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dc.contributor.authorKnippertz, Peter
dc.contributor.authorTesche, Matthias
dc.contributor.authorHeinold, Bernd
dc.contributor.authorKandler, Konrad
dc.contributor.authorToledano, Carlos
dc.contributor.authorEsselborn, Michael
dc.identifier.citationKnippertz , P , Tesche , M , Heinold , B , Kandler , K , Toledano , C & Esselborn , M 2011 , ' Dust mobilization and aerosol transport from West Africa to Cape Verde-a meteorological overview of SAMUM-2 ' , Tellus Series B-Chemical and Physical Meteorology , vol. 63 , no. 4 , pp. 430-447 .
dc.identifier.otherPURE: 8758628
dc.identifier.otherPURE UUID: 98a29fed-d1ee-431e-89af-47a7cfacda11
dc.identifier.otherScopus: 80051956785
dc.description.abstractThe second field campaign of the SAharan Mineral dUst experiMent (SAMUM-2) was performed between 15 January and 14 February 2008 at the airport of Praia, Cape Verde, and provided valuable information to study the westward transport of Saharan dust and the mixing with biomass-burning smoke and sea-salt aerosol. Here lidar, meteorological, and particle measurements at Praia, together with operational analyses, trajectories, and satellite and synoptic station data are used to give an overview of the meteorological conditions and to place other SAMUM-2 measurements into a large-scale context. It is demonstrated that wintertime dust conditions at Cape Verde are closely related to the movement and intensification of mid-latitude high-pressure systems and the associated pressure gradients at their southern flanks. These cause dust emission over Mauritania, Mali, and Niger, and subsequent westward transport to Cape Verde within about 1-5 d. Dust emissions often peak around midday, suggesting a relation to daytime mixing of momentum from nocturnal low-level jets to the surface. The dust layer over Cape Verde is usually restricted to the lowest 1.5 km of the atmosphere. During periods with near-surface wind speeds about 5.5 ms-1, a maritime aerosol layer develops which often mixes with dust from above. On most days, the middle levels up to about 5 km additionally contain smoke that can be traced back to sources in southern West Africa. Above this layer, clean air masses are transported to Cape Verde with the westerly flow at the southern side of the subtropical jet. The penetration of extra-tropical disturbances to low latitudes can bring troposphere-deep westerly flow and unusually clean conditions to the region.en
dc.relation.ispartofTellus Series B-Chemical and Physical Meteorology
dc.subjectAtmospheric Science
dc.titleDust mobilization and aerosol transport from West Africa to Cape Verde-a meteorological overview of SAMUM-2en
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
rioxxterms.typeJournal Article/Review

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