 |
| Titel |
The impact of temperature changes on summer time ozone and its precursors in the Eastern Mediterranean |
| VerfasserIn |
U. Im, K. Markakis, A. Poupkou, D. Melas, A. Unal, E. Gerasopoulos, N. Daskalakis, T. Kindap, M. Kanakidou |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 11, no. 8 ; Nr. 11, no. 8 (2011-04-27), S.3847-3864 |
| Datensatznummer |
250009654
|
| Publikation (Nr.) |
 copernicus.org/acp-11-3847-2011.pdf |
|
|
|
|
|
| Zusammenfassung |
| Changes in temperature due to variability in meteorology and climate change
are expected to significantly impact atmospheric composition. The
Mediterranean is a climate sensitive region and includes megacities like
Istanbul and large urban agglomerations such as Athens. The effect of
temperature changes on gaseous air pollutant levels and the atmospheric
processes that are controlling them in the Eastern Mediterranean are here
investigated. The WRF/CMAQ mesoscale modeling system is used, coupled with
the MEGAN model for the processing of biogenic volatile organic compound
emissions. A set of temperature perturbations (spanning from 1 to 5 K) is
applied on a base case simulation corresponding to July 2004. The results
indicate that the Eastern Mediterranean basin acts as a reservoir of
pollutants and their precursor emissions from large urban agglomerations.
During summer, chemistry is a major sink at these urban areas near the
surface, and a minor contributor at downwind areas. On average, the
atmospheric processes are more effective within the first 1000 m above
ground. Temperature increases lead to increases in biogenic emissions by
9±3% K−1. Ozone mixing ratios increase almost linearly with
the increases in ambient temperatures by 1±0.1 ppb O3 K−1 for
all studied urban and receptor stations except for Istanbul, where a 0.4±0.1 ppb O3 K−1 increase is calculated, which is about half of the
domain-averaged increase of 0.9±0.1 ppb O3 K−1. The computed
changes in atmospheric processes are also linearly related with temperature
changes. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|