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Title: Saharan dust transport and deposition towards the tropicalnorthern Atlantic
Authors: Schepanski, K.Tegen, I.MacKe, A.
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Issue Date: 2009
Published in: Atmospheric Chemistry and Physics Vol. 9 (2009), No. 4
Publisher: Göttingen : Copernicus
Abstract: We present a study of Saharan dust export towards the tropical North Atlantic using the regional dust emission, transport and deposition model LM-MUSCAT. Horizontal and vertical distribution of dust optical thickness, concentration, and dry and wet deposition rates are used to describe seasonality of dust export and deposition towards the eastern Atlantic for three typical months in different seasons. Deposition rates strongly depend on the vertical dust distribution, which differs with seasons. Furthermore the contribution of dust originating from the Bod́eĺe Depression to Saharan dust over the Atlantic is investigated. A maximum contribution of Bod́eĺe dust transported towards the Cape Verde Islands is evident in winter when the Bod́eĺe source area is most active and dominant with regard to activation frequency and dust emission. Limitations of using satellite retrievals to estimate dust deposition are highlighted.
Keywords: aerosol property; atmospheric deposition; atmospheric transport; dust; numerical model; optical depth; particulate flux; suspended particulate matter; vertical distribution; Atlantic Ocean; Atlantic Ocean (North); Cape Verde
DDC: 550
License: CC BY 3.0 Unported
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