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Pollution trace gases C₂H₆, C₂H₂, HCOOH, and PAN in the North Atlantic UTLS: observations and simulations

Wetzel, Gerald 1; Friedl-Vallon, Felix 1; Glatthor, Norbert 1; Grooß, Jens-Uwe; Gulde, Thomas 1; Höpfner, Michael ORCID iD icon 1; Johansson, Sören ORCID iD icon 1; Khosrawi, Farahnaz 1; Kirner, Oliver 2; Kleinert, Anne 1; Kretschmer, Erik 1; Maucher, Guido 1; Nordmeyer, Hans 1; Oelhaf, Hermann 1; Orphal, Johannes 1; Piesch, Christof 1; Sinnhuber, Björn-Martin 1; Ungermann, Jörn; Vogel, Bärbel
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)
2 Steinbuch Centre for Computing (SCC), Karlsruher Institut für Technologie (KIT)

Measurements of the pollution trace gases ethane (C2H6), ethyne (C2H2), formic acid (HCOOH), and peroxyacetyl nitrate (PAN) were performed in the North Atlantic upper troposphere and lowermost stratosphere (UTLS) region with the airborne limb imager GLORIA (Gimballed Limb Observer for Radiance Imaging of the Atmosphere) with high spatial resolution down to cloud top. Observations were made during flights with the German research aircraft HALO (High Altitude and LOng Range Research Aircraft) in the frame of the WISE (Wave-driven ISentropic Exchange) campaign, which was carried out in autumn 2017 from Shannon (Ireland) and Oberpfaffenhofen (Germany). Enhanced volume mixing ratios (VMRs) of up to 2.2 ppbv C2H6, 0.2 ppbv C2H2, 0.9 ppbv HCOOH, and 0.4 ppbv PAN were detected during the flight on 13 September 2017 in the upper troposphere and around the tropopause above the British Isles. Elevated quantities of PAN were measured even in the lowermost stratosphere (locally up to 14 km), likely reflecting the fact that this molecule has the longest lifetime of the four species discussed herein. Backward trajectory calculations as well as global three-dimensional Chemical Lagrangian Model of the Stratosphere (CLaMS) simulations with artificial tracers of air mass origin have shown that the main sources of the observed pollutant species are forest fires in North America and anthropogenic pollution in South Asia and Southeast Asia uplifted and moved within the Asian monsoon anticyclone (AMA) circulation system. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000133403
Veröffentlicht am 31.05.2021
DOI: 10.5194/acp-21-8213-2021
Zitationen: 4
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Institut für Meteorologie und Klimaforschung (IMK)
Steinbuch Centre for Computing (SCC)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1680-7324
KITopen-ID: 1000133403
HGF-Programm 12.11.25 (POF IV, LK 01) Atmospheric composition and circulation changes
Weitere HGF-Programme 46.21.01 (POF IV, LK 01) Domain-Specific Simulation & SDLs and Research Groups
Erschienen in Atmospheric chemistry and physics
Verlag European Geosciences Union (EGU)
Band 21
Heft 10
Seiten 8213–8232
Vorab online veröffentlicht am 27.05.2021
Nachgewiesen in Web of Science
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