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Comparison of aerosol size distribution in coastal and oceanic environments
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Paper Abstract

The results of applying the empirical orthogonal functions (EOF) method to decomposition and approximation of aerosol size distributions are presented. A comparison was made for two aerosol data sets, representing coastal and oceanic environments. The first data set includes measurements collected at the Irish Atlantic coast in 1994 and 1995, the second one data collected during the Rough Evaporation Duct (RED) experiment that took place off Oahu, Hawaii in 2001. The main finding is that aerosol size distributions can be represented by a superposition of the mean size distribution and the first eigenvector multiplied by an amplitude function. For the two aerosol data sets the mean size distribution is very similar in the range of small particles sizes (radius < 1μm) but the main difference appears for larger aerosols (radius > 1μm). It is also reflected by the spectral shape of the eigenvector. The differences can be related to the type of aerosols present at both locations, and the amplitude function can be associated to meteorological conditions. The amplitude function also indicates the episodes with the maximum/minimum continental influence. The results of this analysis will be used in upgrades of the ANAM model.

Paper Details

Date Published: 1 September 2006
PDF: 12 pages
Proc. SPIE 6303, Atmospheric Optical Modeling, Measurement, and Simulation II, 63030I (1 September 2006); doi: 10.1117/12.678272
Show Author Affiliations
Jolanta Kusmierczyk-Michulec, TNO Defense, Safety, and Security (Netherlands)
Alexander M. J. van Eijk, TNO Defense, Safety, and Security (Netherlands)

Published in SPIE Proceedings Vol. 6303:
Atmospheric Optical Modeling, Measurement, and Simulation II
Stephen M. Hammel; Anton Kohnle, Editor(s)

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