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| Titel |
Impact of climate change on photochemical air pollution in Southern California |
| VerfasserIn |
D. E. Millstein, R. A. Harley |
| 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 ; 9, no. 11 ; Nr. 9, no. 11 (2009-06-10), S.3745-3754 |
| Datensatznummer |
250007364
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| Publikation (Nr.) |
 copernicus.org/acp-9-3745-2009.pdf |
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| Zusammenfassung |
| The effects of future climate and emissions-related perturbations on ozone
air quality in Southern California are considered, with an assumed increase
to 2× pre-industrial levels for global background levels of carbon
dioxide. Effects of emission and climate-related forcings on air quality are
superimposed on a summer 2005 high-ozone time period. Perturbations
considered here include (a) effect of increased temperature on atmospheric
reaction rates, (b) effect of increased temperature on biogenic emissions,
(c) effect of increased water vapor concentrations, (d) effect of increased
pollutant levels at the inflow (western) boundary, and (e) effect of
population growth and technology change on emissions within Southern
California. Various combinations of the above perturbations are also
considered. The climate-related perturbations (a–c) led to combined peak 1-h
ozone increases of up to 11 ppb. The effect on ozone was greatly reduced
when the temperature increase was applied mostly during nighttime hours
rather than uniformly throughout the day. Increased pollutant levels at the
inflow boundary also led to ozone increases up to 5 ppb. These climate and
inflow-related changes offset some of the anticipated benefits of emission
controls within the air basin. |
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