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| Titel |
The impact of free convection on late morning ozone decreases on an Alpine foreland mountain summit |
| VerfasserIn |
J.-C. Mayer, K. Staudt, S. Gilge, F. X. Meixner, T. Foken |
| 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 ; 8, no. 19 ; Nr. 8, no. 19 (2008-10-15), S.5941-5956 |
| Datensatznummer |
250006407
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| Publikation (Nr.) |
 copernicus.org/acp-8-5941-2008.pdf |
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| Zusammenfassung |
| Exceptional patterns in the diurnal course of ozone mixing ratio at a
mountain top site (998 m a.s.l.) were observed during a field experiment
(September 2005). They manifested themselves as strong and sudden decreases
of ozone mixing ratio with a subsequent return to previous levels. The
evaluation of corresponding long-term time series (2000–2005) revealed that
such events occur mainly during summer, and affect the mountain top site on
about 18% of the summer days. Combining (a) surface layer measurements
at mountain summit and at the foot of the mountain, (b) in-situ (tethered
balloon) and remote sensing (SODAR-RASS) measurements within the atmospheric
boundary layer, the origin of these events of sudden ozone decrease could be
attributed to free convection. The free convection was triggered by a rather
frequently occurring wind speed minimum around the location of the mountain. |
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