de publication2008
Type de documentArticle référencé dans le Web of Science WOS:000260393500002
AuteursFormenti P., Rajot Jean-Louis, Desboeufs K., Caquineau Sandrine, Chevaillier S., Nava S., Gaudichet A., Journet E., Triquet S., Alfaro S., Chiari M., Haywood J., Coe H., Highwood E.
SourceJournal of Geophysical Research - Atmospheres, 2008, 113 (D20), ISSN 0148-0227
RésuméThis paper presents data on elemental and mineralogical composition of mineral dust from various source regions of Africa collected during the African Monsoon Multidisciplinary Analyses (AMMA) SOP0/DABEX and Dust Ouflow and Deposition to the Ocean (DODO) DODO1 experiments (January-February 2006), and the DODO2 campaign (August 2006). Bulk filter samples were collected at the AMMA supersite of Banizoumbou, Niger, as well as on board the Facility for Airborne Atmospheric Measurements (FAAM) BAe-146 aircraft. Both mineral dust and biomass burning in external mixing occurred in surface and elevated layers during the winter field phase of the campaign. However, mineral dust was overwhelming, accounting for 72% of the estimated aerosol mass in aged elevated biomass burning layers and up to 93% in plumes of mineral dust, which generally occurred in the boundary layer. A number of well-defined episodes of advection of mineral dust could be identified both at the ground and on the aircraft. The elemental and mineralogical composition varied depending on source region. This variability could be well traced by the calcium content, which is enhanced in dust from North Africa but depleted in dust from the Sahel. Iron oxides in the form of hematite and goethite are enriched in dust emitted within Sahel and in Mauritania, whereas dust from the Bodele depression is iron-oxide depleted. Iron oxides represented between 2.4% and 4.5% of the total estimated dust oxide mass. This regional variability will have to be taken into account in estimating the optical properties of absorption of mineral dust from western Africa.
Plan de classementSciences du milieu [021]
LocalisationFonds IRD ; Niamey
Identifiant IRDPAR00003106
Lien permanenthttp://www.documentation.ird.fr/hor/PAR00003106

Export des données

Disponibilité des documents

Télechargment fichier PDF téléchargeable

Lien sur le Web lien chez l'éditeur

Accès réservé en accès réservé

HAL en libre accès sur HAL


Accès aux documents originaux :

Le FDI est labellisé CollEx

Accès direct

Bureau du chercheur

Site de la documentation

Espace intranet IST (accès réservé)

Suivi des publications IRD (accès réservé)

Mentions légales

Services Horizon

Poser une question

Consulter l'aide en ligne

Déposer une publication (accès réservé)

S'abonner au flux RSS

Voir les tableaux chronologiques et thématiques

Centres de documentation

Bondy

Montpellier (centre IRD)

Montpellier (MSE)

Cayenne

Nouméa

Papeete

Abidjan

Dakar

Niamey

Ouagadougou

Tunis

La Paz

Quito