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CERN Accelerating science

CERN Document Server 6 records found  Search took 1.43 seconds. 
1.
Rapid growth of organic aerosol nanoparticles over a wide tropospheric temperature range / Stolzenburg, Dominik (Vienna U.) ; Fischer, Lukas (Innsbruck U.) ; Vogel, Alexander L (Frankfurt U. ; CERN ; PSI, Villigen) ; Heinritzi, Martin (Frankfurt U.) ; Schervish, Meredith (Carnegie Mellon U.) ; Simon, Mario (Frankfurt U.) ; Wagner, Andrea C (Frankfurt U.) ; Dada, Lubna (Helsinki U.) ; Ahonen, Lauri R (Helsinki U.) ; Amorim, Antonio (Lisbon U. ; CMAF, Lisbon) et al.
Nucleation and growth of aerosol particles from atmospheric vapors constitutes a major source of global cloud condensation nuclei (CCN). The fraction of newly formed particles that reaches CCN sizes is highly sensitive to particle growth rates, especially for particle sizes <10 nm, where coagulation losses to larger aerosol particles are greatest. [...]
2018 - 6 p. - Published in : Proc. Natl. Acad. Sci. U. S. A. 115 (2018) 9122-9127
2.
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
3.
Measurement–model comparison of stabilized Criegee intermediate and highly oxygenated molecule production in the CLOUD chamber / Sarnela, Nina (U. Helsinki (main)) ; Jokinen, Tuija (U. Helsinki (main)) ; Duplissy, Jonathan (U. Helsinki (main)) ; Yan, Chao (U. Helsinki (main)) ; Nieminen, Tuomo (UEF, Kuopio) ; Ehn, Mikael (U. Helsinki (main)) ; Schobesberger, Siegfried (U. Helsinki (main) ; UEF, Kuopio ; U. Washington, Seattle (main)) ; Heinritzi, Martin (Goethe U., Frankfurt (main)) ; Ehrhart, Sebastian (Goethe U., Frankfurt (main)) ; Lehtipalo, Katrianne (U. Helsinki (main) ; PSI, Villigen) et al.
Atmospheric oxidation is an important phenomenon which produces large quantities of low-volatility compounds such as sulfuric acid and oxidized organic compounds. Such species may be involved in the nucleation of particles and enhance their subsequent growth to reach the size of cloud condensation nuclei (CCN). [...]
2018 - 18 p. - Published in : Atmos. Chem. Phys. 18 (2018) 2363-2380 Fulltext: PDF; External link: Fulltext
4.
Unexpectedly acidic nanoparticles formed in dimethylamine–ammonia–sulfuric-acid nucleation experiments at CLOUD / Lawler, Michael J (UC, Irvine (main)) ; Winkler, Paul M (Vienna U.) ; Kim, Jaeseok (UEF, Kuopio ; Korea Polar Research Institute, Republic of Korea) ; Ahlm, Lars (Stockholm U.) ; Tröstl, Jasmin (PSI, Villigen) ; Praplan, Arnaud P (Helsinki U. ; Finnish Meteorological Inst.) ; Schobesberger, Siegfried (Helsinki U. ; Washington U., Seattle) ; Kürten, Andreas (Goethe U., Frankfurt (main)) ; Kirkby, Jasper (Goethe U., Frankfurt (main) ; CERN) ; Bianchi, Federico (Helsinki U.) et al.
New particle formation driven by acid–base chemistry was initiated in the CLOUD chamber at CERN by introducing atmospherically relevant levels of gas-phase sulfuric acid and dimethylamine (DMA). Ammonia was also present in the chamber as a gas-phase contaminant from earlier experiments [...]
2016 - 18 p. - Published in : Atmosph. Chem. Phys. 16 (2016) 13601-13618 Fulltext: PDF;
5.
The effect of acid–base clustering and ions on the growth of atmospheric nano-particles / Lehtipalo, Katrianne (Helsinki U. ; PSI, Villigen) ; Rondo, Linda (Frankfurt U.) ; Kontkanen, Jenni (Helsinki U.) ; Schobesberger, Siegfried (Helsinki U. ; Washington U., Seattle) ; Jokinen, Tuija (Helsinki U.) ; Sarnela, Nina (Helsinki U.) ; Kürten, Andreas (Frankfurt U.) ; Ehrhart, Sebastian (Frankfurt U. ; CERN) ; Franchin, Alessandro (Helsinki U.) ; Nieminen, Tuomo (Helsinki U.) et al.
The growth of freshly formed aerosol particles can be the bottleneck in their survival to cloud condensation nuclei. It is therefore crucial to understand how particles grow in the atmosphere. [...]
2016 - Published in : Nature Commun. 7 (2016) 11594 Fulltext: PDF;
6.
Experimental particle formation rates spanning tropospheric sulfuric acid and ammonia abundances, ion production rates, and temperatures / Kürten, Andreas ; Bianchi, Federico ; Almeida, Joao (CERN) ; Kupiainen-Määttä, Oona ; Dunne, Eimear M. ; Duplissy, Jonathan (CERN) ; Williamson, Christina ; Barmet, Peter ; Breitenlechner, Martin ; Dommen, Josef et al.
Binary nucleation of sulfuric acid and water as well as ternary nucleation involving ammonia arethought to be the dominant processes responsible for new particle formation (NPF) in the cold temperaturesof the middle and upper troposphere. Ions are also thought to be important for particle nucleation inthese regions. [...]
2016 - 24 p. - Published in : J. Geophys. Res. Atmos. 121 (2016) 12,377-12,400

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