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Akademický článek

Evaluation of a reduced-pressure chemical ion reactor utilizing adduct ionization for the detection of gaseous organic and inorganic species

Autor: M. Riva, V. Pospisilova, C. Frege, S. Perrier, P. Bansal, S. Jorga, P. Sturm, J. A. Thornton, U. Rohner, F. Lopez-Hilfiker

Publikováno v: Atmospheric Measurement Techniques, Vol 17, Pp 5887-5901 (2024)

Volatile organic compounds (VOCs) and volatile inorganic compounds (VICs) provide critical information across many scientific fields including atmospheric chemistry and soil and biological processes. Chemical ionization (CI) mass spectrometry has bec

Externí odkaz: https://doaj.org/article/4d563b0f608a4ef2912b0706f5a2aa0f

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Akademický článek

Molecular understanding of the suppression of new-particle formation by isoprene

Autor: M. Heinritzi, L. Dada, M. Simon, D. Stolzenburg, A. C. Wagner, L. Fischer, L. R. Ahonen, S. Amanatidis, R. Baalbaki, A. Baccarini, P. S. Bauer, B. Baumgartner, F. Bianchi, S. Brilke, D. Chen, R. Chiu, A. Dias, J. Dommen, J. Duplissy, H. Finkenzeller, C. Frege, C. Fuchs, O. Garmash, H. Gordon, M. Granzin, I. El Haddad, X. He, J. Helm, V. Hofbauer, C. R. Hoyle, J. Kangasluoma, T. Keber, C. Kim, A. Kürten, H. Lamkaddam, T. M. Laurila, J. Lampilahti, C. P. Lee, K. Lehtipalo, M. Leiminger, H. Mai, V. Makhmutov, H. E. Manninen, R. Marten, S. Mathot, R. L. Mauldin, B. Mentler, U. Molteni, T. Müller, W. Nie, T. Nieminen, A. Onnela, E. Partoll, M. Passananti, T. Petäjä, J. Pfeifer, V. Pospisilova, L. L. J. Quéléver, M. P. Rissanen, C. Rose, S. Schobesberger, W. Scholz, K. Scholze, M. Sipilä, G. Steiner, Y. Stozhkov, C. Tauber, Y. J. Tham, M. Vazquez-Pufleau, A. Virtanen, A. L. Vogel, R. Volkamer, R. Wagner, M. Wang, L. Weitz, D. Wimmer, M. Xiao, C. Yan, P. Ye, Q. Zha, X. Zhou, A. Amorim, U. Baltensperger, A. Hansel, M. Kulmala, A. Tomé, P. M. Winkler, D. R. Worsnop, N. M. Donahue, J. Kirkby, J. Curtius

Publikováno v: Atmospheric Chemistry and Physics, Vol 20, Pp 11809-11821 (2020)

Nucleation of atmospheric vapours produces more than half of global cloud condensation nuclei and so has an important influence on climate. Recent studies show that monoterpene (C10H16) oxidation yields highly oxygenated products that can nucleate wi

Externí odkaz: https://doaj.org/article/1582eecc07b7453a9e079d9b0aaaa34a

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Akademický článek

Molecular understanding of new-particle formation from α-pinene between −50 and +25 °C

Autor: M. Simon, L. Dada, M. Heinritzi, W. Scholz, D. Stolzenburg, L. Fischer, A. C. Wagner, A. Kürten, B. Rörup, X.-C. He, J. Almeida, R. Baalbaki, A. Baccarini, P. S. Bauer, L. Beck, A. Bergen, F. Bianchi, S. Bräkling, S. Brilke, L. Caudillo, D. Chen, B. Chu, A. Dias, D. C. Draper, J. Duplissy, I. El-Haddad, H. Finkenzeller, C. Frege, L. Gonzalez-Carracedo, H. Gordon, M. Granzin, J. Hakala, V. Hofbauer, C. R. Hoyle, C. Kim, W. Kong, H. Lamkaddam, C. P. Lee, K. Lehtipalo, M. Leiminger, H. Mai, H. E. Manninen, G. Marie, R. Marten, B. Mentler, U. Molteni, L. Nichman, W. Nie, A. Ojdanic, A. Onnela, E. Partoll, T. Petäjä, J. Pfeifer, M. Philippov, L. L. J. Quéléver, A. Ranjithkumar, M. P. Rissanen, S. Schallhart, S. Schobesberger, S. Schuchmann, J. Shen, M. Sipilä, G. Steiner, Y. Stozhkov, C. Tauber, Y. J. Tham, A. R. Tomé, M. Vazquez-Pufleau, A. L. Vogel, R. Wagner, M. Wang, D. S. Wang, Y. Wang, S. K. Weber, Y. Wu, M. Xiao, C. Yan, P. Ye, Q. Ye, M. Zauner-Wieczorek, X. Zhou, U. Baltensperger, J. Dommen, R. C. Flagan, A. Hansel, M. Kulmala, R. Volkamer, P. M. Winkler, D. R. Worsnop, N. M. Donahue, J. Kirkby, J. Curtius

Publikováno v: Atmospheric Chemistry and Physics, Vol 20, Pp 9183-9207 (2020)

Highly oxygenated organic molecules (HOMs) contribute substantially to the formation and growth of atmospheric aerosol particles, which affect air quality, human health and Earth's climate. HOMs are formed by rapid, gas-phase autoxidation of volatile

Externí odkaz: https://doaj.org/article/cd6a89fdefa44cc2a7737d2c81b3b521

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Akademický článek

Formation of highly oxygenated organic molecules from aromatic compounds

Autor: U. Molteni, F. Bianchi, F. Klein, I. El Haddad, C. Frege, M. J. Rossi, J. Dommen, U. Baltensperger

Publikováno v: Atmospheric Chemistry and Physics, Vol 18, Pp 1909-1921 (2018)

Anthropogenic volatile organic compounds (AVOCs) often dominate the urban atmosphere and consist to a large degree of aromatic hydrocarbons (ArHCs), such as benzene, toluene, xylenes, and trimethylbenzenes, e.g., from the handling and combustion o

Externí odkaz: https://doaj.org/article/0f2d2e7704d3436c8e7b35f68cd5b37b

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Akademický článek

Influence of temperature on the molecular composition of ions and charged clusters during pure biogenic nucleation

Publikováno v: Atmospheric Chemistry and Physics, Vol 18, Pp 65-79 (2018)

It was recently shown by the CERN CLOUD experiment that biogenic highly oxygenated molecules (HOMs) form particles under atmospheric conditions in the absence of sulfuric acid, where ions enhance the nucleation rate by 1–2 orders of magnitude. Th

Externí odkaz: https://doaj.org/article/d748ca897f3e41cdb5e17b9c28f207cd

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Akademický článek

The role of ions in new particle formation in the CLOUD chamber

Autor: R. Wagner, C. Yan, K. Lehtipalo, J. Duplissy, T. Nieminen, J. Kangasluoma, L. R. Ahonen, L. Dada, J. Kontkanen, H. E. Manninen, A. Dias, A. Amorim, P. S. Bauer, A. Bergen, A.-K. Bernhammer, F. Bianchi, S. Brilke, S. B. Mazon, X. Chen, D. C. Draper, L. Fischer, C. Frege, C. Fuchs, O. Garmash, H. Gordon, J. Hakala, L. Heikkinen, M. Heinritzi, V. Hofbauer, C. R. Hoyle, J. Kirkby, A. Kürten, A. N. Kvashnin, T. Laurila, M. J. Lawler, H. Mai, V. Makhmutov, R. L. Mauldin III, U. Molteni, L. Nichman, W. Nie, A. Ojdanic, A. Onnela, F. Piel, L. L. J. Quéléver, M. P. Rissanen, N. Sarnela, S. Schallhart, K. Sengupta, M. Simon, D. Stolzenburg, Y. Stozhkov, J. Tröstl, Y. Viisanen, A. L. Vogel, A. C. Wagner, M. Xiao, P. Ye, U. Baltensperger, J. Curtius, N. M. Donahue, R. C. Flagan, M. Gallagher, A. Hansel, J. N. Smith, A. Tomé, P. M. Winkler, D. Worsnop, M. Ehn, M. Sipilä, V.-M. Kerminen, T. Petäjä, M. Kulmala

Publikováno v: Atmospheric Chemistry and Physics, Vol 17, Pp 15181-15197 (2017)

The formation of secondary particles in the atmosphere accounts for more than half of global cloud condensation nuclei. Experiments at the CERN CLOUD (Cosmics Leaving OUtdoor Droplets) chamber have underlined the importance of ions for new particle

Externí odkaz: https://doaj.org/article/4d9e0fd2166b4e4793385a828d459319

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Akademický článek

Assessing the influence of NOx concentrations and relative humidity on secondary organic aerosol yields from α-pinene photo-oxidation through smog chamber experiments and modelling calculations

Autor: L. Stirnweis, C. Marcolli, J. Dommen, P. Barmet, C. Frege, S. M. Platt, E. A. Bruns, M. Krapf, J. G. Slowik, R. Wolf, A. S. H. Prévôt, U. Baltensperger, I. El-Haddad

Publikováno v: Atmospheric Chemistry and Physics, Vol 17, Iss 8, Pp 5035-5061 (2017)

Secondary organic aerosol (SOA) yields from the photo-oxidation of α-pinene were investigated in smog chamber (SC) experiments at low (23–29 %) and high (60–69 %) relative humidity (RH), various NOx ∕ VOC ratios (0.04–3.8) and with different

Externí odkaz: https://doaj.org/article/309e67a8d8ff45288f53e22f1263fb64

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Akademický článek

Chemical characterization of atmospheric ions at the high altitude research station Jungfraujoch (Switzerland)

Autor: C. Frege, F. Bianchi, U. Molteni, J. Tröstl, H. Junninen, S. Henne, M. Sipilä, E. Herrmann, M. J. Rossi, M. Kulmala, C. R. Hoyle, U. Baltensperger, J. Dommen

Publikováno v: Atmospheric Chemistry and Physics, Vol 17, Iss 4, Pp 2613-2629 (2017)

The ion composition at high altitude (3454 m a.s.l.) was measured with an atmospheric pressure interface time-of-flight mass spectrometer (APi-TOF) during a period of 9 months, from August 2013 to April 2014. The negative mass spectra were dominated

Externí odkaz: https://doaj.org/article/765e9e5bcf534e87858bceee47fe2c29

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