2026-01-27
07:46 |
Global impact of anthropogenic NH3 emissions on upper tropospheric aerosol formation
/ Xenofontos, Christos (Cyprus Inst.) ; Kohl, Matthias (Mainz, Max Planck Inst.) ; Ruhl, Samuel (Mainz, Max Planck Inst.) ; Almeida, João (CERN) ; Caudillo-Plath, Lucía (Goethe U., Frankfurt (main)) ; Cruz-Simbron, Romulo (U. Colorado, Boulder) ; Dada, Lubna (PSI, Villigen) ; Duplissy, Jonathan (U. Helsinki (main)) ; Ehrhart, Sebastian (Mainz, Max Planck Inst.) ; Finkenzeller, Henning (U. Helsinki (main)) et al.
Anthropogenic ammonia (NH3) emissions have significantly increased in recent decades due to enhanced agricultural activities, contributing to global air pollution. While the effects of NH3 on surface air quality are well documented, its influence on particle dynamics in the upper troposphere-lower stratosphere (UTLS) and related aerosol impacts remain unquantified. [...]
2025 - 10 p.
- Published in : Proc. Natl. Acad. Sci. U. S. A. 122 (2025) e2506658122
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2025-10-28
09:22 |
Isoprene chemistry under upper-tropospheric conditions
/ Russell, Douglas M (Goethe U., Frankfurt (main)) ; Kunkler, Felix (Mainz, Max Planck Inst.) ; Shen, Jiali (U. Helsinki (main)) ; Kohl, Matthias (Mainz, Max Planck Inst.) ; DeVivo, Jenna (Carnegie Mellon U. (main)) ; Bhattacharyya, Nirvan (Carnegie Mellon U. (main)) ; Xenofontos, Christos (Cyprus Inst.) ; Klebach, Hannah (Goethe U., Frankfurt (main)) ; Caudillo-Plath, Lucía (Goethe U., Frankfurt (main)) ; Simon, Mario (Goethe U., Frankfurt (main)) et al.
Isoprene (C$_{5}$H$_{8}$) is the non-methane hydrocarbon with the highest emissions to the atmosphere. It is mainly produced by vegetation, especially broad-leaved trees, and efficiently transported to the upper troposphere in deep convective clouds, where it is mixed with lightning NO$_{x}$. [...]
2025 - 14 p.
- Published in : Nature Commun. 16 (2025) 8555
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2025-06-03
07:51 |
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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2025-06-03
07:51 |
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.)
Geological 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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2025-05-31
06:51 |
Ammonium CI-Orbitrap: a tool for characterizing the reactivity of oxygenated organic molecules
/ Li, Dandan (Lyon, IPN) ; Wang, Dongyu (PSI, Villigen) ; Caudillo, Lucia (Frankfurt U., FIAS) ; Scholz, Wiebke ; Wang, Mingyi ; Tomaz, Sophie (Lyon, IPN) ; Marie, Guillaume (Frankfurt U., FIAS) ; Surdu, Mihnea (PSI, Villigen) ; Eccli, Elias ; Gong, Xianda et al.
Abstract. Oxygenated organic molecules (OOMs) play an important role in the formation of atmospheric aerosols [...]
2024 - 16 p.
- Published in : Atmos. Meas. Tech. 17 (2024) 5413-5428
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2025-05-29
08:37 |
The impact of ammonia on particle formation in the Asian Tropopause Aerosol Layer
/ Xenofontos, Christos (Cyprus Inst.) ; Kohl, Matthias (Mainz, Max Planck Inst.) ; Ruhl, Samuel (Mainz, Max Planck Inst.) ; Almeida, João (CERN ; Lisbon U.) ; Beckmann, Hannah M (Tartu U.) ; Caudillo-Plath, Lucía (Goethe U., Frankfurt (main)) ; Ehrhart, Sebastian (Mainz, Max Planck Inst.) ; Höhler, Kristina (KIT, Karlsruhe) ; Kaniyodical Sebastian, Milin (KIT, Karlsruhe) ; Kong, Weimeng (CIT-USC) et al.
AbstractDuring summer, ammonia emissions in Southeast Asia influence air pollution and cloud formation. Convective transport by the South Asian monsoon carries these pollutant air masses into the upper troposphere and lower stratosphere (UTLS), where they accumulate under anticyclonic flow conditions. [...]
2024 - 12 p.
- Published in : Climate. Atmos. Sci. 7 (2024) 215
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2025-05-29
08:37 |
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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2025-05-28
07:13 |
Nitrate Radicals Suppress Biogenic New Particle Formation from Monoterpene Oxidation
/ Li, Dandan (IRC, Villeurbanne) ; Huang, Wei (U. Helsinki (main)) ; Wang, Dongyu (PSI, Villigen) ; Wang, Mingyi (Carnegie Mellon U. ; Caltech, Pasadena (main)) ; Thornton, Joel A (U. Washington, Seattle (main)) ; Caudillo, Lucía (Goethe U., Frankfurt (main)) ; Rörup, Birte (U. Helsinki (main)) ; Marten, Ruby (PSI, Villigen) ; Scholz, Wiebke (Innsbruck U.) ; Finkenzeller, Henning (U. Colorado, Boulder) et al.
Highly oxygenated organic molecules (HOMs) are a major source of new particles that affect the Earth’s climate. HOM production from the oxidation of volatile organic compounds (VOCs) occurs during both the day and night and can lead to new particle formation (NPF). [...]
2024 - 14 p.
- Published in : Environ. Sci. Technol. 58 (2024) 1601-1614
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2025-05-27
07:15 |
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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2025-05-27
07:14 |
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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