Journal ArticleDOI
Temperature Effects on Secondary Organic Aerosol (SOA) from the Dark Ozonolysis and Photo-Oxidation of Isoprene
TLDR
These experiments show that isoprene readily forms SOA in unseeded chamber experiments, even during dark ozonolysis, and reveal that temperature affects SOA yield, volatility, and density formed from isophene.Abstract:
Isoprene is globally the most ubiquitous nonmethane hydrocarbon. The biogenic emission is found in abundance and has a propensity for SOA formation in diverse climates. It is important to characterize isoprene SOA formation with varying reaction temperature. In this work, the effect of temperature on SOA formation, physical properties, and chemical nature is probed. Three experimental systems are probed for temperature effects on SOA formation from isoprene, NO + H2O2 photo-oxidation, H2O2 only photo-oxidation, and dark ozonolysis. These experiments show that isoprene readily forms SOA in unseeded chamber experiments, even during dark ozonolysis, and also reveal that temperature affects SOA yield, volatility, and density formed from isoprene. As temperature increases SOA yield is shown to generally decrease, particle density is shown to be stable (or increase slightly), and formed SOA is shown to be less volatile. Chemical characterization is shown to have a complex trend with both temperature and oxidant...read more
Citations
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Journal ArticleDOI
Secondary organic aerosol reduced by mixture of atmospheric vapours
Gordon McFiggans,Thomas F. Mentel,Juergen Wildt,Iida Pullinen,Iida Pullinen,Sungah Kang,Einhard Kleist,Sebastian Schmitt,Monika Springer,Ralf Tillmann,Cheng Wu,Cheng Wu,Defeng Zhao,Defeng Zhao,Mattias Hallquist,Cameron Faxon,Michael Le Breton,Michael Le Breton,Åsa M. Hallquist,David Simpson,David Simpson,Robert Bergström,Robert Bergström,Robert Bergström,Michael E. Jenkin,Mikael Ehn,Joel A. Thornton,M. Rami Alfarra,Thomas J. Bannan,Carl J. Percival,Carl J. Percival,Michael Priestley,David Topping,Astrid Kiendler-Scharr,Astrid Kiendler-Scharr +34 more
TL;DR: It is shown that isoprene, carbon monoxide and methane can each suppress the instantaneous mass and the overall mass yield derived from monoterpenes in mixtures of atmospheric vapours, suggesting that formation mechanisms of secondary organic aerosol in the atmosphere need to be considered more realistically.
Journal ArticleDOI
Different roles of water in secondary organic aerosol formation from toluene and isoprene
TL;DR: In this paper, the role of water in the formation of secondary organic aerosol (SOA) from the irradiations of toluene-NO2 and isoprene-NO 2 was investigated in a smog chamber.
Journal ArticleDOI
Low-volatility compounds contribute significantly to isoprene secondary organic aerosol (SOA) under high-NO x conditions
Rebecca H. Schwantes,Rebecca H. Schwantes,Sophia M. Charan,Kelvin H. Bates,Kelvin H. Bates,Yuanlong Huang,Tran B. Nguyen,Huajun Mai,Weimeng Kong,Richard C. Flagan,John H. Seinfeld +10 more
TL;DR: In this paper, the authors examined the impact of chamber walls on secondary organic aerosol (SOA) mass production under high NOx conditions and showed that low-volatility compounds such as organic nano-nitrates and dinitrates may contribute to isoprene SOA under high-NOx conditions significantly more than previously thought.
Journal ArticleDOI
Impacts of peat-forest smoke on urban PM2.5 in the Maritime Continent during 2012-2015: Carbonaceous profiles and indicators.
Jackson Tham,Sayantan Sarkar,Shiguo Jia,Jeffrey S. Reid,Shailendra Mishra,I. M. Sudiana,Sanjay Swarup,Choon Nam Ong,Liya E. Yu +8 more
TL;DR: Assessing >2900 hourly OCEC data in 2017-2018 supports the applicability of the PFS indicator to evaluate hourly impacts of PF smoke on receptor urban PM2.5 in the Maritime Continent.
Journal ArticleDOI
Strong anthropogenic control of secondary organic aerosol formation from isoprene in Beijing
Daniel J. Bryant,William Dixon,James R. Hopkins,Rachel Dunmore,Kelly L. Pereira,Marvin D. Shaw,Freya Squires,Thomas J. Bannan,Archit Mehra,Stephen D. Worrall,Stephen D. Worrall,Asan Bacak,Hugh Coe,Carl J. Percival,Carl J. Percival,Lisa K. Whalley,Dwayne E. Heard,Eloise Slater,Bin Ouyang,Bin Ouyang,Tianqu Cui,Tianqu Cui,Jason D. Surratt,Di Liu,Zongbo Shi,Roy M. Harrison,Yele Sun,Weiqi Xu,Alastair C. Lewis,James D. Lee,Andrew R. Rickard,J. F. Hamilton +31 more
TL;DR: In this article, the authors examined the formation of anthropogenic influenced secondary organic aerosol (iSOA) during summer in Beijing, China, and found that high NOx and particulate SO 4 2 -levels led to high and low NO oxidation conditions, with significant transformations of isoprene-derived oxidation products to particulate organosulfates (OSs) and nitrooxy-organosulfate (NOSs).
References
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TL;DR: In this article, the role of epoxydiols of isoprene and methacryloylperoxynitrate (MPAN) in the formation of secondary organic aerosol (SOA) was identified.
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