Physics
Scientific paper
Nov 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3322801w&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 22, CiteID L22801
Physics
10
Atmospheric Composition And Structure: Constituent Sources And Sinks, Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Atmospheric Composition And Structure: Geochemical Cycles (1030)
Scientific paper
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.
Cao Junji
Ho Kinfai
Kawamura Kimitaka
Lee Shuncheng
Wang Gehui
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