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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
Manuscript: PDF;
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2.
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The gas-phase formation mechanism of iodic acid as an atmospheric aerosol source
/ Finkenzeller, Henning (Colorado U. ; Colorado U., CIRES) ; Iyer, Siddharth (Tampere U. of Tech.) ; He, Xu-Cheng (Helsinki U.) ; Simon, Mario (Goethe U., Frankfurt (main)) ; Koenig, Theodore K (Colorado U. ; Colorado U., CIRES ; Peking U., Beijing) ; Lee, Christopher F (Colorado U. ; Colorado U., CIRES) ; Valiev, Rashid (Helsinki U.) ; Hofbauer, Victoria (Carnegie Mellon U.) ; Amorim, Antonio (Lisbon U.) ; Baalbaki, Rima (Helsinki U.) et al.
AbstractIodine is a reactive trace element in atmospheric chemistry that destroys ozone and nucleates particles. Iodine emissions have tripled since 1950 and are projected to keep increasing with rising O3 surface concentrations. [...]
2022 - 7 p.
- Published in : Nature Chem. 15 (2022) 129-135
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3.
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High Gas-Phase Methanesulfonic Acid Production in the OH-Initiated Oxidation of Dimethyl Sulfide at Low Temperatures
/ Shen, Jiali ; Scholz, Wiebke ; He, Xu-Cheng ; Zhou, Putian ; Marie, Guillaume ; Wang, Mingyi ; Marten, Ruby ; Surdu, Mihnea ; Rörup, Birte ; Baalbaki, Rima et al.
Dimethyl sulfide (DMS) influences climate via cloud condensation nuclei (CCN) formation resulting from its oxidation products (mainly
methanesulfonic acid, MSA, and sulfuric acid, H2SO4). Despite their importance,
accurate prediction of MSA and H2SO4 from DMS oxidation remains
challenging. [...]
2022 - 14 p.
- Published in : Environ. Sci. Technol. 56 (2022) 13931-13944
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4.
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Survival of newly formed particles in haze conditions
/ Marten, Ruby (PSI, Villigen) ; Xiao, Mao (PSI, Villigen) ; Rorup, Birte (Helsinki U.) ; Wang, Mingyi (Carnegie Mellon U.) ; Kong, Weimeng (Caltech) ; He, Xu-Cheng (Helsinki U.) ; Stolzenburg, Dominik (Helsinki U.) ; Pfeifer, Joschka (CERN ; Frankfurt U., FIAS ; Frankfurt U.) ; Marie, Guillaume (Frankfurt U., FIAS ; Frankfurt U.) ; Wang, Dongyu S (PSI, Villigen) et al.
Intense new particle formation events are regularly observed under highly polluted conditions, despite the high loss rates of nucleated clusters. Higher than expected cluster survival probability implies either ineffective scavenging by pre-existing particles or missing growth mechanisms. [...]
2022 - 9 p.
- Published in : Environmental Science: Atmospheres 2 (2022) 491-499
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5.
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Chemical composition of nanoparticles from α-pinene nucleation and the influence of isoprene and relative humidity at low temperature
/ Caudillo, Lucía (Frankfurt U.) ; Rörup, Birte (Helsinki U.) ; Heinritzi, Martin (Frankfurt U.) ; Marie, Guillaume (Frankfurt U.) ; Simon, Mario (Frankfurt U.) ; Wagner, Andrea C (U. Colorado, Boulder) ; Müller, Tatjana (Frankfurt U. ; Mainz, Max Planck Inst.) ; Granzin, Manuel (Frankfurt U.) ; Amorim, Antonio (Lisbon U.) ; Ataei, Farnoush (TROPOS, Leibniz) et al.
Biogenic organic precursors play an important role
in atmospheric new particle formation (NPF). One of the major precursor species is α-pinene, which upon oxidation can
form a suite of products covering a wide range of volatilities.
Highly oxygenated organic molecules (HOMs) comprise a
fraction of the oxidation products formed [...]
2021 - 16 p.
- Published in : Atmos. Chem. Phys. 21 (2021) 17099-17114
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6.
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Enhanced growth rate of atmospheric particles from sulfuric acid
/ Stolzenburg, Dominik (Vienna U. ; Helsinki U.) ; Simon, Mario (Frankfurt U.) ; Ranjithkumar, Ananth (Leeds U.) ; Kürten, Andreas (Frankfurt U.) ; Lehtipalo, Katrianne (Helsinki U. ; Finnish Meteorological Inst.) ; Gordon, Hamish (Leeds U.) ; Ehrhart, Sebastian (Mainz, Max Planck Inst.) ; Finkenzeller, Henning (U. Colorado, Boulder) ; Pichelstorfer, Lukas (Helsinki U.) ; Nieminen, Tuomo (Helsinki U.) et al.
In the present-day atmosphere, sulfuric acid is the
most important vapour for aerosol particle formation and initial growth. However, the growth rates of nanoparticles ( <
10 nm) from sulfuric acid remain poorly measured. [...]
2020 - 14 p.
- Published in : Atmos. Chem. Phys. 20 (2020) 7359-7372
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7.
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Molecular understanding of new-particle formation from $\alpha$-pinene between −50 and +25 °C
/ Simon, Mario (Frankfurt U.) ; Dada, Lubna (Helsinki U.) ; Heinritzi, Martin (Frankfurt U.) ; Scholz, Wiebke (Innsbruck U.) ; Stolzenburg, Dominik (Vienna U.) ; Fischer, Lukas (Innsbruck U.) ; Wagner, Andrea C (Frankfurt U. ; U. Colorado, Boulder) ; Kürten, Andreas (Frankfurt U.) ; Rörup, Birte (Helsinki U.) ; He, Xu-Cheng (Helsinki U.) et al.
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, gasphase autoxidation of volatile organic compounds (VOCs)
such as α-pinene, the most abundant monoterpene in the atmosphere. [...]
2020 - 25 p.
- Published in : Atmos. Chem. Phys. 20 (2020) 9183-9207
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8.
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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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9.
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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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