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    Academic Journals

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• Measurement report: New particle formation characteristics at an urban and a mountain station in northern China.

  Authors:Ying Zhou, Simo Hakala, Chao Yan, Yang Gao, Xiaohong Yao, Biwu Chu, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 23) Peer-Reviewed

  Dec. 7, 2021392 words Brief article Atmospheric new particle formation (NPF) events have attracted increasing attention for their contribution to the global aerosol number budget and therefore their effects on climate, air quality and human health. NPF...

• Zeppelin-led study on the onset of new particle formation in the planetary boundary layer.

  Authors:Janne Lampilahti, Hanna E. Manninen, Tuomo Nieminen, Sander Mirme, Mikael Ehn, Iida Pullinen, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 16) Peer-Reviewed

  Aug. 26, 2021259 words Brief article 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...

• Atmospheric gaseous hydrochloric and hydrobromic acid in urban Beijing, China: detection, source identification and potential atmospheric impacts.

  Authors:Xiaolong Fan, Jing Cai, Chao Yan, Jian Zhao, Yishuo Guo, Chang Li, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 14) Peer-Reviewed

  July 29, 2021427 words Article Gaseous hydrochloric (HCl) and hydrobromic acid (HBr) are vital halogen species that play essential roles in tropospheric physicochemical processes. Yet, the majority of the current studies on these halogen species were...

• Sources and sinks driving sulfuric acid concentrations in contrasting environments: implications on proxy calculations.

  Authors:Lubna Dada, Ilona Ylivinkka, Rima Baalbaki, Chang Li, Yishuo Guo, Chao Yan, et al.From:Atmospheric Chemistry and Physics (Vol. 20, Issue 20) Peer-Reviewed

  Oct. 19, 2020337 words Brief article Sulfuric acid has been shown to be a key driver for new particle formation and subsequent growth in various environments, mainly due to its low volatility. However, direct measurements of gas-phase sulfuric acid are...

• Size-resolved particle number emissions in Beijing determined from measured particle size distributions.

  Authors:Jenni Kontkanen, Chenjuan Deng, Yueyun Fu, Lubna Dada, Ying Zhou, Jing Cai, et al.From:Atmospheric Chemistry and Physics (Vol. 20, Issue 19) Peer-Reviewed

  Oct. 5, 2020327 words Brief article The climate and air quality effects of aerosol particles depend on the number and size of the particles. In urban environments, a large fraction of aerosol particles originates from anthropogenic emissions. To evaluate...

• The role of ions in new particle formation in the CLOUD chamber

  Authors:Robert Wagner, Chao Yan, Katrianne Lehtipalo, Jonathan Duplissy, Tuomo Nieminen, Juha Kangasluoma, et al.From:Atmospheric Chemistry and Physics (Vol. 17, Issue 24) Peer-Reviewed

  Dec. 21, 2017324 words Brief article 970LThe 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...

• Growth of atmospheric clusters involving cluster-cluster collisions: comparison of different growth rate methods

  Authors:Jenni Kontkanen, Tinja Olenius, Katrianne Lehtipalo, Markku Kulmala, and Kari E. J. LehtinenFrom:Atmospheric Chemistry and Physics (Vol. 16, Issue 9) Peer-Reviewed

  May 4, 2016290 words Brief article We simulated the time evolution of atmospheric cluster concentrations in a one-component system where not only do clusters grow by condensation of monomers, but cluster-cluster collisions also significantly contribute...

• Atmospheric new particle formation from sulfuric acid and amines in a Chinese megacity.

  Authors:Lei Yao, Olga Garmash, Federico Bianchi, Jun Zheng, Chao Yan, Jenni Kontkanen, et al.From:Science (Vol. 361, Issue 6399) Peer-Reviewed

  July 20, 20183,903 words Article 1620L

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• Direct observations of atmospheric aerosol nucleation

  Authors:Markku Kulmala, Jenni Kontkanen, Heikki Junninen, Katrianne Lehtipalo, Hanna E. Manninen, Tuomo Nieminen, et al.From:Science (Vol. 339, Issue 6122) Peer-Reviewed

  Feb. 22, 2013117 words Author abstract, Rep...

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• Rapid growth of organic aerosol nanoparticles over a wide tropospheric temperature range

  Authors:Dominik Stolzenburg, Lukas Fischer, Alexander L. Vogel, Martin Heinritzi, Meredith Schervish, Mario Simon, et al.From:Proceedings of the National Academy of Sciences of the United States (Vol. 115, Issue 37) Peer-Reviewed

  Sept. 11, 20186,050 words Author abstract, Rep... 1510L

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• Long-term measurement of sub-3 nm particles and their precursor gases in the boreal forest.

  Authors:Juha Sulo, Nina Sarnela, Jenni Kontkanen, Lauri Ahonen, Pauli Paasonen, Tiia Laurila, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 2) Peer-Reviewed

  Jan. 19, 2021355 words Brief article The knowledge of the dynamics of sub-3 nm particles in the atmosphere is crucial for our understanding of the first steps of atmospheric new particle formation. Therefore, accurate and stable long-term measurements of...

• Simple proxies for estimating the concentrations of monoterpenes and their oxidation products at a boreal forest site

  Authors:Jenni Kontkanen, Pauli Paasonen, Juho Aalto, Pekka Rantala, and Markku KulmalaFrom:Atmospheric Chemistry and Physics (Vol. 16, Issue 20) Peer-Reviewed

  Oct. 28, 2016315 words Brief article The oxidation products of monoterpenes likely have a crucial role in the formation and growth of aerosol particles in boreal forests. However, the continuous measurements of monoterpene concentrations are usually not...

• Comprehensive analysis of particle growth rates from nucleation mode to cloud condensation nuclei in boreal forest

  Authors:Pauli Paasonen, Maija Peltola, Jenni Kontkanen, Heikki Junninen, Veli-Matti Kerminen, and Markku KulmalaFrom:Atmospheric Chemistry and Physics (Vol. 18, Issue 16) Peer-Reviewed

  Aug. 22, 2018401 words Author abstract, Bri...

  Growth of aerosol particles to sizes at which they can act as cloud condensation nuclei (CCN) is a crucial factor in estimating the current and future impacts of aerosol-cloud-climate interactions. Growth rates (GRs)...

• Sulfuric acid-amine nucleation in urban Beijing.

  Authors:Runlong Cai, Chao Yan, Dongsen Yang, Rujing Yin, Yiqun Lu, Chenjuan Deng, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 4) Peer-Reviewed

  Feb. 18, 2021251 words Brief article New particle formationÃá(NPF) is one of the major sources of atmospheric ultrafine particles. Due to the high aerosol and trace gas concentrations, the mechanism and governing factors for NPF in the polluted atmospheric...

• Amines in boreal forest air at SMEAR II station in Finland

  Authors:Marja Hemmila, Heidi Hellen, Aki Virkkula, Ulla Makkonen, Arnaud P. Praplan, Jenni Kontkanen, et al.From:Atmospheric Chemistry and Physics (Vol. 18, Issue 9) Peer-Reviewed

  May 4, 2018390 words Author abstract, Bri...

  We measured amines in boreal forest air in Finland both in gas and particle phases with 1 h time resolution using an online ion chromatograph (instrument for Measuring AeRosols and Gases in Ambient Air -...

• New particle formation, growth and apparent shrinkage at a rural background site in western Saudi Arabia

  Authors:Simo Hakala, Mansour A. Alghamdi, Pauli Paasonen, Ville Vakkari, Mamdouh I. Khoder, Kimmo Neitola, et al.From:Atmospheric Chemistry and Physics (Vol. 19, Issue 16) Peer-Reviewed

  Aug. 21, 2019355 words Author abstract, Bri...

  Atmospheric aerosols have significant effects on human health and the climate. A large fraction of these aerosols originates from secondary new particle formation (NPF), where atmospheric vapors form small particles...

• Formation of nighttime sulfuric acid from the ozonolysis of alkenes in Beijing.

  Authors:Yishuo Guo, Chao Yan, Chang Li, Wei Ma, Zemin Feng, Ying Zhou, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 7) Peer-Reviewed

  Apr. 8, 2021397 words Brief article Gaseous sulfuric acid (SA) has received a lot of attention for its crucial role in atmospheric new particle formation (NPF). And for this reason, studies until now have mainly focused on daytime SA when most NPF events...

• Molecular-scale evidence of aerosol particle formation via sequential addition of HIO3

  Authors:Mikko Sipil, Nina Sarnela, Tuija Jokinen, Henning Henschel, Heikki Junninen, Jenni Kontkanen, et al.From:Nature (Vol. 537, Issue 7621) Peer-Reviewed

  Sept. 22, 20163,546 words Report 1680LAuthor(s): Mikko Sipil (corresponding author) [1]; Nina Sarnela [1]; Tuija Jokinen [1]; Henning Henschel [1]; Heikki Junninen [1]; Jenni Kontkanen [1]; Stefanie Richters [2]; Juha Kangasluoma [1]; Alessandro Franchin...

• Molecular-scale evidence of aerosol particle formation via sequential addition of HIO.sub.3.

  Authors:Mikko Sipilä, Nina Sarnela, Tuija Jokinen, Henning Henschel, Heikki Junninen, Jenni Kontkanen, et al.From:Nature (Vol. 537, Issue 7621) Peer-Reviewed

  Sept. 22, 20163,712 words Report 1610LField data from an iodine-rich, coastal environment point to the molecular steps involved in the formation of new aerosol particles from iodine vapours over coastal regions. Aerosol particle formation in coastal...

• Measurement report: The influence of traffic and new particle formation on the size distribution of 1-800 nm particles in Helsinki - a street canyon and an urban background station comparison.

  Authors:Magdalena Okuljar, Heino Kuuluvainen, Jenni Kontkanen, Olga Garmash, Miska Olin, Jarkko V. Niemi, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 13) Peer-Reviewed

  July 2, 2021382 words Brief article Most of the anthropogenic air pollution sources are located in urban environments. The contribution of these sources to the population of atmospheric particles in the urban environment is poorly known. In this study, we...