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| Titel |
Airship-based observations of formaldehyde in the planetary boundary layer over rural Finland |
| VerfasserIn |
Mitchell Thayer, Jennifer Kaiser, Frank Keutsch, Mathias Bachner, Sebastian Broch, Birger Bohn, Hendrik Fuchs, Sebastian Gomm, Rolf Häseler, Andreas Hofzumahaus, Frank Holland, Julia Jäger, Xin Li, Insa Lohse, Franz Rohrer, Ralf Tillmann, Robert Wegener, Thomas Mentel, Astrid Kiendler-Scharr, Andreas Wahner |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250100637
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| Publikation (Nr.) |
 EGU/EGU2014-16622.pdf |
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| Zusammenfassung |
| Formaldehyde (HCHO) is an important tracer for oxidative processes in the atmosphere such
as oxidation of volatile organic compounds (VOCs) and production of HO2 radicals (by
photolysis or reaction with OH). Products of VOC oxidation and radical cycling, such as
aerosols and tropospheric ozone, have direct impacts on human health. During
the Pan-European Gas-AeroSOls Climate Interaction Study (PEGASOS), HCHO
measurements were obtained together with OH reactivity, OH, HO2, CO, O3, NOx, HONO,
HONO, VOCs, and aerosol particle size distribution. HCHO concentration was
measured by the Madison FIber Laser-Induced Fluorescence (FILIF) instrument,
optimized for flight campaigns to accommodate size and power requirements. Here we
present data collected in rural areas near Jämijärvi, Finland in Spring 2013. Finland
provides a pristine environment, allowing investigation of primarily biogenic emission
and cycles. Measurements were carried out aboard a Zeppelin, which flew vertical
profiles ranging in altitude from ~ 200 – 1000 meters. In this way, we studied the
height-dependent evolution of the lower atmosphere, in which most VOC oxidation
chemistry occurs. Flights were carried out with starting times ranging from sunrise to
post-sunset. We present overall trends seen during the campaign of HCHO and related
species within the context of VOC oxidation and secondary pollutant production. |
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