1 September 2006 Comparison of aerosol size distribution in coastal and oceanic environments
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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.
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Jolanta Kusmierczyk-Michulec, Jolanta Kusmierczyk-Michulec, Alexander M. J. van Eijk, Alexander M. J. van Eijk, } "Comparison of aerosol size distribution in coastal and oceanic environments", Proc. SPIE 6303, Atmospheric Optical Modeling, Measurement, and Simulation II, 63030I (1 September 2006); doi: 10.1117/12.678272; https://doi.org/10.1117/12.678272
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