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    Original Research Papers

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

    Authors:

    Ronny Engelmann ,

    Leibniz Institute for Tropospheric Research, DE
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    Albert Ansmann,

    Leibniz Institute for Tropospheric Research, DE
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    Stefan Horn,

    Leibniz Institute for Tropospheric Research, DE
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    Patric Seifert,

    Leibniz Institute for Tropospheric Research, DE
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    Dietrich Althausen,

    Leibniz Institute for Tropospheric Research, DE
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    Matthias Tesche,

    Leibniz Institute for Tropospheric Research, DE
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    Michael Esselborn,

    European Southern Observatory (ESO), DE
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    Julia Fruntke,

    German Meteorological Service, Regional- und Seewetterzentrale Hamburg, DE
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    Kirsten Lieke,

    Institute for Applied Geosciences, Technical University Darmstadt, DE
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    Volker Freudenthaler,

    Meteorological Institute, Ludwig-Maximilians-Universität, DE
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    Silke Gross

    Meteorological Institute, Ludwig-Maximilians-Universität, DE
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    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.

    How to Cite: Engelmann, R., Ansmann, A., Horn, S., Seifert, P., Althausen, D., Tesche, M., Esselborn, M., Fruntke, J., Lieke, K., Freudenthaler, V. and Gross, S., 2011. Doppler lidar studies of heat island effects on vertical mixing of aerosols during SAMUM–2. Tellus B: Chemical and Physical Meteorology, 63(4), pp.448–458. DOI: http://doi.org/10.1111/j.1600-0889.2011.00552.x
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      Published on 01 Jan 2011
    Peer Reviewed
     CC BY 4.0
     Accepted on 12 May 2011            Submitted on 23 Nov 2010

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