Atmospheric Chemistry and Physics Discussions www.atmos-chem-phys-discuss.net 1680-7367 1680-7375 9 3 2009 10.5194/acpd-9-13655-2009 http://www.atmos-chem-phys-discuss.net/9/13655/2009/ http://www.atmos-chem-phys-discuss.net/9/13655/2009/acpd-9-13655-2009.html http://www.atmos-chem-phys-discuss.net/9/13655/2009/acpd-9-13655-2009.pdf 13655 13691 2009-06-22 Elevated nitrogen-containing particles observed in Asian dust aerosol samples collected at the marine boundary layer of the Bohai Sea and the Yellow Sea H. Geng Y.-M. Park H.-J. Hwang S. Kang C.-U. Ro curo@inha.ac.kr Department of Chemistry, Inha University, Incheon, 402-751, Korea Korea Polar Research Institute, Incheon, 406-840, Korea Low-<i>Z</i> particle electron probe X-ray microanalysis (low-<i>Z</i> particle EPMA) shows powerful advantages for the characterization of ambient particulate matter in environmental and geological applications. By the application of the low-<i>Z</i> particle EPMA single particle analysis, an overall examination of 1800 coarse and fine particles (aerodynamic diameters: 2.5–10 &mu;m and 1.0–2.5 &mu;m, respectively) in six samples collected on 28 April–1 May 2006 in the marine boundary layer (MBL) of the Bohai Sea and Yellow Sea was conducted. Three samples (D1, D2, and D3) were collected along the Bohai Bay, Bohai Straits, and Yellow Sea near Korea during an Asian dust storm event while the other three samples (N3, N2, and N1) were collected on normal days. Based on X-ray spectral and secondary electron image data, 15 different types of particles were identified, in which soil-derived particles were encountered with the largest frequency, followed by (C, N, O)-rich droplets (likely the mixture of organic matter and NH₄NO₃), particles of marine origin, and carbonaceous, Fe-rich, fly ash, and (C, N, O, S)-rich droplet particles. 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