This title appears in the Scientific Report :
2020
Please use the identifier:
http://dx.doi.org/10.5194/acp-2020-1215 in citations.
Please use the identifier: http://hdl.handle.net/2128/27713 in citations.
Pollution trace gases C<sub>2</sub>H<sub>6</sub>, C<sub>2</sub>H<sub>2</sub>, HCOOH, and PAN in the North Atlantic UTLS: observations and simulations
Pollution trace gases C<sub>2</sub>H<sub>6</sub>, C<sub>2</sub>H<sub>2</sub>, HCOOH, and PAN in the North Atlantic UTLS: observations and simulations
Abstract. 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 Radi...
| Personal Name(s): | Wetzel, Gerald (Corresponding author) |
|---|---|
| Friedl-Vallon, Felix / Glatthor, Norbert / Grooß, Jens-Uwe / Gulde, Thomas / Höpfner, Michael / Johansson, Sören / Khosrawi, Farahnaz / Kirner, Oliver / Kleinert, Anne / Kretschmer, Erik / Maucher, Guido / Nordmeyer, Hans / Oelhaf, Hermann / Orphal, Johannes / Piesch, Christof / Sinnhuber, Björn-Martin / Ungermann, Jörn / Vogel, Bärbel | |
| Contributing Institute: |
Stratosphäre; IEK-7 |
| Published in: | Atmospheric chemistry and physics / Discussions, 20 (2020) S. 39 pages |
| Imprint: |
Katlenburg-Lindau
EGU
2020
|
| DOI: |
10.5194/acp-2020-1215 |
| Document Type: |
Preprint |
| Research Program: |
Composition and dynamics of the upper troposphere and middle atmosphere |
| Link: |
OpenAccess |
| Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/27713 in citations.
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| 100 | 1 | |a Wetzel, Gerald |0 P:(DE-HGF)0 |b 0 |e Corresponding author | |
| 245 | |a Pollution trace gases C<sub>2</sub>H<sub>6</sub>, C<sub>2</sub>H<sub>2</sub>, HCOOH, and PAN in the North Atlantic UTLS: observations and simulations | ||
| 260 | |a Katlenburg-Lindau |c 2020 |b EGU | ||
| 520 | |a Abstract. 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 (VMR) 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. Since PAN has the longest lifetime of this foursome, elevated quantities of this molecule could be measured even in the lowermost stratosphere (locally up to 14 km). Backward trajectory calculations as well as global three-dimensional 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 and Southeast Asia uplifted and moved within the Asian monsoon anticyclone (AMA) circulation system. After release from the AMA, these species or their precursor substances are transported by strong tropospheric winds over large distances, depending on their particular atmospheric lifetime of up to months. Observations are compared to simulations with the atmospheric models EMAC (ECHAM5/MESSy Atmospheric Chemistry) and CAMS (Copernicus Atmosphere Monitoring Service). These models are qualitatively able to reproduce the measured VMR enhancements but underestimate the absolute amount of the increase. Increasing the emissions in EMAC by a factor of 2 reduces the disagreement between simulated and measured results and illustrates the importance of the quality of emission databases used in chemical models. | ||
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