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| Titel |
Analysis of ΔO2/ΔCO2 ratios for the pollution events observed at Hateruma Island, Japan |
| VerfasserIn |
C. Minejima, M. Kubo, Y. Tohjima, H. Yamagishi, Y. Koyama, S. Maksyutov, K. Kita, H. Mukai |
| 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 ; 12, no. 5 ; Nr. 12, no. 5 (2012-03-14), S.2713-2723 |
| Datensatznummer |
250010872
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| Publikation (Nr.) |
 copernicus.org/acp-12-2713-2012.pdf |
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| Zusammenfassung |
| Pollution events extracted from the in situ observations of atmospheric
CO2 and O2 mixing ratios at Hateruma Island
(HAT, 24° N, 124° E) during the period from October 2006 and December 2008 are examined. The
air mass origins for the pollution events are categorized by using back
trajectory analysis, and the oxidative ratios (OR = −O2:CO2 molar
exchange ratio) for selected pollution events are calculated. We find that
there is a significant difference in the average oxidative ratios between
events from China (OR = 1.14 ± 0.12, n = 25) and Japan/Korea
(OR = 1.37 ± 0.15, n = 16). These values are in a good agreement with the national
average oxidative ratios for the emissions from fossil fuel burning and
cement production (FFBC) in China (ORFFBC = 1.11 ± 0.03) and
Korea/Japan (ORFFBC = 1.36 ± 0.02). Compared with the observation,
simulations of the atmospheric O2 and CO2 mixing ratios using
Lagrangian particle dispersion models do a good job in reconstructing the
average oxidative ratio of the pollution events originating in China but
tend to underestimate for events originating in Japan/Korea. A sensitivity
test suggests that the simulated atmospheric oxidative ratios at HAT are
especially sensitive to changes in Chinese fuel mix. |
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