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| Titel |
Fast transport from Southeast Asia boundary layer sources to northern Europe: rapid uplift in typhoons and eastward eddy shedding of the Asian monsoon anticyclone |
| VerfasserIn |
B. Vogel, G. Günther, R. Müller, J.-U. Grooß, P. Hoor, M. Krämer, S. Müller, A. Zahn, M. Riese |
| 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 ; 14, no. 23 ; Nr. 14, no. 23 (2014-12-04), S.12745-12762 |
| Datensatznummer |
250119206
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| Publikation (Nr.) |
 copernicus.org/acp-14-12745-2014.pdf |
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| Zusammenfassung |
| Enhanced tropospheric trace gases such as CO, CH4 and H2O and reduced
stratospheric O3 were measured in situ in the lowermost stratosphere over
northern Europe on 26 September 2012 during the TACTS aircraft campaign. The
measurements indicate that these air masses clearly differ from the
stratospheric background. The calculation of 40-day backward trajectories
with the trajectory module of the CLaMS model shows that these air masses are
affected by the Asian monsoon anticyclone. Some air masses originate from the
boundary layer in Southeast Asia/West Pacific and are rapidly lifted (1–2
days) within a typhoon up to the outer edge of the Asian monsoon anticyclone.
Afterwards, the air parcels are entrained by the anticyclonic circulation of
the Asian monsoon. The subsequent long-range transport (8–14 days) of
enhanced water vapour and pollutants to the lowermost stratosphere in
northern Europe is driven by eastward transport of tropospheric air from the
Asian monsoon anticyclone caused by an eddy shedding event. We found that the
combination of rapid uplift by a typhoon and eastward eddy shedding from the
Asian monsoon anticyclone is a novel fast transport pathway that may carry
boundary emissions from Southeast Asia/West Pacific within approximately 5
weeks to the lowermost stratosphere in northern Europe. |
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