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CLOUD Papers

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2022-11-30
10:59
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;

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2022-11-30
10:59
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;

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2020-11-27
06:03
A CLOUD Chamber with a Silvery Lining / Kirkby, Jasper (CERN ; Goethe U., Frankfurt (main))
2017 - 6 p. - Published in : Adv. Ser. Direct. High Energy Phys.: 27 (2017) , pp. 387-392 Fulltext: PDF;
In : Knowledge and Technology: Sharing With Society, pp.387-392

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2020-08-04
06:57
Measurement of ammonia, amines and iodine compounds using protonated water cluster chemical ionization mass spectrometry / Pfeifer, Joschka (CERN ; Goethe U., Frankfurt (main)) ; Simon, Mario (Goethe U., Frankfurt (main)) ; Heinritzi, Martin (Goethe U., Frankfurt (main)) ; Piel, Felix (Goethe U., Frankfurt (main)) ; Weitz, Lena (Goethe U., Frankfurt (main)) ; Wang, Dongyu (PSI, Villigen) ; Granzin, Manuel (Goethe U., Frankfurt (main)) ; Müller, Tatjana (Goethe U., Frankfurt (main)) ; Bräkling, Steffen (Unlisted, CH) ; Kirkby, Jasper (CERN ; Goethe U., Frankfurt (main)) et al.
Here we describe the design and performance of a new water cluster chemical ionization–atmospheric pressure interface time-of-flight mass spectrometer (CI-APi-TOF). The instrument selectively measures trace gases with high proton affinity such as ammonia and dimethylamine, which are important for atmospheric new particle formation and growth. [...]
2020 - 22 p. - Published in : Atmos. Meas. Tech. 13 (2020) 2501-2522 Fulltext from Publisher: PDF;

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2019-04-12
06:24
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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2018-04-06
06:04
An ultra-pure gas system for the CLOUD experiment at CERN / Guida, Roberto (CERN) ; Carrie, P (CERN) ; De Menezes, L (CERN) ; Duplissy, J (CERN) ; Fayet, F (CERN) ; Kirkby, J (CERN) ; Mathot, S (CERN) ; Minginette, P (CERN) ; Onnela, A (CERN) ; Rochez, J (CERN) et al.
The Cosmics Leaving Outdoor Droplets (CLOUD) experiment aims to recreate atmospheric conditions inside a large chamber where the mechanisms for the formation of aerosol and cloud are studied. Aerosol and cloud are recognized as representing the largest uncertainty in the current understanding of climate change together with the influence of the cosmic rays. [...]
2013 - 5 p. - Published in : 10.1109/NSSMIC.2012.6551298
In : 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference, Anaheim, California, USA, 29 Oct - 3 Nov 2012, pp.1199-1203

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2018-04-06
06:04
Development of the gas system for the CLOUD experiment at CERN / Guida, R (CERN) ; Carrié, P (CERN) ; De Menezes, L (CERN) ; Duplissy, J (CERN) ; Fayet, F (CERN) ; Haider, S (CERN) ; Kirkby, J (CERN) ; Mathot, S (CERN) ; Minginette, P (CERN) ; Onnela, A (CERN) et al.
The Cosmics Leaving Outdoor Droplets (CLOUD) experiment aims to recreate atmospheric conditions inside a large chamber where the mechanisms for the formation of aerosol and cloud are studied. Aerosol and cloud are recognized as representing the largest uncertainty in the current understanding of climate change together with the influence of the cosmic rays. [...]
2014 - 5 p. - Published in : 10.1109/NSSMIC.2013.6829603
In : 2013 IEEE Nuclear Science Symposium and Medical Imaging Conference, Seoul, Korea, 26 Oct - 2 Nov 2013, pp.6829603

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2018-03-28
06:30
Performance of a corona ion source for measurement of sulfuric acid by chemical ionization mass spectrometry / Kürten, A (Goethe U., Frankfurt (main)) ; Rondo, L (Goethe U., Frankfurt (main)) ; Ehrhart, S (Goethe U., Frankfurt (main)) ; Curtius, J (Goethe U., Frankfurt (main))
The performance of an ion source based on corona discharge has been studied. This source is used for the detection of gaseous sulfuric acid by chemical ionization mass spectrometry (CIMS) through the reaction of NO3– ions with H2SO4. [...]
2011 - 7 p. - Published in : Atmos. Meas. Tech. 4 (2011) 437-443 Fulltext: PDF; External link: Fulltext

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2018-03-28
06:30
No statistically significant effect of a short-term decrease in the nucleation rate on atmospheric aerosols / Dunne, E M (U. Leeds (main) ; Finnish Meteorological Inst.) ; Lee, L A (U. Leeds (main)) ; Reddington, C L (U. Leeds (main)) ; Carslaw, K S (U. Leeds (main))
Observed correlations between short-term decreases in cosmic ray ionisation and cloud and aerosol properties have been attributed to short-term decreases in the ion-induced nucleation rate. We use a global aerosol microphysics model to determine whether a 10 day reduction of 15% in the nucleation rate could generate a statistically significant response in aerosol concentrations and optical properties. [...]
2012 - 15 p. - Published in : Atmos. Chem. Phys. 12 (2012) 11573-11587 Fulltext: PDF; External link: Fulltext

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2018-03-28
06:30
Calibration of a Chemical Ionization Mass Spectrometer for the Measurement of Gaseous Sulfuric Acid / Kürten, Andreas (Goethe U., Frankfurt (main)) ; Rondo, Linda (Goethe U., Frankfurt (main)) ; Ehrhart, Sebastian (Goethe U., Frankfurt (main)) ; Curtius, Joachim (Goethe U., Frankfurt (main))
The accurate measurement of the gaseous sulfuric acid concentration is crucial within many fields of atmospheric science. Instruments utilizing chemical ionization mass spectrometry (CIMS) measuring H2SO4, therefore, require a careful calibration. [...]
2012 - 12 p. - Published in : J. Phys. Chem. A 116 (2012) 6375-6386

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