open access

https://hdl.handle.net/2115/26171

High loadings and source strengths of organic aerosols in China

英語

molecular compositions

2006-11-17

American Geophysical Union

Geophysical Research Letters

33

L22801

Nation-wide studies of organic aerosols were conducted on a molecular level in 15 Chinese cities. The results showed strikingly high levels of organic compounds (e.g., annual concentrations of polycyclic aromatic hydrocarbons, phthalates, sugars and diacids are 110, 370, 400 and 830 ng m−3, respectively), especially in the mid-west region during winter (up to 125 μg m−3 organic carbon). Fossil fuel combustion and/or biomass burning products are 3−30 times more abundant in winter than in summer. In contrast, significant quantity of phthalates (168−2200 ng m−3) was detected in summer. Concentrations of the pollutants are generally 1−3 orders of magnitude higher than those in developed countries. Their source strengths are characterized in winter by fossil fuel combustion, followed by secondary oxidation, plant wax emissions and biomass burning, whereas in summer by secondary oxidation, followed by fossil fuel combustion and plastic emissions.

学術雑誌論文

Accepted Manuscript

An edited version of this paper was published by AGU. Copyright 2006, American Geophysical Union, GEOPHYSICAL RESEARCH LETTERS, 33.

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