An analytical model for the altitude variation of aerosol number densities in the coastal atmospheric boundary layer |
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| Institution: | 1. Soil Physics & Land Management Group, Wageningen University & Research Centre, P.O. Box 47, 6700 AA Wageningen, The Netherlands;2. Department of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, 3001 Heverlee, Belgium;3. Alterra, Wageningen University & Research Centre, P.O. Box 47, 6700 AA Wageningen, The Netherlands;4. Natuurcentrum Ameland, P.O. Box 60, 9163 ZM Nes Ameland, The Netherlands;1. Department of Civil and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea;3. BRAC Clinic, Dhaka, Bangladesh |
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| Abstract: | A simplified one dimensional analytical model to describe the altitude variation of aerosol number densities in the atmospheric boundary layer during clear sky and calm/moderate wind conditions, over a plane terrain on the tropical seacoast, is developed. The analytical model is mainly defined by two parameters, the aerosol mixing height and the exponential rate of decrease above the mixing height. The effect of surface impaction is also taken into account in this model. It is seen that this parameter varies with season. By matching the analytical profile with the observed mean profile in each month, the surface source strength has been estimated. The seasonal and inter-annual variations of this parameter are studied. |
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