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Title: Doppler lidar studies of heat island effects on vertical mixing of aerosols during SAMUM-2
Authors: Engelmann, RonnyAnsmann, AlbertHorn, StefanSeifert, PatricAlthausen, DietrichTesche, MatthiasEsselborn, MichaelFruntke, JuliaLieke, KirstenFreudenthaler, VolkerGross, Silke
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Issue Date: 2017
Published in: Tellus B: Chemical and Physical Meteorology , Volume 63, Issue 4, Page 448-458
Publisher: Milton Park : Taylor & Francis
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.
Keywords: aerosol; atmospheric modeling; biomass burning; boundary layer; computer simulation; Doppler lidar; dust; heat island; large eddy simulation; orographic effect; small island state; vertical mixing
DDC: 550
License: CC BY 4.0 Unported
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