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| Titel |
The contribution of marine organics to the air quality of the western United States |
| VerfasserIn |
B. Gantt, N. Meskhidze, A. G. Carlton |
| 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. 15 ; Nr. 10, no. 15 (2010-08-09), S.7415-7423 |
| Datensatznummer |
250008695
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| Publikation (Nr.) |
 copernicus.org/acp-10-7415-2010.pdf |
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| Zusammenfassung |
| The contribution of marine organic emissions to the air quality in coastal
areas of the western United States is studied using the latest version of
the US Environmental Protection Agency (EPA) regional-scale Community
Multiscale Air Quality (CMAQv4.7) modeling system. Emissions of marine
isoprene, monoterpenes, and primary organic matter (POM) from the ocean are
implemented into the model to provide a comprehensive view of the connection
between ocean biology and atmospheric chemistry and air pollution. Model
simulations show that marine organics can increase the concentration of
PM2.5 by 0.1–0.3 μg m−3 (up to 5%) in some coastal cities
such as San Francisco, CA. This increase in the PM2.5 concentration is
primarily attributed to the POM emissions, with small contributions from the
marine isoprene and monoterpenes. When marine organic emissions are
included, organic carbon (OC) concentrations over the remote ocean are
increased by up to 50% (25% in coastal areas), values consistent with
recent observational findings. This study is the first to quantify the air
quality impacts from marine POM and monoterpenes for the United States, and
it highlights the need for inclusion of marine organic emissions in air quality
models. |
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