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| Titel |
Stratospheric ozone in boreal fire plumes – the 2013 smoke season over central Europe |
| VerfasserIn |
T. Trickl, H. Vogelmann, H. Flentje, L. Ries |
| 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 ; 15, no. 16 ; Nr. 15, no. 16 (2015-08-28), S.9631-9649 |
| Datensatznummer |
250119999
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| Publikation (Nr.) |
 copernicus.org/acp-15-9631-2015.pdf |
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| Zusammenfassung |
| In July 2013 very strong boreal fire plumes were observed at the northern rim
of the Alps by lidar and ceilometer measurements of aerosol, ozone and water
vapour for about 3 weeks. In addition, some of the lower-tropospheric
components of these layers were analysed at the Global Atmosphere Watch
laboratory at the Schneefernerhaus high-altitude research station
(2650 m a.s.l., located a few hundred metres south-west of the Zugspitze
summit). The high amount of particles confirms our hypothesis that fires in
the Arctic regions of North America lead to much stronger signatures in the
central European atmosphere than the multitude of fires in the USA.
This has been ascribed to the prevailing anticyclonic advection pattern
during favourable periods and subsidence, in contrast to warm-conveyor-belt
export, rainout and dilution frequently found for lower latitudes. A high
number of the pronounced aerosol structures were positively correlated with
elevated ozone. Chemical ozone formation in boreal fire plumes is known to be
rather limited. Indeed, these air masses could be attributed to stratospheric
air intrusions descending from remote high-latitude regions, obviously
picking up the aerosol on their way across Canada. In one case, subsidence
from the stratosphere over Siberia over as many as 15–20 days without
increase in humidity was observed although a significant amount of Canadian
smoke was trapped. These coherent air streams lead to rather straight and
rapid transport of the particles to Europe. |
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