1.
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Influence of temperature on the molecular composition of ions and charged clusters during pure biogenic nucleation
/ Frege, Carla (PSI, Villigen) ; Ortega, Ismael K ; Rissanen, Matti P ; Praplan, Arnaud P ; Steiner, Gerhard ; Heinritzi, Martin ; Ahonen, Lauri ; Amorim, António ; Bernhammer, Anne-Kathrin ; Bianchi, Federico et al.
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. The biogenic HOMs were produced from ozonolysis of α-pinene at 5 °C. [...]
2018 - 15 p.
- Published in : Atmos. Chem. Phys. 18 (2018) 65-79
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2.
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The role of ions in new particle formation in the CLOUD chamber
/ Wagner, Robert ; Yan, Chao ; Lehtipalo, Katrianne ; Duplissy, Jonathan ; Nieminen, Tuomo ; Kangasluoma, Juha ; Ahonen, Lauri R ; Dada, Lubna ; Kontkanen, Jenni ; Manninen, Hanna E (CERN) et al.
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 formation, but quantifying their effect in the atmosphere remains challenging. [...]
2017 - 17 p.
- Published in : Atmos. Chem. Phys. 17 (2017) 15181-15197
Fulltext: PDF; External link: Fulltext
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3.
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Role of iodine oxoacids in atmospheric aerosol nucleation
/ He, Xu-Cheng (Helsinki U.) ; Tham, Yee Jun (Helsinki U.) ; Dada, Lubna (Helsinki U.) ; Wang, Mingyi (Carnegie Mellon U.) ; Finkenzeller, Henning (U. Colorado, Boulder) ; Stolzenburg, Dominik (Vienna U. ; Helsinki U.) ; Iyer, Siddharth (Tampere U. of Tech.) ; Simon, Mario (Frankfurt U., FIAS) ; Kürten, Andreas (Frankfurt U., FIAS) ; Shen, Jiali (Helsinki U.) et al.
Iodic acid (HIO3) is known to form aerosol particles in coastal marine regions, but predicted nucleation and growth rates are lacking. Using the CERN CLOUD (Cosmics Leaving Outdoor Droplets) chamber, we find that the nucleation rates of HIO3 particles are rapid, even exceeding sulfuric acid–ammonia rates under similar conditions. [...]
2021 - 7 p.
- Published in : Science 371 (2021) 589-595
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4.
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Multicomponent new particle formation from sulfuric acid, ammonia, and biogenic vapors
/ Lehtipalo, Katrianne (U. Helsinki (main) ; PSI, Villigen ; Finnish Meteorological Inst.) ; Yan, Chao (U. Helsinki (main)) ; Dada, Lubna (U. Helsinki (main)) ; Bianchi, Federico (U. Helsinki (main)) ; Xiao, Mao (PSI, Villigen) ; Wagner, Robert (U. Helsinki (main)) ; Stolzenburg, Dominik (Vienna U.) ; Ahonen, Lauri R (U. Helsinki (main)) ; Amorim, Antonio (Lisbon, CENTRA ; Lisbon U.) ; Baccarini, Andrea (PSI, Villigen) et al.
A major fraction of atmospheric aerosol particles, which affect both air quality and climate, form from gaseous precursors in the atmosphere. Highly oxygenated organic molecules (HOMs), formed by oxidation of biogenic volatile organic compounds, are known to participate in particle formation and growth. [...]
2018 - 10 p.
- Published in : Sci. Adv. 4 (2018) eaau5363
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5.
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New particle formation from isoprene under upper-tropospheric conditions
/ Shen, Jiali (Helsinki U.) ; Russell, Douglas M (Frankfurt U., FIAS) ; DeVivo, Jenna (Carnegie Mellon U.) ; Kunkler, Felix (Mainz, Max Planck Inst.) ; Baalbaki, Rima (Helsinki U.) ; Mentler, Bernhard (Innsbruck U.) ; Scholz, Wiebke (Innsbruck U.) ; Yu, Wenjuan (Helsinki U.) ; Caudillo-Plath, Lucía (Frankfurt U., FIAS) ; Sommer, Eva (CERN ; Vienna U.) et al.
Abstract
Aircraft observations have revealed ubiquitous new particle formation in the tropical upper troposphere over the Amazon1,2 and the Atlantic and Pacific oceans3,4. Although the vapours involved remain unknown, recent satellite observations have revealed surprisingly high night-time isoprene mixing ratios of up to 1 part per billion by volume (ppbv) in the tropical upper troposphere5. [...]
2024 - 9 p.
- Published in : Nature 636 (2024) 115-123
Fulltext: PDF; External link: Interactions.org
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6.
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Ion-induced nucleation of pure biogenic particles
/ Kirkby, Jasper (Goethe U., Frankfurt (main) ; CERN) ; Duplissy, Jonathan (Helsinki U. ; Helsinki Inst. of Phys.) ; Sengupta, Kamalika (U. Leeds (main)) ; Frege, Carla (PSI, Villigen) ; Gordon, Hamish (CERN) ; Williamson, Christina (Goethe U., Frankfurt (main)) ; Heinritzi, Martin (Goethe U., Frankfurt (main) ; Innsbruck U.) ; Simon, Mario (Goethe U., Frankfurt (main)) ; Yan, Chao (Helsinki U.) ; Almeida, João (Goethe U., Frankfurt (main) ; CERN) et al.
Atmospheric aerosols and their effect on clouds are thought to be important for anthropogenic radiative forcing of the climate, yet remain poorly understood. Globally, around half of cloud condensation nuclei originate from nucleation of atmospheric vapours. [...]
2016
- Published in : Nature 533 (2016) 521-526
NPG Open Access article: PDF;
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7.
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Rapid growth of new atmospheric particles by nitric acid and ammonia condensation
/ Wang, Mingyi (Carnegie Mellon U.) ; Kong, Weimeng (Caltech) ; Marten, Ruby (PSI, Villigen) ; He, Xu-Cheng (Helsinki U.) ; Chen, Dexian (Carnegie Mellon U.) ; Pfeifer, Joschka (CERN) ; Heitto, Arto (Kuopio U.) ; Kontkanen, Jenni (Helsinki U.) ; Dada, Lubna (Helsinki U.) ; Kürten, Andreas (Goethe U., Frankfurt (main)) et al.
Measurements in the CLOUD chamber at CERN show that the rapid condensation of ammonia and nitric acid vapours could be important for the formation and survival of new particles in wintertime urban conditions, contributing to urban smog..
2020 - 20 p.
- Published in : Nature 581 (2020) 184-189
Fulltext from Publisher: PDF;
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8.
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An intercomparison study of four different techniques for measuring the chemical composition of nanoparticles
/ Caudillo, Lucía (Frankfurt U., FIAS ; Frankfurt U.) ; Surdu, Mihnea (PSI, Villigen) ; Lopez, Brandon (Carnegie Mellon U.) ; Wang, Mingyi (Carnegie Mellon U. ; Caltech) ; Thoma, Markus (Frankfurt U., FIAS ; Frankfurt U.) ; Bräkling, Steffen (LLNL, Livermore) ; Buchholz, Angela (Aalto U.) ; Simon, Mario (Frankfurt U., FIAS ; Frankfurt U.) ; Wagner, Andrea C (Frankfurt U., FIAS ; Frankfurt U.) ; Müller, Tatjana (Frankfurt U., FIAS ; Frankfurt U. ; Mainz, Max Planck Inst.) et al.
Currently, the complete chemical characterization of nanoparticles
(< 100 nm) represents an analytical challenge, since these particles
are abundant in number but have negligible mass. Several methods for
particle-phase characterization have been recently developed to better
detect and infer more accurately the sources and fates of sub-100 nm
particles, but a detailed comparison of different approaches is missing.
Here we report on the chemical composition of secondary organic aerosol
(SOA) nanoparticles from experimental studies of α-pinene ozonolysis
at −50, −30, and −10 ∘C and intercompare the results measured by different
techniques. [...]
2023 - 19 p.
- Published in : Atmos. Chem. Phys. 23 (2023) 6613-6631
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9.
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Synergistic HNO$_{3}$–H$_{2}$SO$_{4}$–NH$_{3}$ upper tropospheric particle formation
/ Wang, Mingyi ; Xiao, Mao ; Bertozzi, Barbara ; Marie, Guillaume ; Rörup, Birte ; Schulze, Benjamin ; Bardakov, Roman ; He, Xu-Cheng ; Shen, Jiali ; Scholz, Wiebke et al.
New particle formation in the upper free troposphere is a major global source of cloud condensation nuclei (CCN). However, the precursor vapours that drive the process are not well understood. [...]
2022 - 7 p.
- Published in : Nature 605 (2022) 483-489
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10.
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Molecular Composition and Volatility of Nucleated Particles from $\alpha$-Pinene Oxidation between −50 °C and +25 °C
/ Ye, Qing (Carnegie Mellon U. (main)) ; Wang, Mingyi (Carnegie Mellon U. (main)) ; Hofbauer, Victoria (Carnegie Mellon U. (main)) ; Stolzenburg, Dominik (Vienna U.) ; Chen, Dexian (Carnegie Mellon U. (main)) ; Schervish, Meredith (Carnegie Mellon U. (main)) ; Vogel, Alexander (CERN ; Goethe U., Frankfurt (main)) ; Mauldin, Roy L (Carnegie Mellon U. (main) ; U. Colorado, Boulder) ; Baalbaki, Rima (U. Helsinki (main)) ; Brilke, Sophia (Vienna U.) et al.
We use a real-time temperature-programmed desorption chemical-ionization mass spectrometer (FIGAERO–CIMS) to measure particle-phase composition and volatility of nucleated particles, studying pure α-pinene oxidation over a wide temperature range (−50 °C to +25 °C) in the CLOUD chamber at CERN. Highly oxygenated organic molecules are much more abundant in particles formed at higher temperatures, shifting the compounds toward higher O/C and lower intrinsic (300 K) volatility. [...]
2019 - 9 p.
- Published in : Environmental Science & Technology 53 (2019) 12357-12365
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