Near-surface aerosol transmission in the marine environment
conference paper
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.
Topics
TNO Identifier
95535
Publisher
SPIE - The International Society for Optical Engineering
Source title
Optics in atmospheric propagation and adaptive systems V. Proceedings of a conference held 24-27 Sep 2002, Agia Pelagia, Crete, Greece
Editor(s)
Kohnle, A.
Gonglewski, J.D.
Gonglewski, J.D.
Place of publication
Bellingham, WA
Pages
160-165