Hydroxyl radical-induced formation of highly oxidized organic compounds
Autor: | Tuija Jokinen, Henrik G. Kjaergaard, Torsten Berndt, Hartmut Herrmann, Mikael Ehn, Frank Stratmann, Theo Kurtén, Noora Hyttinen, Markku Kulmala, Mikko Sipilä, Stefanie Richters, Rasmus V. Otkjær |
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Přispěvatelé: | Department of Physics, Department of Chemistry, Polar and arctic atmospheric research (PANDA) |
Jazyk: | angličtina |
Rok vydání: | 2016 |
Předmět: |
Ozone
010504 meteorology & atmospheric sciences Radical Science General Physics and Astronomy ALPHA-PINENE PEROXY-RADICALS 010402 general chemistry Mass spectrometry Photochemistry 01 natural sciences 114 Physical sciences General Biochemistry Genetics and Molecular Biology Article Atmosphere chemistry.chemical_compound SULFURIC-ACID CHEMISTRY ATMOSPHERIC CONDITIONS 0105 earth and related environmental sciences Multidisciplinary Autoxidation Chemistry OH AEROSOL Sulfuric acid General Chemistry 0104 chemical sciences Aerosol 13. Climate action MASS-SPECTROMETER RO2 RADICALS Hydroxyl radical H2SO4 |
Zdroj: | Nature Communications, Vol 7, Iss 1, Pp 1-8 (2016) Berndt, T, Richters, S, Jokinen, T, Hyttinen, N, Kurtén, T, Otkjær, R V, Kjærgaard, H G, Stratmann, F, Herrmann, H, Sipilä, M, Kulmala, M & Ehn, M 2016, ' Hydroxyl radical-induced formation of highly oxidized organic compounds ', Nature Communications, vol. 7, 13677 . https://doi.org/10.1038/ncomms13677 Nature Communications |
ISSN: | 2041-1723 |
DOI: | 10.1038/ncomms13677 |
Popis: | Explaining the formation of secondary organic aerosol is an intriguing question in atmospheric sciences because of its importance for Earth's radiation budget and the associated effects on health and ecosystems. A breakthrough was recently achieved in the understanding of secondary organic aerosol formation from ozone reactions of biogenic emissions by the rapid formation of highly oxidized multifunctional organic compounds via autoxidation. However, the important daytime hydroxyl radical reactions have been considered to be less important in this process. Here we report measurements on the reaction of hydroxyl radicals with α- and β-pinene applying improved mass spectrometric methods. Our laboratory results prove that the formation of highly oxidized products from hydroxyl radical reactions proceeds with considerably higher yields than previously reported. Field measurements support these findings. Our results allow for a better description of the diurnal behaviour of the highly oxidized product formation and subsequent secondary organic aerosol formation in the atmosphere. Secondary organic aerosols are important contributors to the Earth's radiation budget, however questions remain about their formation from highly-oxidized precursors. Here the authors show that the daytime reaction of hydroxyl radicals with α- and β-pinene is a greater source of highly-oxidized products than previously assumed. |
Databáze: | OpenAIRE |
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