Near-surface aerosol transmission in the marine environment

Alexander M. J. van Eijk; Leo H. Cohen; Laurent J. Navarro; Gerrit de Leeuw

doi:10.1117/12.462497

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20 March 2003 Near-surface aerosol transmission in the marine environment

Alexander M. J. van Eijk, Leo H. Cohen, Laurent J. Navarro, Gerrit de Leeuw

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Proceedings Volume 4884, Optics in Atmospheric Propagation and Adaptive Systems V; (2003) https://doi.org/10.1117/12.462497
Event: International Symposium on Remote Sensing, 2002, Crete, Greece

Abstract

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 4^th (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 4^th 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 4^th mode.

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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); https://doi.org/10.1117/12.462497

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