The chemical composition of aerosol particles (Dp 1.5 µm) was measured over the southeast Pacific Ocean during the VAMOS (Variability of the American Monsoon Systems) Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-Rex) between 16 October and 15 November 2008 using the US Department of Energy (DOE) G-1 aircraft. The objective of these flights was to gain an understanding of the sources and evolution of these aerosols, and of how they interact with the marine stratus cloud layer that prevails in this region of the globe. Our measurements showed that the marine boundary layer (MBL) aerosol mass was dominated by non-sea-salt SO2-4, followed by Na+, Cl-, Org (total organics), NH+4 , and NO-3 , in decreasing order of importance; CH3SO-3 (MSA), Ca2+, and K+ rarely exceeded their limits of detection. Aerosols were strongly acidic with a NH+4 to SO2-4 equivalents ratio typically
Revised: September 29, 2014 |
Published: May 23, 2014
Citation
Lee Y.N., S. Springston, J.T. Jayne, J. Wang, J.M. Hubbe, G.I. Senum, and L.I. Kleinman, et al. 2014.Chemical Composition and Sources of Coastal Marine Aerosol Particles during the 2008 VOCALS-REx Campaign.Atmospheric Chemistry and Physics 14, no. 10:5057–5072.PNNL-SA-104189.doi:10.5194/acp-14-5057-2014