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| Titel |
Variations of surface ozone at Ieodo Ocean Research Station in the East China Sea and the influence of Asian outflows |
| VerfasserIn |
J. Han, B. Shin, M. Lee, G. Hwang, J. Kim, J. Shim, G. Lee, C. Shim |
| 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 ; 15, no. 21 ; Nr. 15, no. 21 (2015-11-12), S.12611-12621 |
| Datensatznummer |
250120159
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| Publikation (Nr.) |
 copernicus.org/acp-15-12611-2015.pdf |
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| Zusammenfassung |
| Ieodo Ocean Research Station (IORS), a research tower (~ 40 m a.s.l.) for atmospheric and oceanographic observations, is located in the
East China Sea (32.07° N, 125.10° E). The IORS is almost
equidistant from South Korea, China, and Japan and, therefore, it is an
ideal place to observe Asian outflows without local emission effects. The
seasonal variation of ozone was distinct, with a minimum in August (37 ppbv)
and two peaks in April and October (62 ppbv), and was largely affected by
the seasonal wind pattern over east Asia. At IORS, six types of air masses were
distinguished with different levels of O3 concentrations by the cluster
analysis of backward trajectories. Marine air masses from the Pacific Ocean
represent a relatively clean background air with a lowest ozone level of 32 ppbv,
which was most frequently observed in summer (July–August). In spring (March–April) and
winter (December–February), the influence of Chinese outflows was dominant
with higher ozone concentrations of 62 and 49 ppbv, respectively. This
study confirms that the influence of Chinese outflows was the main factor
determining O3 levels at IORS and its extent was dependent on
meteorological state, particularly at a long-term scale. |
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