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| Titel |
Diagnosing recent CO emissions and ozone evolution in East Asia using coordinated surface observations, adjoint inverse modeling, and MOPITT satellite data |
| VerfasserIn |
H. Tanimoto, Y. Sawa, S. Yonemura, K. Yumimoto, H. Matsueda, I. Uno, T. Hayasaka, H. Mukai, Y. Tohjima, K. Tsuboi, L. Zhang |
| 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 ; 8, no. 14 ; Nr. 8, no. 14 (2008-07-22), S.3867-3880 |
| Datensatznummer |
250006291
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| Publikation (Nr.) |
 copernicus.org/acp-8-3867-2008.pdf |
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| Zusammenfassung |
| Simultaneous ground-based measurements of ozone (O3) and carbon
monoxide (CO) were conducted in March 2005 as part of the East Asian
Regional Experiment (EAREX) 2005 under the umbrella of the Atmospheric Brown
Clouds (ABC) project. Multiple air quality monitoring networks were
integrated by performing intercomparison of individual calibration standards
and measurement techniques to ensure comparability of ambient measurements,
along with providing consistently high time-resolution measurements of
O3 and CO at the surface sites in East Asia. Ambient data collected
from eight surface stations were compared with simulation results obtained
by a regional chemistry transport model to infer recent changes in CO
emissions from East Asia. Our inverse estimates of the CO emissions from
China up to 2005 suggested an increase of 16% since 2001, in good
agreement with the recent MOPITT satellite observations and the bottom-up
estimates up to 2006. The O3 enhancement relative to CO in continental
pollution plumes traversed in the boundary layer were examined as a function
of transport time from the Asian continent to the western Pacific Ocean. The
observed ΔO3/ΔCO ratios show increasing tendency during
eastward transport events due likely to en-route photochemical O3
formation, suggesting that East Asia is an important O3 source region
during spring. |
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