Search Results

• • 20 

    Academic Journals

  • Sort by: sorttype.publication.date.desc Newest sorttype.publication.date.asc Oldest sorttype.relevance Relevance

• Oxidation product characterization from ozonolysis of the diterpene ent-kaurene.

  Authors:Yuanyuan Luo, Olga Garmash, Haiyan Li, Frans Graeffe, Arnaud P. Praplan, Anssi Liikanen, et al.From:Atmospheric Chemistry and Physics (Vol. 22, Issue 8) Peer-Reviewed

  Apr. 27, 2022332 words Brief article Diterpenes (C.sub.20 H.sub.32) are biogenically emitted volatile compounds that only recently have been observed in ambient air. They are expected to be highly reactive, and their oxidation is likely to form condensable...

• The driving factors of new particle formation and growth in the polluted boundary layer.

  Authors:Mao Xiao, Christopher R. Hoyle, Lubna Dada, Dominik Stolzenburg, Andreas Kürten, Mingyi Wang, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 18) Peer-Reviewed

  Sept. 27, 2021237 words Brief article New particle formation (NPF) is a significant source of atmospheric particles, affecting climate and air quality. Understanding the mechanisms involved in urban aerosols is important to develop effective mitigation...

• Combined effects of boundary layer dynamics and atmospheric chemistry on aerosol composition during new particle formation periods

  Authors:Liqing Hao, Olga Garmash, Mikael Ehn, Pasi Miettinen, Paola Massoli, Santtu Mikkonen, et al.From:Atmospheric Chemistry and Physics (Vol. 18, Issue 23) Peer-Reviewed

  Dec. 13, 2018411 words Author abstract, Bri...

  Characterizing aerosol chemical composition in response to meteorological changes and atmospheric chemistry is important to gain insights into new particle formation mechanisms. A BAECC (Biogenic Aerosols - Effects...

• Influence of temperature on the molecular composition of ions and charged clusters during pure biogenic nucleation

  Authors:Carla Frege, Ismael K. Ortega, Matti P. Rissanen, Arnaud P. Praplan, Gerhard Steiner, Martin Heinritzi, et al.From:Atmospheric Chemistry and Physics (Vol. 18, Issue 1) Peer-Reviewed

  Jan. 4, 2018273 words Author abstract, Bri...

  It was recently shown by the CERN CLOUD experiment that biogenic highly oxygenated molecules (HOMs) form particles under atmospheric conditions in the absence of sulfuric acid, where ions enhance the nucleation rate...

• 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...

• A novel approach for simple statistical analysis of high-resolution mass spectra

  Authors:Yanjun Zhang, Chao Yan, Liine Heikkinen, Kaspar R. Daellenbach, Qiaozhi Zha, Matthieu Riva, et al.From:Atmospheric Measurement Techniques (Vol. 12, Issue 7) Peer-Reviewed

  July 11, 2019284 words Brief article

  Recent advancements in atmospheric mass spectrometry provide huge amounts of new information but at the same time present considerable challenges for the data analysts. High-resolution (HR) peak identification and...

• Eight years of sub-micrometre organic aerosol composition data from the boreal forest characterized using a machine-learning approach.

  Authors:Liine Heikkinen, Mikko Ãijälä, Kaspar R. Daellenbach, Gang Chen, Olga Garmash, Diego Aliaga, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 13) Peer-Reviewed

  July 6, 2021823 words Article The Station for Measuring Ecosystem-Atmosphere Relations (SMEAR) II, located within the boreal forest of Finland, is a unique station in the world due to the wide range of long-term measurements tracking the...

• 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

   Abstract Only

• A proxy for atmospheric daytime gaseous sulfuric acid concentration in urban Beijing

  Authors:Yiqun Lu, Chao Yan, Yueyun Fu, Yan Chen, Yiliang Liu, Gan Yang, et al.From:Atmospheric Chemistry and Physics (Vol. 19, Issue 3) Peer-Reviewed

  Feb. 13, 2019401 words Author abstract, Bri...

  Gaseous sulfuric acid (H.sub.2 SO.sub.4) is known as one of the key precursors for atmospheric new particle formation (NPF) processes, but its measurement remains challenging. Therefore, a proxy method that is able...

• 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

   Abstract Only

• The role of H.sub.2SO.sub.4-NH.sub.3 anion clusters in ion-induced aerosol nucleation mechanisms in the boreal forest

  Authors:Chao Yan, Lubna Dada, Clemence Rose, Tuija Jokinen, Wei Nie, Siegfried Schobesberger, et al.From:Atmospheric Chemistry and Physics (Vol. 18, Issue 17) Peer-Reviewed

  Sept. 13, 2018349 words Author abstract, Bri...

  New particle formation (NPF) provides a large source of atmospheric aerosols, which affect the climate and human health. In recent chamber studies, ion-induced nucleation (IIN) has been discovered as an important...

• Effects of chemical complexity on the autoxidation mechanisms of endocyclic alkene ozonolysis products: from methylcyclohexenes toward understanding alpha-pinene

  Authors:Matti P. Rissanen, Theo Kurten, Mikko Sipila, Joel A. Thornton, Oskari Kausiala, Olga Garmash, et al.From:Journal of Physical Chemistry A (Vol. 119, Issue 19) Peer-Reviewed

  May 14, 2015 Report

   Citation Only

• Influence of temperature on the molecular composition of ions and charged clusters during pure biogenic nucleation

  Authors:Carla Frege, Ismael K. Ortega, Matti P. Rissanen, Arnaud P. Praplan, Gerhard Steiner, Martin Heinritzi, et al.From:Atmospheric Chemistry and Physics (Vol. 18, Issue 1) Peer-Reviewed

  Jan. 4, 201834 words Author abstract, Bri... Byline: To access, purchase, authenticate, or subscribe to the full-text of this article, please visit this link:...

• Evaluating the performance of five different chemical ionization techniques for detecting gaseous oxygenated organic species

  Authors:Matthieu Riva, Pekka Rantala, Jordan E. Krechmer, Otso Perakyla, Yanjun Zhang, Liine Heikkinen, et al.From:Atmospheric Measurement Techniques (Vol. 12, Issue 4) Peer-Reviewed

  Apr. 17, 201957 words Author abstract, Bri... Byline: Matthieu Riva, Pekka Rantala, Jordan E. Krechmer, Otso Perä,kylä,, Yanjun Zhang, Liine Heikkinen, Olga Garmash, Chao Yan, Markku Kulmala, Douglas Worsnop, Mikael Ehn To access, purchase, authenticate,...

• Multi-generation OH oxidation as a source for highly oxygenated organic molecules from aromatics

  Authors:Olga Garmash, Matti P. Rissanen, Iida Pullinen, Sebastian Schmitt, Oskari Kausiala, Ralf Tillmann, et al.From:Atmospheric Chemistry and Physics (Vol. 20, Issue 1) Peer-Reviewed

  Jan. 15, 2020494 words Brief article Recent studies have recognised highly oxygenated organic molecules (HOMs) in the atmosphere as important in the formation of secondary organic aerosol (SOA). A large number of studies have focused on HOM formation from...

• Measurement report: Effects of NO.sub.x and seed aerosol on highly oxygenated organic molecules (HOMs) from cyclohexene ozonolysis.

  Authors:Meri Räty, Otso Peräkylä, Matthieu Riva, Lauriane Quéléver, Olga Garmash, Matti Rissanen, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 9) Peer-Reviewed

  May 17, 2021429 words Article Cyclohexene (C.sub.6 H.sub.10) is commonly used as a proxy for biogenic monoterpenes, when studying their oxidation mechanisms and secondary organic aerosol (SOA) formation. The ozonolysis of cyclohexene has been shown...

• Chemical characterisation of benzene oxidation products under high- and low-NO.sub.x conditions using chemical ionisation mass spectrometry.

  Authors:Michael Priestley, Thomas J. Bannan, Michael Le Breton, Stephen D. Worrall, Sungah Kang, Iida Pullinen, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 5) Peer-Reviewed

  Mar. 5, 2021535 words Article Aromatic hydrocarbons are a class of volatile organic compounds associated with anthropogenic activity and make up a significant fraction of urban volatile organic compound (VOC) emissions that contribute to the...

• Insights into atmospheric oxidation processes by performing factor analyses on subranges of mass spectra.

  Authors:Yanjun Zhang, Otso Peräkylä, Chao Yan, Liine Heikkinen, Mikko Ãijälä, Kaspar R. Daellenbach, et al.From:Atmospheric Chemistry and Physics (Vol. 20, Issue 10) Peer-Reviewed

  May 19, 2020322 words Brief article Our understanding of atmospheric oxidation chemistry has improved significantly in recent years, greatly facilitated by developments in mass spectrometry. The generated mass spectra typically contain vast amounts of...

• 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...

• Molecular understanding of the suppression of new-particle formation by isoprene.

  Authors:Martin Heinritzi, Lubna Dada, Mario Simon, Dominik Stolzenburg, Andrea C. Wagner, Lukas Fischer, et al.From:Atmospheric Chemistry and Physics (Vol. 20, Issue 20) Peer-Reviewed

  Oct. 20, 2020344 words Brief article Nucleation of atmospheric vapours produces more than half of global cloud condensation nuclei and so has an important influence on climate. Recent studies show that monoterpene (C.sub.10 H.sub.16) oxidation yields highly...