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CERN Document Server 8 записей найдено  Поиск длился 0.56 секунд. 
1.
Determination of the collision rate coefficient between charged iodic acid clusters and iodic acid using the appearance time method / He, Xu-Cheng (U. Helsinki (main)) ; Iyer, Siddharth (U. Helsinki (main)) ; Sipilä, Mikko (U. Helsinki (main)) ; Ylisirniö, Arttu (UEF, Kuopio) ; Peltola, Maija (Helsinki U.) ; Kontkanen, Jenni (Helsinki U.) ; Baalbaki, Rima (Helsinki U.) ; Simon, Mario (Goethe U., Frankfurt (main)) ; Kürten, Andreas (Goethe U., Frankfurt (main)) ; Tham, Yee Jun (Helsinki U.) et al.
Ions enhance the formation rate of atmospheric aerosol particles, which play an important role in Earth’s radiative balance. Ion-induced nucleation involves the stepwise accretion of neutral monomers onto a molecular cluster containing an ion, which helps to stabilize the cluster against evaporation. [...]
2020 - 12 p. - Published in : Aerosol Sci. Technol. 55 (2020) 231-242 Fulltext: PDF;
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2.
Zeppelin-led study on the onset of new particle formation in the planetary boundary layer / Lampilahti, Janne (Helsinki U.) ; Manninen, Hanna E (CERN) ; Nieminen, Tuomo (Helsinki U.) ; Mirme, Sander (Tartu U.) ; Ehn, Mikael (Helsinki U.) ; Pullinen, Iida (Kuopio U.) ; Leino, Katri (Helsinki U.) ; Schobesberger, Siegfried (Helsinki U. ; Kuopio U.) ; Kangasluoma, Juha (Helsinki U.) ; Kontkanen, Jenni (Helsinki U.) et al.
We compared observations of aerosol particle formation and growth in different parts of the planetary boundary layer at two different environments that have frequent new particle formation (NPF) events. In summer 2012 we had a campaign in Po Valley, Italy (urban background), and in spring 2013 a similar campaign took place in Hyytiälä, Finland (rural background). [...]
2021 - 15 p. - Published in : Atmos. Chem. Phys. 21 (2021) 12649-12663 Fulltext: PDF;
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3.
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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4.
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
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5.
Multicomponent new particle formation from sulfuric acid, ammonia, and biogenic vapors / Lehtipalo, Katrianne (U. Helsinki (main) ; PSI, Villigen ; Finnish Meteorological Inst.) ; Yan, Chao (U. Helsinki (main)) ; Dada, Lubna (U. Helsinki (main)) ; Bianchi, Federico (U. Helsinki (main)) ; Xiao, Mao (PSI, Villigen) ; Wagner, Robert (U. Helsinki (main)) ; Stolzenburg, Dominik (Vienna U.) ; Ahonen, Lauri R (U. Helsinki (main)) ; Amorim, Antonio (Lisbon, CENTRA ; Lisbon U.) ; Baccarini, Andrea (PSI, Villigen) et al.
A major fraction of atmospheric aerosol particles, which affect both air quality and climate, form from gaseous precursors in the atmosphere. Highly oxygenated organic molecules (HOMs), formed by oxidation of biogenic volatile organic compounds, are known to participate in particle formation and growth. [...]
2018 - 10 p. - Published in : Sci. Adv. 4 (2018) eaau5363 Fulltext: PDF;
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6.
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
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7.
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;
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8.
Methods for determining particle size distribution and growth rates between 1 and 3 nm using the Particle Size Magnifier / Lehtipalo, Katrianne (Helsinki U. ; Airmodus, Helsinki) ; Leppä, Johannes (Finnish Meteorological Inst.) ; Kontkanen, Jenni (Helsinki U.) ; Kangasluoma, Juha (Helsinki U.) ; Franchin, Alessandro (Helsinki U.) ; Wimmer, Daniela (Helsinki U.) ; Schobesberger, Siegfried (Helsinki U.) ; Junninen, Heikki (Helsinki U.) ; Petäjä, Tuukka (Helsinki U.) ; Sipilä, Mikko (Helsinki U.) et al.
The most important parameters describing the atmospheric new particle formation process are the particle formation and growth rates. These together determine the amount of cloud condensation nuclei attributed to secondary particle formation. [...]
2014 - Published in : Boreal Env. Res.: 19 (suppl. B) (2014) , pp. 215-236
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