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20 March 2003 Near-surface aerosol transmission in the marine environment
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An extensive data set of aerosol vertical concentration profiles (height range 0.5-15 meters, diameter range 10-75 micron), acquired with the Rotorod3 device at various geographical locations has been statistically analyzed. The analysis supplied a parameterization for the 4th (large particle) lognormal mode in the Advanced Navy Aerosol Model (ANAM). The analysis revealed a positive correlation between concentration and wind speed, and a negative correlation between concentration and height. No clear dependence of radius and width on meteorological parameters has been found. Numerical simulations with the Dutch-French SeaCluse model supported the results of the statistical analysis. The present version of ANAM predicts the experimental aerosol concentration to within a factor of 3. This result was confirmed using an independent data set. Initial extinction calculations with the ANAM indicate that the addition of the 4th mode changes aerosol extinction values by about 20% as compared to NAM calculations. Closer to the surface, this number is even higher due to the height dependence of the 4th mode.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alexander M. J. van Eijk, Leo H. Cohen, Laurent J. Navarro, and Gerrit de Leeuw "Near-surface aerosol transmission in the marine environment", Proc. SPIE 4884, Optics in Atmospheric Propagation and Adaptive Systems V, (20 March 2003);

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