1. Repositorio institucional de CLACSO
2. Colección de los Centros Asociados
3. Francia
4. Institut de Recherche pour le Développement - IRD - Cosecha

Título :	Wet deposition fluxes of mineral dust and their relation with cold pools in the Central Sahel
Descripción :	Based on a large number of in-situ measurements performed over a 9-years period in two Sahelian stations, we investigate the drivers of the dust wet deposition in relation to the meteorological situations and the PM10 (Particulate Matter with diameter lower than 10 mu m) surface concentrations. Precipitation associated with cold pools (CP) contribute to more than 90% of the precipitation amount associated with the collected wet deposition samples. The wet deposition events associated with these CP control by far the wet deposition, that is, 66% and 81%, depending on the station. The dust washout ratios (WR) corresponding to the most convective events under high level of dust concentrations were found to be in the range of 319-766 while WR of other kind of events are depending on the dilution effect. This range of value are in the lower range of WR previously estimated and used in dust modeling studies (200-2000). Plain Language Summary Mineral dust emitted in the atmosphere by wind erosion in arid and semi-arid areas have environmental impacts on the climate, human health and on bio-geochemical cycles. The atmospheric concentrations are controlled by both emission and deposition processes. In this study, we focus on the study of wet deposition of mineral dust in the Sahel semi-arid region. Long-term (9 years) measurements of dust concentrations, wet dust deposition and meteorological parameters in two Sahelian station of the INDAAF network (International Network to study Deposition and Atmospheric chemistry in Africa) are presented. Based on this data set, we investigated the cold pool meteorological situation associated to wet deposition of mineral dust.
URI :	http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/169133
Otros identificadores :	https://www.documentation.ird.fr/hor/fdi:010084393 oai:ird.fr:fdi:010084393 Audoux T., Laurent B., Marticorena B., Bergametti G., Rajot Jean-Louis, Feron A., Gaimoz C.. Wet deposition fluxes of mineral dust and their relation with cold pools in the Central Sahel. 2022, 49 (4), p. e2021GL095005 [10 p.]
Aparece en las colecciones:	Institut de Recherche pour le Développement - IRD - Cosecha

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