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Atmosphere 2017, 8(2), 33; doi:10.3390/atmos8020033

Temporal Variability of Source-Specific Solvent-Extractable Organic Compounds in Coastal Aerosols over Xiamen, China

1
Key Laboratory of Global Change and Marine-Atmospheric Chemistry of State Oceanic Administration (SOA), Third Institute of Oceanography, State Oceanic Administration (SOA), Xiamen 361005, China
2
College of Ocean and Earth Sciences, Xiamen University, Xiamen 361008, China
3
Laboratory of Marine and Coastal Geology, Third Institute of Oceanography, State Oceanic Administration (SOA), Xiamen 361005, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Robert W. Talbot
Received: 21 November 2016 / Revised: 21 January 2017 / Accepted: 4 February 2017 / Published: 8 February 2017
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Abstract

This study describes an analysis of ambient aerosols in a southeastern coastal city of China (Xiamen) in order to assess the temporal variability in the concentrations and sources of organic aerosols (OA). Molecular-level measurements based on a series of solvent extractable lipid compounds reveal inherent heterogeneity in OA, in which the concentration and relative contribution of at least three distinct components (terrestrial plant wax derived, marine/microbial and fossil fuel derived organic matter (OM)) exhibited distinct and systematic temporal variability. Plant wax lipids and associated terrestrial OM are influenced by seasonal variability in plant growth; marine/microbial lipids and associated marine OM are modulated by sea spill and temperature change, whereas fossil fuel derived OM reflects the anthropogenic utilization of fossil fuels originated from petroleum-derived sources and its temporal variation is strongly controlled by meteorological conditions (e.g., the thermal inversion layer), which is analogous to other air organic pollutions. A comparative study among different coastal cities was applied to estimate the supply of different sources of OM to ambient aerosols in different regions, where it was found that biogenic OM in aerosols over Xiamen was much lower than that of other cities; however, petroleum-derived OM exhibited a high level of contribution with a higher concentration of unresolved complex matters (UCM) and higher a ratio between UCM and resolved alkanes (UCM/R). View Full-Text
Keywords: temporal variability; organic aerosols (OA); source-specific lipids; marine and microbial OM; plant wax OM; fossil fuel-derived OM; coastal cities; Xiamen temporal variability; organic aerosols (OA); source-specific lipids; marine and microbial OM; plant wax OM; fossil fuel-derived OM; coastal cities; Xiamen
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Tao, S.; Yin, X.; Jiao, L.; Zhao, S.; Chen, L. Temporal Variability of Source-Specific Solvent-Extractable Organic Compounds in Coastal Aerosols over Xiamen, China. Atmosphere 2017, 8, 33.

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