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Journal Article: ID no. (ISBN etc.):  0148-0227 BibTeX citation key:  Formenti2008a
Formenti, P., Rajot, J.-L., Desboeufs, K., Caquineau, S., Chevaillier, S., Nava, S., Gaudichet, A., Journet, E., Triquet, S., Alfaro, S. C., Chiari, M., Haywood, J. M., Coe, H. & Highwood, E. J. (2008) Regional variability of the composition of mineral dust from Western Africa: results from the AMMA SOP0/DABEX and DODO. IN Journal of Geophysical Research - Atmospheres, 113. D00C13.
Added by: Devic 2008-08-21 15:15:23    Last Edited by: Fanny Lefebvre 2011-01-21 11:19:44
 B  
Categories: Aerosol and Chemistry
Keywords: SOP
Creators: Alfaro, Caquineau, Chevaillier, Chiari, Coe, Desboeufs, Formenti, Gaudichet, Haywood, Highwood, Journet, Nava, Rajot, Triquet
Collection: Journal of Geophysical Research - Atmospheres
Bibliographies: Prior150410

Peer reviewed
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Popularity index:  61.11%
Maturity index:  published

 
Abstract
This paper presents data on elemental and mineralogical composition of mineral dust from various source regions of Africa collected during the AMMA SOP0/DABEX and 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 onboard 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 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 Bodélé 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.
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Last Edited by: Fanny Lefebvre