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| Titel |
Modeling the regional impact of ship emissions on NOx and ozone levels over the Eastern Atlantic and Western Europe using ship plume parameterization |
| VerfasserIn |
P. Huszar, D. Cariolle, R. Paoli, T. Halenka, M. Belda, H. Schlager, J. Miksovsky, P. Pisoft |
| 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 ; 10, no. 14 ; Nr. 10, no. 14 (2010-07-21), S.6645-6660 |
| Datensatznummer |
250008643
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| Publikation (Nr.) |
 copernicus.org/acp-10-6645-2010.pdf |
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| Zusammenfassung |
| In general, regional and global chemistry transport models apply
instantaneous mixing of emissions into the model's finest resolved scale. In
case of a concentrated source, this could result in erroneous calculation of
the evolution of both primary and secondary chemical species. Several studies
discussed this issue in connection with emissions from ships and aircraft.
In this study, we present an approach to deal with the non-linear effects
during dispersion of NOx emissions from ships. It represents an adaptation
of the original approach developed for aircraft NOx emissions, which uses
an exhaust tracer to trace the amount of the emitted species in the plume and
applies an effective reaction rate for the ozone production/destruction
during the plume's dilution into the background air. In accordance with
previous studies examining the impact of international shipping on the
composition of the troposphere, we found that the contribution of ship
induced surface NOx to the total reaches 90% over remote ocean and makes
10–30% near coastal regions. Due to ship emissions, surface ozone increases
by up to 4–6 ppbv making 10% contribution to the surface ozone budget. When
applying the ship plume parameterization, we show that the large scale
NOx decreases and the ship NOx contribution is reduced by up to
20–25%. A similar decrease was found in the case of O3. The plume
parameterization suppressed the ship induced ozone production by 15–30% over
large areas of the studied region. To evaluate the presented
parameterization, nitrogen monoxide measurements over the English Channel were
compared with modeled values and it was found that after activating the
parameterization the model accuracy increases. |
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