|
1.
|
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
Fulltext: PDF;
|
|
|
2.
|
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
Fulltext: PDF;
|
|
|
3.
|
e-book
|
|
4.
|
Molecular Understanding of the Enhancement in Organic Aerosol Mass at High Relative Humidity
/ Surdu, Mihnea ; Lamkaddam, Houssni ; Wang, Dongyu S ; Bell, David M ; Xiao, Mao ; Lee, Chuan Ping ; Li, Dandan ; Caudillo, Lucía ; Marie, Guillaume ; Scholz, Wiebke et al.
The mechanistic pathway by which high relative humidity (RH) affects gas–particle partitioning remains poorly understood, although many studies report increased secondary organic aerosol (SOA) yields at high RH. Here, we use real-time, molecular measurements of both the gas and particle phase to provide a mechanistic understanding of the effect of RH on the partitioning of biogenic oxidized organic molecules (from α-pinene and isoprene) at low temperatures (243 and 263 K) at the CLOUD chamber at CERN. [...]
2023 - 13 p.
- Published in : Environ. Sci. Technol. 57 (2023) 2297-2309
Fulltext: PDF;
|
|
|
5.
|
|
|
6.
|
Status of the muEDM Experiment at PSI
/ Khaw, Kim Siang (Shanghai Jiao Tong U.) ; Chen, Cheng (Shanghai Jiao Tong U.) ; Giovannozzi, Massimo (CERN) ; Hu, Tianqi (Shanghai Jiao Tong U.) ; Lv, Meng (Shanghai Jiao Tong U.) ; Ng, Jun Kai (Shanghai Jiao Tong U.) ; Papa, Angela (Shanghai Jiao Tong U.) ; Schmidt-Wellenburg, Philipp (PSI, Villigen ; INFN, Pisa ; Pisa U.) ; Vitali, Bastiano (PSI, Villigen ; INFN, Pisa ; Rome U.) ; Wong, Guan Ming (Shanghai Jiao Tong U.)
/PSI muEDM Collaboration
Permanent electric dipole moments (EDMs) are excellent probes of physics beyond the Standard Model, especially on new sources of CP violation. The muon EDM has recently attracted significant attention due to discrepancies in the magnetic anomaly of the muon, as well as potential violations of lepton-flavor universality in B-meson decays. [...]
arXiv:2307.01535.-
2023-09-04 - 7 p.
- Published in : Phys. Sci. Forum: 8 (2023) , no. 1, pp. 50
Fulltext: document - PDF; 2307.01535 - PDF;
In : 23rd International Workshop on Neutrinos from Accelerators (NuFact 2022), Snowbird, Salt Lake City, Utah, United States, 30 Jul - 6 Aug 2022, pp.50
|
|
|
7.
|
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
Fulltext: PDF;
|
|
|
8.
|
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
Fulltext: PDF;
|
|
|
9.
|
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
Fulltext: PDF;
|
|
|
10.
|
Molecular characterization of ultrafine particles using extractive electrospray time-of-flight mass spectrometry
/ Surdu, Mihnea (PSI, Villigen) ; Pospisilova, Veronika (PSI, Villigen) ; Xiao, Mao (PSI, Villigen) ; Wang, Mingyi (Carnegie Mellon U.) ; Mentler, Bernhard (Innsbruck U.) ; Simon, Mario (Frankfurt U., FIAS ; Frankfurt U.) ; Stolzenburg, Dominik (Vienna U., Dept. Math. ; Helsinki U.) ; Hoyle, Christopher R (PSI, Villigen ; Zurich, ETH) ; Bell, David M (PSI, Villigen) ; Lee, Chuan Ping (PSI, Villigen) et al.
Aerosol particles negatively affect human health while also having climatic relevance due to, for example, their ability to act as cloud condensation nuclei. Ultrafine particles (diameter D$_p$ < 100 nm) typically comprise the largest fraction of the total number concentration, however, their chemical characterization is difficult because of their low mass. [...]
2021 - 15 p.
- Published in : Environmental Science: Atmospheres 1 (2021) 434-448
Fulltext: PDF;
|
|