Journal ArticleDOI
Secondary organic aerosol formation from isoprene photooxidation.
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TLDR
In this paper, the mechanism of secondary organic aerosol (SOA) formation by isoprene photooxidation is comprehensively investigated, by measurements of SOA yields over a range of experimental conditions, namely the NOx and NOx concentrations.Abstract:
Recent work has shown that the atmospheric oxidation of isoprene (2-methyl-1,3-butadiene, C5H8) leads to the formation of secondary organic aerosol (SOA). In this study, the mechanism of SOA formation by isoprene photooxidation is comprehensively investigated, by measurements of SOA yields over a range of experimental conditions, namely isoprene and NOx concentrations. Hydrogen peroxide is used as the radical precursor, substantially constraining the observed gas-phase chemistry; all oxidation is dominated by the OH radical, and organic peroxy radicals (RO2) react only with HO2 (formed in the OH + H2O2 reaction) or NO concentrations, including NOx-free conditions. At high NOx, yields are found to decrease substantially with increasing [NOx], indicating the importance of RO2 chemistry in SOA formation. Under low-NOx conditions, SOA mass is observed to decay rapidly, a result of chemical reactions of semivolatile SOA components, most likely organic hydroperoxides.read more
Citations
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Journal ArticleDOI
The formation, properties and impact of secondary organic aerosol: current and emerging issues
Mattias Hallquist,John C. Wenger,Urs Baltensperger,Yinon Rudich,David Simpson,David Simpson,Magda Claeys,J. Dommen,Neil M. Donahue,Christian George,Christian George,Allen H. Goldstein,Jacqueline F. Hamilton,Hartmut Herrmann,Thorsten Hoffmann,Yoshiteru Iinuma,Myoseon Jang,Michael E. Jenkin,Jose L. Jimenez,Astrid Kiendler-Scharr,Willy Maenhaut,Gordon McFiggans,Th. F. Mentel,Anne Monod,André S. H. Prévôt,John H. Seinfeld,Jason D. Surratt,Rafal Szmigielski,Jürgen Wildt +28 more
TL;DR: In this article, an overview of the atmospheric degradation mechanisms for SOA precursors, gas-particle partitioning theory and analytical techniques used to determine the chemical composition of SOA is presented.
Journal ArticleDOI
Chemistry of secondary organic aerosol: Formation and evolution of low-volatility organics in the atmosphere
Jesse H. Kroll,John H. Seinfeld +1 more
TL;DR: A review of the chemistry of the formation and continuing transformation of low-volatility species in the atmosphere can be found in this article, where the primary focus is chemical processes that can change the volatility of organic compounds: oxidation reactions in the gas phase, reaction in the particle phase, and reaction in either phase over several generations.
Journal ArticleDOI
Coupled partitioning, dilution, and chemical aging of semivolatile organics.
TL;DR: The time evolution strongly suggests that neglected oxidation of numerous "intermediate volatility" vapors (IVOCs, with saturation concentrations above approximately 1 mg m(-3)) may contribute significantly to ambient SOA formation.
Journal ArticleDOI
Organic aerosol components observed in Northern Hemispheric datasets from Aerosol Mass Spectrometry
Nga L. Ng,Manjula R. Canagaratna,Qi Zhang,Qi Zhang,Jose L. Jimenez,Jian Tian,Ingrid M. Ulbrich,Jesse H. Kroll,Kenneth S. Docherty,P. S. Chhabra,Roya Bahreini,Roya Bahreini,Shane M. Murphy,John H. Seinfeld,Lea Hildebrandt,Neil M. Donahue,Peter F. DeCarlo,Peter F. DeCarlo,V. A. Lanz,André S. H. Prévôt,E. Dinar,Yinon Rudich,D. R. Worsnop +22 more
TL;DR: In this article, the authors present results from the factor analysis of 43 AMS datasets (27 of the datasets are reanalyzed in this work) and provide a holistic overview of Northern Hemisphere organic aerosol (OA) and its evolution in the atmosphere.
Journal ArticleDOI
A review of Secondary Organic Aerosol (SOA) formation from isoprene
TL;DR: A review of field measurements, experimental work, and modeling studies aimed at understanding the mechanisms, yield, and atmospheric importance of isoprene-derived secondary organic aerosol (SOA) is presented in this article.
References
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Journal ArticleDOI
Organic aerosol and global climate modelling: a review
Maria Kanakidou,John H. Seinfeld,Spyros N. Pandis,Ian Barnes,Frank Dentener,Maria Cristina Facchini,R. Van Dingenen,Barbara Ervens,Athanasios Nenes,Claus J. Nielsen,Erik Swietlicki,J. P. Putaud,Yves Balkanski,Sandro Fuzzi,J. Horth,Geert K. Moortgat,R. Winterhalter,Cathrine Lund Myhre,Kostas Tsigaridis,Elisabetta Vignati,Euripides G. Stephanou,J. Wilson +21 more
TL;DR: In this article, the authors reviewed existing knowledge with regard to organic aerosol (OA) of importance for global climate modelling and defined critical gaps needed to reduce the involved uncertainties, and synthesized the information to provide a continuous analysis of the flow from the emitted material to the atmosphere up to the point of the climate impact of the produced organic aerosols.
Journal ArticleDOI
Evaluated kinetic and photochemical data for atmospheric chemistry: Volume I - gas phase reactions of O x , HO x , NO x and SO x species
Roger Atkinson,Donald L. Baulch,R. A. Cox,John Crowley,R. F. Hampson,R. G. Hynes,Michael E. Jenkin,Michel J. Rossi,J. Troe +8 more
TL;DR: In this article, the IUPAC Subcommittee on GasKinetic Data Evaluation for Atmospheric Chemistry presented the first in the series, presenting kinetic and photochemical data evaluated by the committee.
Journal ArticleDOI
Formation of Secondary Organic Aerosols Through Photooxidation of Isoprene
Magda Claeys,Bim Graham,Gyorgy Vas,Wu Wang,Reinhilde Vermeylen,V. A. Pashynska,Jan Cafmeyer,Pascal Guyon,Meinrat O. Andreae,Paulo Artaxo,Willy Maenhaut +10 more
TL;DR: Detailed organic analysis of natural aerosols from the Amazonian rain forest showed considerable quantities of previously unobserved polar organic compounds, which were identified as a mixture of two diastereoisomeric 2-methyltetrols: 2-methylthreitol and 2- methylerythritol, which can be explained by OH radical–initiated photooxidation of isoprene.
Journal ArticleDOI
A New Time-of-Flight Aerosol Mass Spectrometer (TOF-AMS)—Instrument Description and First Field Deployment
Frank Drewnick,Silke S. Hings,Peter F. DeCarlo,John T. Jayne,Marc Gonin,Katrin Fuhrer,S. Weimer,Jose L. Jimenez,Kenneth L. Demerjian,Stephan Borrmann,Douglas R. Worsnop +10 more
TL;DR: In this article, the authors report the development and first field deployment of a new version of the AMS, which is capable of measuring non-refractory aerosol mass concentrations, chemically speciated mass distributions and single particle information.
Journal ArticleDOI
Formation of 2-methyl tetrols and 2-methylglyceric acid in secondary organic aerosol from laboratory irradiated isoprene/NOX/SO2/air mixtures and their detection in ambient PM2.5 samples collected in the eastern United States
Edward O. Edney,Tadeusz E. Kleindienst,Mohammed Jaoui,Michael Lewandowski,John H. Offenberg,Wu Wang,Magda Claeys +6 more
TL;DR: In this article, an isoprene/NO X /air mixture was irradiated in a flow reactor smog chamber in both the absence and presence of SO 2 to measure the SOA yield and to establish whether the two 2-methyl tetrols and 2methyl glyceric acid are present in isoprane SOA and could serve as SOA indicator compounds.
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