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| Titel |
Tropospheric OH and Cl levels deduced from non-methane hydrocarbon measurements in a marine site |
| VerfasserIn |
C. Arsene, A. Bougiatioti, M. Kanakidou, B. Bonsang, N. Mihalopoulos |
| 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 ; 7, no. 17 ; Nr. 7, no. 17 (2007-09-14), S.4661-4673 |
| Datensatznummer |
250005190
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| Publikation (Nr.) |
 copernicus.org/acp-7-4661-2007.pdf |
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| Zusammenfassung |
| In situ continuous hourly measurements of C2–C8 non-methane
hydrocarbons (NMHCS) have been performed from March to October 2006 at
two coastal locations (natural and rural) on the island of Crete, in the
Eastern Mediterranean. Well defined diel variations were observed for
several short lived NMHCS (including ethene, propene, n-butane,
n-pentane, n-hexane, 2-methyl-pentane). The daytime concentration of
hydroxyl (OH) radicals estimated from these experimental data varied from
1.3×106 to ~4.0×106 radical cm−3, in
good agreement with box-model simulations. In addition the relative
variability of various hydrocarbon pairs (at least 7) was used to derive the
tropospheric levels of Cl atoms. The Cl atom concentration has been
estimated to range between 0.6×104 and 4.7×104 atom cm−3,
in good agreement with gaseous hydrochloric acid (HCl)
observations in the area. Such levels of Cl atoms can be of considerable
importance for the oxidation capacity of the troposphere on a regional
scale. |
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