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| Titel |
Springtime carbon emission episodes at the Gosan background site revealed by total carbon, stable carbon isotopic composition, and thermal characteristics of carbonaceous particles |
| VerfasserIn |
J. Jung, K. Kawamura |
| 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 ; 11, no. 21 ; Nr. 11, no. 21 (2011-11-03), S.10911-10928 |
| Datensatznummer |
250010166
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| Publikation (Nr.) |
 copernicus.org/acp-11-10911-2011.pdf |
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| Zusammenfassung |
| In order to investigate the emission of carbonaceous aerosols at the Gosan
background super-site (33.17° N, 126.10° E) in East Asia, total
suspended particles (TSP) were collected during spring of 2007 and 2008 and
analyzed for particulate organic carbon, elemental carbon, total carbon
(TC), total nitrogen (TN), and stable carbon isotopic composition (δ13C)
of TC. The stable carbon isotopic composition of TC (δ13CTC)
was found to be lowest during pollen emission episodes
(range: −26.2‰ to −23.5‰, avg. −25.2 ± 0.9‰), approaching those
of the airborne pollen (−28.0‰) collected at the Gosan site. Based on a
carbon isotope mass balance equation, we found that ~42% of TC in
the TSP samples during the pollen episodes was attributed to airborne pollen
from Japanese cedar trees planted around tangerine farms in Jeju Island. A
negative correlation between the citric acid-carbon/TC ratios and δ13CTC
was obtained during the pollen episodes. These results
suggest that citric acid emitted from tangerine fruit may be adsorbed on the
airborne pollen and then transported to the Gosan site. Thermal evolution
patterns of organic carbon during the pollen episodes were characterized by
high OC evolution in the OC2 temperature step (450 °C). Since thermal
evolution patterns of organic aerosols are highly influenced by their
molecular weight, they can be used as additional information on the
formation of secondary organic aerosols and the effect of aging of organic
aerosols during the long-range atmospheric transport and sources of organic
aerosols. |
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