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

Ronny Engelmann, Albert Ansmann, Stefan Horn, Patric Seifert, Dietrich Althausen, Matthias Tesche, Michael Esselborn, Julia Fruntke, Kirsten Lieke, Volker Freudenthaler, Silke Gross

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    16 Citations (Scopus)


    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.

    Original languageEnglish
    Pages (from-to)448-458
    Number of pages11
    JournalTellus Series B-Chemical and Physical Meteorology
    Issue number4
    Publication statusPublished - 1 Sept 2011


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