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Journal Article: ID no. (ISBN etc.):  0148-0227 BibTeX citation key:  Rajot2008a
Rajot, J.-L., Formenti, P., Alfaro, S. C., Desboeufs, K., Chevaillier, S., Chatenet, B., Gaudichet, A., Journet, E., Marticorena, B., Triquet, S., Maman, A., Mouget, N. & Zakou, A. (2008) AMMA dust experiment: An overview of measurements performed during the dry season special observation period (SOP0) at the Banizoumbou (Niger) supersite. IN Journal of Geophysical Research - Atmospheres, 113. D00C14.
Added by: Devic 2008-08-21 10:40:41    Last Edited by: Fanny Lefebvre 2011-01-21 11:45:23
 B  
Categories: Aerosol and Chemistry
Keywords: Aerosol, SOP
Creators: Alfaro, Chatenet, Chevaillier, Desboeufs, Formenti, Gaudichet, Journet, Maman, Marticorena, Mouget, Rajot, Triquet, Zakou
Collection: Journal of Geophysical Research - Atmospheres
Bibliographies: Prior150410

Peer reviewed
Number of views:  1137
Popularity index:  60.03%
Maturity index:  accepted

 
Abstract
In the frame of the AMMA SOP0 field campaigns, a sophisticated instrumental set-up specially designed for documenting the characteristics of aerosols in the surface boundary layer has been operated for one month (January 13 - February 13, 2006) at the Banizoumbou supersite in Niger. The analysis of the long-term routine sunphotometer measurements shows that the intensive measurements were performed during a transition phase between a period when biomass burning aerosols are present in the atmospheric column and another when mineral dust are clearly predominant. Based on ground level observations, three types of events can be defined. 1) Type B events corresponding to advection of biomass burning plumes from southern Sahel. They represent only 3% of the measurement period, 2) Type D events during which mineral dust concentrations are larger than 200 μg m-3. They represent 35% of the measuring time, and coincide with advection of mineral dust from distant sources to the measurement site. The composition of the dust differs significantly from one episode to the other, depending on the trajectory of air mass that transported it, and 3) Type events that can be explained by occurrence of local erosion and that are of short duration. During them, the aerosol size distribution is dominated by a coarser mode (9 μm) than during the events of the D type dominated by a finer mode (4.5 μm). Elemental analysis also shows that mineral dust is relatively rich in Fe and poor in.
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Last Edited by: Fanny Lefebvre