0000000000919128

AUTHOR

Jürgen Wildt

showing 2 related works from this author

The formation, properties and impact of secondary organic aerosol: Current and emerging issues

2009

Hallquist, M. Wenger, J. C. Baltensperger, U. Rudich, Y. Simpson, D. Claeys, M. Dommen, J. Donahue, N. M. George, C. Goldstein, A. H. Hamilton, J. F. Herrmann, H. Hoffmann, T. Iinuma, Y. Jang, M. Jenkin, M. E. Jimenez, J. L. Kiendler-Scharr, A. Maenhaut, W. McFiggans, G. Mentel, Th. F. Monod, A. Prevot, A. S. H. Seinfeld, J. H. Surratt, J. D. Szmigielski, R. Wildt, J.; Secondary organic aerosol (SOA) accounts for a significant fraction of ambient tropospheric aerosol and a detailed knowledge of the formation, properties and transformation of SOA is therefore required to evaluate its impact on atmospheric processes, climate and human health. The chemical and physical processes associated wit…

humic-like substancesAtmospheric Scienceenvironmental chamber data010504 meteorology & atmospheric sciences010501 environmental sciences01 natural sciencessupercritical-fluid extractionlcsh:Chemistrychemistry.chemical_compoundHuman healthddc:550catalyzed heterogeneous reactionsProcess engineeringairborne particulate matter0105 earth and related environmental sciencesTropospheric aerosolpolycyclic aromatic-hydrocarbonsinitiated atmospheric oxidationAtmospheric modelsbusiness.industryPharmacology. Therapy[CHIM.CATA] Chemical Sciences/Catalysis[CHIM.CATA]Chemical Sciences/Catalysischromatography-mass spectrometrylcsh:QC1-999JAerosolChemistrylcsh:QD1-999chemistry13. Climate actionEnvironmental chemistryEarth and Environmental Scienceslow-molecular-weightAerosol mass spectrometrytropospheric chemistry mechanismOrganic componentCurrent (fluid)/dk/atira/pure/subjectarea/asjc/1900/1902businesslcsh:PhysicsOrganosulfate
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Suppression of new particle formation from monoterpene oxidation by NO<sub>x</sub>

2014

Abstract. The impact of nitrogen oxides (NOx = NO + NO2) on new particle formation (NPF) and on photochemical ozone production from real plant volatile organic compound (BVOC) emissions was studied in a laboratory setup. At high NOx conditions ([BVOC] / [NOx] < 7, [NOx] > 23 ppb) new particle formation was suppressed. Instead, photochemical ozone formation was observed resulting in higher hydroxyl radical (OH) and lower nitrogen monoxide (NO) concentrations. When [NO] was reduced back to levels below 1 ppb by OH reactions, NPF was observed. Adding high amounts of NOx caused NPF to be slowed by orders of magnitude compared to analogous experiments at low NOx conditions ([NOx] ~300 ppt)…

chemistry.chemical_classificationAtmospheric Science010504 meteorology & atmospheric sciencesMonoterpeneRadicalPhotodissociation010501 environmental sciencesRate-determining stepPhotochemistry01 natural sciencesOrganic compoundchemistry.chemical_compoundchemistry13. Climate actionParticleHydroxyl radicalNOx0105 earth and related environmental sciencesAtmospheric Chemistry and Physics
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