1.
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Reduced anthropogenic aerosol radiative forcing caused by biogenic new particle formation
/ Gordon, Hamish (CERN) ; Sengupta, Kamalika (U. Leeds (main)) ; Rap, Alexandru (U. Leeds (main)) ; Duplissy, Jonathan (Helsinki Inst. of Phys.) ; Frege, Carla (PSI, Villigen) ; Williamson, Christina (Goethe U., Frankfurt (main) ; Colorado U., CIRES ; NCAR, Boulder) ; Heinritzi, Martin (Goethe U., Frankfurt (main)) ; Simon, Mario (Goethe U., Frankfurt (main)) ; Yan, Chao (Helsinki U.) ; Almeida, João (CERN ; Goethe U., Frankfurt (main)) et al.
2016
- Published in : Proc. Natl. Acad. Sci. U. S. A. 113 (2016) 12053-12058
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2.
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Ion-induced nucleation of pure biogenic particles
/ Kirkby, Jasper (Goethe U., Frankfurt (main) ; CERN) ; Duplissy, Jonathan (Helsinki U. ; Helsinki Inst. of Phys.) ; Sengupta, Kamalika (U. Leeds (main)) ; Frege, Carla (PSI, Villigen) ; Gordon, Hamish (CERN) ; Williamson, Christina (Goethe U., Frankfurt (main)) ; Heinritzi, Martin (Goethe U., Frankfurt (main) ; Innsbruck U.) ; Simon, Mario (Goethe U., Frankfurt (main)) ; Yan, Chao (Helsinki U.) ; Almeida, João (Goethe U., Frankfurt (main) ; CERN) et al.
Atmospheric aerosols and their effect on clouds are thought to be important for anthropogenic radiative forcing of the climate, yet remain poorly understood. Globally, around half of cloud condensation nuclei originate from nucleation of atmospheric vapours. [...]
2016
- Published in : Nature 533 (2016) 521-526
NPG Open Access article: PDF;
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3.
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The role of low-volatility organic compounds in initial particle growth in the atmosphere
/ Tröstl, Jasmin (PSI, Villigen) ; Chuang, Wayne K (Carnegie Mellon U. (main)) ; Gordon, Hamish (CERN) ; Heinritzi, Martin (Goethe U., Frankfurt (main)) ; Yan, Chao (Helsinki U.) ; Molteni, Ugo (PSI, Villigen) ; Ahlm, Lars (Stockholm U. (main)) ; Frege, Carla (PSI, Villigen) ; Bianchi, Federico (PSI, Villigen ; Helsinki U. ; ETH, Zurich (main)) ; Wagner, Robert (Helsinki U.) et al.
About half of present-day cloud condensation nuclei originate from atmospheric nucleation, frequently appearing as a burst of new particles near midday. Atmospheric observations show that the growth rate of new particles often accelerates when the diameter of the particles is between one and ten nanometres. [...]
2016
- Published in : Nature 533 (2016) 527-531
NPG Open Access article: PDF;
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4.
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Evolution of particle composition in CLOUD nucleation experiments
/ Keskinen, H (UEF, Kuopio) ; Virtanen, A (UEF, Kuopio) ; Joutsensaari, J (UEF, Kuopio) ; Tsagkogeorgas, G (TROPOS, Leibniz) ; Duplissy, J (Helsinki U.) ; Schobesberger, S (Helsinki U.) ; Gysel, M (PSI, Villigen) ; Riccobono, F (PSI, Villigen) ; Bianchi, F (PSI, Villigen) ; Yli-Juuti, T (Helsinki U.) et al.
Sulphuric acid, ammonia, amines, and oxidised organics play a crucial role in nanoparticle formation in the atmosphere. In this study, we investigate the composition of nucleated nanoparticles formed from these compounds in the CLOUD (Cosmics Leaving Outdoor Droplets) chamber experiments at CERN (Centre europ ́ een pour la recherche nucl ́ eaire). [...]
2013
- Published in : Atmos. Chem. Phys. 13 (2013) 5587-5600
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5.
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Insight into Acid–Base Nucleation Experiments by Comparison of the Chemical Composition of Positive, Negative, and Neutral Clusters
/ Bianchi, Federico (PSI, Villigen) ; Praplan, Arnaud P (Helsinki U.) ; Sarnela, Nina (Helsinki U.) ; Dommen, Josef (PSI, Villigen) ; Kürten, Andreas (Goethe U., Frankfurt (main)) ; Ortega, Ismael K (Lille U.) ; Schobesberger, Siegfried (Helsinki U.) ; Junninen, Heikki (Helsinki U.) ; Simon, Mario (Goethe U., Frankfurt (main)) ; Tröstl, Jasmin (PSI, Villigen) et al.
We investigated the nucleation of sulfuric acid together with two bases (ammonia and dimethylamine), at the CLOUD chamber at CERN. The chemical composition of positive, negative, and neutral clusters was studied using three Atmospheric Pressure interface-Time Of Flight (APi-TOF) mass spectrometers: two were operated in positive and negative mode to detect the chamber ions, while the third was equipped with a nitrate ion chemical ionization source allowing detection of neutral clusters. [...]
2014 - 10 p.
- Published in : Environ. Sci. Technol. 48 (2014) 13675-13684
Fulltext: PDF;
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6.
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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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7.
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Neutral molecular cluster formation of sulfuric acid–dimethylamine observed in real time under atmospheric conditions
/ Kürten, Andreas (Goethe U., Frankfurt (main)) ; Jokinen, Tuija (Helsinki U.) ; Simon, Mario (Goethe U., Frankfurt (main)) ; Sipilä, Mikko (Helsinki U. ; Helsinki Inst. of Phys.) ; Sarnela, Nina (Helsinki U.) ; Junninen, Heikki (Helsinki U.) ; Adamov, Alexey (Helsinki U.) ; Almeida, João (Goethe U., Frankfurt (main) ; CERN) ; Amorim, Antonio (UBI, Covilha ; U. Lisbon (main)) ; Bianchi, Federico (PSI, Villigen) et al.
For atmospheric sulfuric acid (SA) concentrations the presence of dimethylamine (DMA) at mixing ratios of several parts per trillion by volume can explain observed boundary layer new particle formation rates. However, the concentration and molecular composition of the neutral (uncharged) clusters have not been reported so far due to the lack of suitable instrumentation. [...]
arXiv:1509.03474.-
2014
- Published in : Proc. Natl. Acad. Sci. U.S.A. 111 (2014) 15019-15024
External link: Fulltext
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8.
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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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9.
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Molecular understanding of atmospheric particle formation from sulfuric acid and large oxidized organic molecules
/ Schobesberger, Siegfried (Helsinki U.) ; Junninen, Heikki (Helsinki U.) ; Bianchi, Federico (PSI, Villigen) ; Lönn, Gustaf (Helsinki U.) ; Ehn, Mikael (Helsinki U.) ; Lehtipalo, Katrianne (Helsinki U.) ; Dommen, Josef (PSI, Villigen) ; Ehrhart, Sebastian (Goethe U., Frankfurt (main)) ; Ortega, Ismael K (Helsinki U.) ; Franchin, Alessandro (Helsinki U.) et al.
Atmospheric aerosols formed by nucleation of vapors affect radiative forcing and therefore climate. However, the underlying mechanisms of nucleation remain unclear, particularly the involvement of organic compounds. [...]
2013
- Published in : Proc. Natl. Acad. Sci. U.S.A. 110 (2013) 17223-17228
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10.
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Oxidation Products of Biogenic Emissions Contribute to Nucleation of Atmospheric Particles
/ Riccobono, Francesco (PSI, Villigen) ; Schobesberger, S (Helsinki U.) ; Baltensperger, Urs (PSI, Villigen) ; Worsnop, Douglas R (Helsinki U. ; Aerodyne Research, Billerica) ; Curtius, Joachim (Goethe U., Frankfurt (main)) ; Carslaw, Kenneth S (U. Leeds (main)) ; Wimmer, Daniela (Goethe U., Frankfurt (main)) ; Wex, Heike (TROPOS, Leibniz) ; Weingartner, Ernest (PSI, Villigen) ; Wagner, Paul E (Finnish Meteorological Inst.) et al.
Atmospheric new-particle formation affects climate and is one of the least understood atmospheric aerosol processes. The complexity and variability of the atmosphere has hindered elucidation of the fundamental mechanism of new-particle formation from gaseous precursors. [...]
2014
- Published in : Science 344 (2014) 717-721
Data S1: TXT; Data S2: TXT; Data S3: TXT; Data S4: TXT; Supplementary materials: PDF; External link: Free access (choose "reprint")
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