Articles | Volume 22, issue 4
Atmos. Chem. Phys., 22, 2689–2701, 2022
https://doi.org/10.5194/acp-22-2689-2022
Atmos. Chem. Phys., 22, 2689–2701, 2022
https://doi.org/10.5194/acp-22-2689-2022

Research article 01 Mar 2022

Research article | 01 Mar 2022

Evaluation of the daytime tropospheric loss of 2-methylbutanal

María Asensio et al.

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Cited articles

Albaladejo, J., Ballesteros, B., Jiménez, E., Martín, P., and Martínez, E.: A PLP–LIF kinetic study of the atmospheric reactivity of a series of C4–C7 saturated and unsaturated aliphatic aldehydes with OH, Atmos. Environ., 36, 3231–3239, https://doi.org/10.1016/S1352-2310(02)00323-0, 2002. 
Antiñolo, M., Jiménez, E., Notario, A., Martínez, E., and Albaladejo, J.: Tropospheric photooxidation of CF3CH2CHO and CF3(CH2)2CHO initiated by Cl atoms and OH radicals, Atmos. Chem. Phys., 10, 1911–1922, https://doi.org/10.5194/acp-10-1911-2010, 2010. 
Antiñolo, M., Olmo, R. D., Bravo, I., Albaladejo, J., and Jiménez, E.: Tropospheric fate of allyl cyanide (CH2=CHCH2CN): Kinetics, reaction products and secondary organic aerosol formation, Atmos. Environ., 219, 117041, https://doi.org/10.1016/j.atmosenv.2019.117041, 2019. 
Antiñolo, M., Asensio, M., Albaladejo, J., and Jiménez, E.: Gas-Phase Reaction of trans-2-Methyl-2-butenal with Cl: Kinetics, Gaseous Products, and SOA Formation, Atmosphere, 11, 715, https://doi.org/10.3390/atmos11070715, 2020. 
Atkinson, R., Baulch, D. L., Cox, R. A., Crowley, J. N., Hampson, R. F., Hynes, R. G., Jenkin, M. E., Rossi, M. J., Troe, J., and IUPAC Subcommittee: Evaluated kinetic and photochemical data for atmospheric chemistry: Volume II – gas phase reactions of organic species, Atmos. Chem. Phys., 6, 3625–4055, https://doi.org/10.5194/acp-6-3625-2006, 2006. 
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Short summary
The diurnal atmospheric degradation of 2-methylbutanal, 2 MB, emitted by sources like vegetation or the poultry industry is evaluated in this work. Sunlight and oxidants like hydroxyl (OH) radicals and chlorine (Cl) atoms initiate this degradation. Measurements of how fast 2 MB is degraded and what products are generated are presented. The lifetime of 2 MB is around 1 h at noon, when the OH reaction dominates. Thus, 2 MB will not be transported far, affecting only local air quality.
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