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| Titel |
Structure and Evolution of Formaldehyde Vertical Profiles in the Po Valley |
| VerfasserIn |
Jennifer Kaiser, Glenn M. Wolfe, Frank N. Keutsch, Laurens N. Ganzeveld, Sebastian Broch, Birger Bohn, Hendrik Fuchs, Sebastian Gomm, Rolf Hӓseler, Andreas Hofzumahaus, Frank Holland, Julia Jӓger, Keding Lu, Xin Li, Insa Lohse, Franz Rohrer, Robert Wegener, Thomas F. 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 |
250092399
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| Publikation (Nr.) |
 EGU/EGU2014-6739.pdf |
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| Zusammenfassung |
| As both a source of HO2 radicals and an intermediate in the oxidation of most volatile organic compounds (VOCs), formaldehyde (HCHO) is a useful tracer for the oxidative processing of hydrocarbons that leads to the formation of secondary pollutants. During the Pan-European Gas-AeroSOls Climate Interaction Study (PEGASOS), Zeppelin-based observations allowed for high spatial and temporal mapping of HCHO throughout the planetary boundary. Here, we focus on one flight in the Po Valley in Northern Italy, where clear delineations between the nocturnal boundary layer, residual layer, and growing mixed layer are observable. Early morning profiles demonstrate an inversion in HCHO concentrations, which gradually reverses as the mixed layer develops throughout the day. In the later morning, as little as 1.4 ppb HCHO is observed in the residual layer, while 3.8 ppb HCHO is observed in the mixed layer. Preliminary analysis shows oxidized VOCs are the dominant source of HCHO throughout the planetary boundary layer. Using a 1-D box model, we further examine the role of dynamics and chemistry in the structure and evolution of HCHO vertical profiles.
Acknowledgement: PEGASOS project funded by the European Commission under the Framework Programme 7 (FP7-ENV-2010-265148). Additional support provided by NSF GRFP DGE-1256259, and NSF AGS-1051338. |
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