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Low temperature growth of sub 10 nm particles by ammonium nitrate condensation
/ Donahue, Neil M (Carnegie Mellon U.) ; Xiao, Mao (PSI, Villigen) ; Marten, Ruby (PSI, Villigen) ; Wang, Mingyi (Carnegie Mellon U. ; PSI, Villigen) ; Kong, Weimeng (Caltech) ; Schervish, Meredith (Carnegie Mellon U. ; UC, Irvine) ; Ye, Qing (Carnegie Mellon U.) ; Hofbauer, Victoria (Carnegie Mellon U.) ; Dada, Lubna (PSI, Villigen) ; Duplissy, Jonathan (Helsinki U.) et al.
Co-condensation of nitric acid and ammonia vapors to form ammonium nitrate transforms from a fully semi-volatile behavior when it is relatively warm (273 K and above, typical of the seasonal planetary boundary layer) into effectively non-volatile and irreversible uptake for the limiting vapor when it is cold (well below 273 K, typical of the upper troposphere and occasionally the wintertime boundary layer). This causes the system to switch in character from the one governed by semi-volatile equilibrium (how it is usually portrayed) to the one governed by irreversible reactive uptake to even the smallest particles. [...]
2025 - 15 p.
- Published in : Environmental Science: Atmospheres 5 (2025) 67-81
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2.
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Earth’s atmosphere protects the biosphere from nearby supernovae
/ Christoudias, Theodoros (Cyprus Inst.) ; Kirkby, Jasper (CERN) ; Stolzenburg, Dominik (TU Vienna) ; Pozzer, Andrea (Cyprus Inst.) ; Sommer, Eva (Vienna U.) ; Brasseur, Guy P (NCAR, Boulder) ; Kulmala, Markku (Helsinki U.) ; Lelieveld, Jos (Cyprus Inst.)
AbstractGeological evidence indicates that a supernova within 100 parsecs of Earth occurs around once per million years. Such nearby supernovas can produce an intense gamma-ray burst and a 100-fold increase of cosmic rays, lasting several centuries. [...]
2024 - 8 p.
- Published in : Communications Earth & Environment 5 (2024) 326
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3.
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Interactions of peroxy radicals from monoterpene and isoprene oxidation simulated in the radical volatility basis set
/ Schervish, Meredith (Carnegie Mellon U. ; UC, Irvine (main)) ; Heinritzi, Martin (Frankfurt U.) ; Stolzenburg, Dominik (Vienna U. ; Vienna U., Dept. Math.) ; Dada, Lubna (PSI, Villigen) ; Wang, Mingyi (Carnegie Mellon U. ; Chicago U.) ; Ye, Qing (Carnegie Mellon U. ; NCAR, Boulder) ; Hofbauer, Victoria (Carnegie Mellon U.) ; DeVivo, Jenna (Carnegie Mellon U.) ; Bianchi, Federico (Helsinki U. ; Helsinki Inst. of Phys.) ; Brilke, Sophia (Vienna U.) et al.
Isoprene affects new particle formation rates in environments and experiments also containing monoterpenes. For the most part, isoprene reduces particle formation rates, but the reason is debated. [...]
2024 - 14 p.
- Published in : Environ. Sci. Atmos 4 (2024) 740-753
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4.
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Temperature, humidity, and ionisation effect of iodine oxoacid nucleation
/ Rörup, Birte (Helsinki U.) ; He, Xu-Cheng (Helsinki U. ; Cambridge U. (main)) ; Shen, Jiali (Helsinki U.) ; Baalbaki, Rima (Helsinki U.) ; Dada, Lubna (Helsinki U. ; PSI, Villigen) ; Sipilä, Mikko (Helsinki U.) ; Kirkby, Jasper (CERN ; Frankfurt U., FIAS) ; Kulmala, Markku (Helsinki U. ; Nanjing U. (main)) ; Amorim, Antonio (Lisbon, CENTRA) ; Baccarini, Andrea (Ecole Polytechnique, Lausanne) et al.
Iodine oxoacids are recognised for their significant contribution to the formation of new particles in marine and polar atmospheres. Nevertheless, to incorporate the iodine oxoacid nucleation mechanism into global simulations, it is essential to comprehend how this mechanism varies under various atmospheric conditions. [...]
2024 - 16 p.
- Published in : Environ. Sci. Atmos. 4 (2024) 531-546
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Assessing the importance of nitric acid and ammonia for particle growth in the polluted boundary layer
/ Marten, Ruby (PSI, Villigen) ; Xiao, Mao (Caltech) ; Wang, Mingyi (Caltech) ; Kong, Weimeng (Caltech) ; He, Xu-Cheng (Helsinki U. ; Finnish Meteorological Inst.) ; Stolzenburg, Dominik (Vienna U. ; Helsinki U.) ; Pfeifer, Joschka (Frankfurt U. ; CERN) ; Marie, Guillaume (Frankfurt U.) ; Wang, Dongyu S (Caltech) ; Elser, Miriam (PSI, Villigen) et al.
Aerosols formed and grown by gas-to-particle processes are a major contributor to smog and haze in megacities, despite the competition between growth and loss rates. Rapid growth rates from ammonium nitrate formation have the potential to sustain particle number in typical urban polluted conditions [...]
2024 - 10 p.
- Published in : Environ. Sci. Atmos. 4 (2024) 265-274
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Potential pre-industrial–like new particle formation induced by pure biogenic organic vapors in Finnish peatland
/ Huang, Wei (Helsinki U.) ; Junninen, Heikki (Tartu, Inst. Phys.) ; Garmash, Olga (Tampere U. of Tech. ; Washington U., Seattle) ; Lehtipalo, Katrianne (Helsinki U.) ; Stolzenburg, Dominik (TU Vienna) ; Lampilahti, Janne L P (Helsinki U.) ; Ezhova, Ekaterina (Helsinki U.) ; Schallhart, Simon (STUK, Helsinki) ; Rantala, Pekka (Helsinki U.) ; Aliaga, Diego (Helsinki U.) et al.
Pure biogenic new particle formation (NPF) induced by highly oxygenated organic molecules (HOMs) could be an important mechanism for pre-industrial aerosol formation. However, it has not been unambiguously confirmed in the ambient due to the scarcity of truly pristine continental locations in the present-day atmosphere or the lack of chemical characterization of NPF precursors. [...]
2024 - 11 p.
- Published in : Sci. Adv. 10 (2024) adm9191
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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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Measurement of the collision rate coefficients between atmospheric ions and multiply charged aerosol particles in the CERN CLOUD chamber
/ Pfeifer, Joschka (CERN ; Frankfurt U.) ; Mahfouz, Naser G A (Carnegie Mellon U. ; Princeton U.) ; Schulze, Benjamin C (Caltech) ; Mathot, Serge (CERN) ; Stolzenburg, Dominik (Helsinki U.) ; Baalbaki, Rima (Helsinki U.) ; Brasseur, Zoé (Helsinki U.) ; Caudillo, Lucia (Frankfurt U., FIAS ; Frankfurt U.) ; Dada, Lubna (PSI, Villigen) ; Granzin, Manuel (Frankfurt U., FIAS ; Frankfurt U.) et al.
Aerosol particles have an important role in Earth's
radiation balance and climate, both directly and indirectly through
aerosol–cloud interactions. Most aerosol particles in the atmosphere are
weakly charged, affecting both their collision rates with ions and neutral
molecules, as well as the rates by which they are scavenged by other aerosol
particles and cloud droplets. [...]
2023 - 16 p.
- Published in : Atmos. Chem. Phys. 23 (2023) 6703-6718
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Iodine oxoacids enhance nucleation of sulfuric acid particles in the atmosphere
/ He, Xu-Cheng (Helsinki U. ; Carnegie Mellon U. ; Helsinki Inst. of Phys.) ; Simon, Mario (Frankfurt U., FIAS ; Frankfurt U.) ; Iyer, Siddharth (Tampere U. of Tech.) ; Xie, Hong-Bin (Shanghai Jiao Tong U.) ; Rörup, Birte (Helsinki U.) ; Shen, Jiali (Helsinki U.) ; Finkenzeller, Henning (Colorado U. ; Colorado U., CIRES) ; Stolzenburg, Dominik (Helsinki U. ; Vienna U.) ; Zhang, Rongjie (Shanghai Jiao Tong U.) ; Baccarini, Andrea (PSI, Villigen ; Ecole Polytechnique, Lausanne) et al.
The main nucleating vapor in the atmosphere is thought to be sulfuric acid (H2SO4), stabilized by ammonia (NH3). However, in marine and polar regions, NH3 is generally low, and H2SO4 is frequently found together with iodine oxoacids [HIOx, i.e., iodic acid (HIO3) and iodous acid (HIO2)]. [...]
2023 - 7 p.
- Published in : Science 382 (2023) adh2526
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10.
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Role of sesquiterpenes in biogenic new particle formation
/ Dada, Lubna (PSI, Villigen ; Helsinki U.) ; Stolzenburg, Dominik (Helsinki U. ; Vienna U. ; TU Vienna) ; Simon, Mario (Frankfurt U.) ; Fischer, Lukas (Innsbruck U.) ; Heinritzi, Martin (Frankfurt U.) ; Wang, Mingyi (Carnegie Mellon U. ; Caltech) ; Xiao, Mao (PSI, Villigen) ; Vogel, Alexander L (Frankfurt U.) ; Ahonen, Lauri (Helsinki U.) ; Amorim, Antonio (Lisbon U.) et al.
Biogenic vapors form new particles in the atmosphere, affecting global climate. The contributions of monoterpenes and isoprene to new particle formation (NPF) have been extensively studied. [...]
2023 - 14 p.
- Published in : Sci. Adv. 9 (2023) adi5297
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