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        Doppler lidar studies of heat island effects on vertical mixing of aerosols during SAMUM-2

        Author
        Engelmann, Ronny
        Ansmann, Albert
        Horn, Stefan
        Seifert, Patric
        Althausen, Dietrich
        Tesche, Matthias
        Esselborn, Michael
        Fruntke, Julia
        Lieke, Kirsten
        Freudenthaler, Volker
        Gross, Silke
        Attention
        2299/16223
        Abstract
        A wind Doppler lidar was deployed next to three aerosol lidars during the SAMUM-2 campaign on the main island of Cape Verde. The effects of the differential heating of the island and the surrounding ocean and the orographic impact of the capital island Santiago and the small island on its luv side, Maio, are investigated. Horizontal and vertical winds were measured in the disturbed maritime boundary layer and compared to local radiosoundings. Lidar measurements from the research aircraft Falcon and a 3-D Large Eddy Simulation (LES) model were used in addition to study the heating effects on the scale of the islands. Indications are found that these effects can widely control the downward mixing from greater heights to the surface of African aerosols, mainly Saharan dust and biomass-burning smoke, which were detected in a complex layering over the Cape Verde region.
        Publication date
        2011-09-01
        Published in
        Tellus Series B-Chemical and Physical Meteorology
        Published version
        https://doi.org/10.1111/j.1600-0889.2011.00552.x
        Other links
        http://hdl.handle.net/2299/16223
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