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Proceedings Paper

Specific marine boundary layer aerosol model
Author(s): Tom B. Low; Norman G. Loeb
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Paper Abstract

A model is described which accepts meteorological input data from marine areas and calculates vertical profiles of size distributions and infrared extinction coefficients in the marine boundary layer under clear sky, fog, and precipitation conditions. For the clear case, aerosols consist of a mixture of dust, water soluble and sea salt particle components represented by the sum of four log-normal size distributions having meteorological and airmass dependent amplitude and modal radius parameters. These were derived by empirical fits to actual ship measurements recorded over the Atlantic Ocean. The calculations account for particle growth using empirical formulations which take particle chemistry into account, while extinction coefficients are determined using Mie theory. Continental component contributions are inferred using a meteorological interpreter model which also corrects for errors or uncertainties in the input meteorological data by ensuring consistency between calculated visibility and observed visibility. Vertical aerosol profiles are modelled considering the production, mixing, and deposition of aerosols in the marine boundary layer, with simpler parameterizations for fog and precipitation cases.

Paper Details

Date Published: 1 August 1992
PDF: 12 pages
Proc. SPIE 1688, Atmospheric Propagation and Remote Sensing, (1 August 1992); doi: 10.1117/12.137875
Show Author Affiliations
Tom B. Low, KelResearch Corp. (Canada)
Norman G. Loeb, KelResearch Corp. (Canada)

Published in SPIE Proceedings Vol. 1688:
Atmospheric Propagation and Remote Sensing
Anton Kohnle; Walter B. Miller, Editor(s)

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