Changes of Marine Aerosol Properties over the South Yellow Sea Using Single Particle Aerosol Mass Spectrometer

GUO Xiaoshuang1, LI Xiaoying1, YAN Caiqing1, FU Huaiyu1,2, GAO Huiwang3, YAO Xiaohong3, GUO Zhigang2, ZHENG Mei1,†

ACTA Scientiarum Naturalium Universitatis Pekinensis - - News -

1. State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871; 2. Department of Environmental Science and Engineering, Fudan University, Shanghai 200433; 3. Key Laboratory of Marine Environment and Ecology (MOE), College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100; † Corresponding author, E-mail: mzheng@pku.edu.cn

Abstract To better understand the variation properties of marine aerosol during transport, single particle aerosol mass spectrometer (SPAMS) was applied for the first time during a comprehensive ocean experiment over the South Yellow Sea in November 2012. Two parallel sections influenced by marine air masses with constant wind direction from ocean to land (Section 1), and continental air masses with constant wind direction from land to ocean (Section 2), respectively, were selected to study the variation of chemical characteristics of marine aerosol. The results showed that the average particle count in Section 2 was around 3.5 times higher than that in Section 1, which might be ascribed to the influence of continental air masses, accompanied with high wind speed in Section 2. Particle counts of major components (SO42−, NO3−, NH4+, OC and EC) containing particles in Section 1 and Section 2 (excluding NO3−) gradually decreased by 58%74% and 34%53%, and the reductions in Section 1 were greater than that in Section 2. Secondary aerosol contributed to the highest fraction (42%) of the total particles in Section 2, while sea-salt aerosol contributed to the highest (>30%) in Section 1. The contribution of secondary and other anthropogenic aerosols (including biomass burning, Soot-like and Pb-containing aerosols) in both sections were

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