Impact of pyruvic acid photolysis on acetaldehyde and peroxy radical formation in the boreal forest: theoretical calculations and model results

Based on the first measurements of gas-phase pyruvic acid (CH.sub.3 C(O)C(O)OH) in the boreal forest, we derive effective emission rates of pyruvic acid and compare them with monoterpene emission rates over the diel cycle. Using a data-constrained box model, we determine the impact of pyruvic acid p...

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Veröffentlicht in:	Atmospheric chemistry and physics 2021-09, Vol.21 (18), p.14333-14349
Hauptverfasser:	Eger, Philipp G, Vereecken, Luc, Sander, Rolf, Schuladen, Jan, Sobanski, Nicolas, Fischer, Horst, Karu, Einar, Williams, Jonathan, Vakkari, Ville, Petäjä, Tuukka, Lelieveld, Jos, Pozzer, Andrea, Crowley, John N
Format:	Artikel
Sprache:	eng
Schlagworte:	Acetaldehyde Acids Atmospheric aerosols Boreal forests Carbon dioxide Chemistry Covalent bonds Dissociation Emission Emissions Emissions (Pollution) Fission Forests Gases Hydrogen peroxide Isomerization Mixing ratio Modelling Outdoor air quality Oxidation Peroxy radicals Photodissociation Photolysis Pyruvic acid Radicals Ratios Taiga Wavelengths
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Zusammenfassung:	Based on the first measurements of gas-phase pyruvic acid (CH.sub.3 C(O)C(O)OH) in the boreal forest, we derive effective emission rates of pyruvic acid and compare them with monoterpene emission rates over the diel cycle. Using a data-constrained box model, we determine the impact of pyruvic acid photolysis on the formation of acetaldehyde (CH.sub.3 CHO) and the peroxy radicals CH.sub.3 C(O)O.sub.2 and HO.sub.2 during an autumn campaign in the boreal forest.
ISSN:	1680-7324 1680-7316 1680-7324
DOI:	10.5194/acp-21-14333-2021