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| Titel |
Characteristics and sources of carbonaceous aerosols from Shanghai, China |
| VerfasserIn |
J.-J. Cao, C.-S. Zhu, X.-X. Tie, F.-H. Geng, H.-M. Xu, S. S. H. Ho, G.-H. Wang, Y.-M. Han, K.-F. Ho |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 2 ; Nr. 13, no. 2 (2013-01-22), S.803-817 |
| Datensatznummer |
250017602
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| Publikation (Nr.) |
 copernicus.org/acp-13-803-2013.pdf |
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| Zusammenfassung |
| An intensive investigation of carbonaceous PM2.5 and TSP (total suspended particles) from Pudong
(China) was conducted as part of the MIRAGE-Shanghai (Megacities Impact on Regional and Global Environment) experiment in 2009.
Data for organic and elemental carbon (OC and EC), organic species,
including C17 to C40 n-alkanes and 17 polycyclic aromatic hydrocarbons
(PAHs), and stable carbon isotopes OC (δ13COC) and EC
(δ13CEC) were used to evaluate the aerosols' temporal variations
and identify presumptive sources. High OC/EC ratios indicated a large
fraction of secondary organic aerosol (SOA); high char/soot ratios indicated
stronger contributions to EC from motor vehicles and coal combustion than
biomass burning. Diagnostic ratios of PAHs indicated that much of the SOA
was produced via coal combustion. Isotope abundances
(δ13COC = −24.5 ± 0.8‰ and
δ13CEC = −25.1 ± 0.6‰) indicated that
fossil fuels were the most important source for carbonaceous PM2.5 (particulate matter less than 2.5 micrometers in diameter),
with lesser impacts from biomass burning and natural sources. An EC tracer
system and isotope mass balance calculations showed that the relative
contributions to total carbon from coal combustion, motor vehicle exhaust,
and SOA were 41%, 21%, and 31%; other primary sources such as
marine, soil and biogenic emissions contributed 7%. Combined analyses of
OC and EC, n-alkanes and PAHs, and stable carbon isotopes provide a new way
to apportion the sources of carbonaceous particles. |
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