C
Chao Yan
Researcher at University of Helsinki
Publications - 150
Citations - 5612
Chao Yan is an academic researcher from University of Helsinki. The author has contributed to research in topics: Aerosol & Chemistry. The author has an hindex of 31, co-authored 107 publications receiving 3322 citations. Previous affiliations of Chao Yan include Carnegie Mellon University & Helsinki Institute of Physics.
Papers
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Journal ArticleDOI
Large daytime signals of N 2 O 5 and NO 3 inferred at 62 amu in a TD-CIMS: chemical interference or a real atmospheric phenomenon?
Xinfeng Wang,Xinfeng Wang,Tao Wang,Tao Wang,Chao Yan,Yee Jun Tham,Likun Xue,Likun Xue,Zheng Xu,Zheng Xu,Qiaozhi Zha +10 more
TL;DR: In this article, a thermal dissociation chemical ionization mass spectrometer (TD-CIMS) was deployed to an urban site in Hong Kong to measure the sum of N2O5 and NO3 in autumn 2010 based on the signals of NO3− at 62 amu.
Journal ArticleDOI
A proxy for atmospheric daytime gaseous sulfuric acid concentration in urban Beijing
Yiqun Lu,Chao Yan,Yueyun Fu,Yan Chen,Yiliang Liu,Gan Yang,Yuwei Wang,F. Bianchi,Biwu Chu,Ying Zhou,Rujing Yin,Rima Baalbaki,Olga Garmash,Chenjuan Deng,Weigang Wang,Yongchun Liu,Tuukka Petäjä,Tuukka Petäjä,Veli-Matti Kerminen,Jingkun Jiang,Markku Kulmala,Markku Kulmala,Lin Wang +22 more
TL;DR: In this paper, the gaseous sulfuric acid (H2SO4 ) is known as one of the key precursors for atmospheric new particle formation (NPF) processes, but its measurement remains challenging.
Journal ArticleDOI
The role of ions in new particle formation in the CLOUD chamber
Robert Wagner,Chao Yan,Katrianne Lehtipalo,Katrianne Lehtipalo,Jonathan Duplissy,Tuomo Nieminen,Juha Kangasluoma,Lauri Ahonen,Lubna Dada,Jenni Kontkanen,Jenni Kontkanen,Hanna Elina Manninen,Hanna Elina Manninen,Antonio Dias,Antonio Dias,António Amorim,António Amorim,Paulus Salomon Bauer,Anton Bergen,Anne-Kathrin Bernhammer,F. Bianchi,Sophia Brilke,Sophia Brilke,Stephany Buenrostro Mazon,Xuemeng Chen,Danielle C. Draper,Lukas Fischer,Carla Frege,Claudia Fuchs,Olga Garmash,Hamish Gordon,Hamish Gordon,Jani Hakala,Liine Heikkinen,Martin Heinritzi,Victoria Hofbauer,Christopher R. Hoyle,Jasper Kirkby,Jasper Kirkby,Andreas Kürten,A. N. Kvashnin,Tiia Laurila,Michael J. Lawler,Huajun Mai,Vladimir Makhmutov,Vladimir Makhmutov,Roy L. Mauldin,Ugo Molteni,Leonid Nichman,Leonid Nichman,Wei Nie,Wei Nie,Andrea Ojdanic,Antti Onnela,Felix Piel,Lauriane L. J. Quéléver,Matti P. Rissanen,Nina Sarnela,Simon Schallhart,Kamalika Sengupta,Mario Simon,Dominik Stolzenburg,Yuri Stozhkov,Jasmin Tröstl,Yrjö Viisanen,Alexander L. Vogel,Alexander L. Vogel,Andrea Christine Wagner,Mao Xiao,Penglin Ye,Urs Baltensperger,Joachim Curtius,Neil M. Donahue,Richard C. Flagan,Martin Gallagher,Armin Hansel,James N. Smith,James N. Smith,António Tomé,Paul M. Winkler,Douglas R. Worsnop,Mikael Ehn,Mikko Sipilä,Veli-Matti Kerminen,Tuukka Petäjä,Markku Kulmala +85 more
TL;DR: In this paper, the influence of ions on the nucleation rates under precisely controlled and atmospherically relevant conditions is quantified using a novel instrument setup consisting of two nanoparticle counters, one of them equipped with an ion filter.
Journal ArticleDOI
Molecular understanding of the suppression of new-particle formation by isoprene
Martin Heinritzi,Lubna Dada,Mario Simon,Dominik Stolzenburg,Andrea C. Wagner,Andrea C. Wagner,Lukas Fischer,Lauri Ahonen,Stavros Amanatidis,Rima Baalbaki,Andrea Baccarini,Paulus Salomon Bauer,Bernhard Baumgartner,F. Bianchi,F. Bianchi,Sophia Brilke,Dexian Chen,Randall Chiu,Antonio Dias,Antonio Dias,Josef Dommen,Jonathan Duplissy,Henning Finkenzeller,Carla Frege,Claudia Fuchs,Olga Garmash,Hamish Gordon,Hamish Gordon,Manuel Granzin,Imad El Haddad,Xu-Cheng He,Johanna Helm,Victoria Hofbauer,Christopher R. Hoyle,Juha Kangasluoma,Juha Kangasluoma,Timo Keber,Changhyuk Kim,Changhyuk Kim,Andreas Kürten,Houssni Lamkaddam,Tiia Laurila,Janne Lampilahti,Chuan Ping Lee,Katrianne Lehtipalo,Markus Leiminger,Huajun Mai,Vladimir Makhmutov,Hanna E. Manninen,Ruby Marten,Serge Mathot,Roy L. Mauldin,Roy L. Mauldin,Bernhard Mentler,Ugo Molteni,T. Müller,Wei Nie,Tuomo Nieminen,Antti Onnela,Eva Partoll,Monica Passananti,Tuukka Petäjä,Joschka Pfeifer,Joschka Pfeifer,Veronika Pospisilova,Lauriane L. J. Quéléver,Matti P. Rissanen,Clémence Rose,Clémence Rose,Siegfried Schobesberger,Wiebke Scholz,Kay Scholze,Mikko Sipilä,Gerhard Steiner,Yuri Stozhkov,Christian Tauber,Yee Jun Tham,Miguel Vazquez-Pufleau,Annele Virtanen,Alexander L. Vogel,Alexander L. Vogel,Rainer Volkamer,Robert Wagner,Mingyi Wang,Lena Weitz,Daniela Wimmer,Mao Xiao,Chao Yan,Penglin Ye,Qiaozhi Zha,Xueqin Zhou,Xueqin Zhou,António Amorim,Urs Baltensperger,Armin Hansel,Markku Kulmala,Markku Kulmala,Markku Kulmala,António Tomé,Paul M. Winkler,Douglas R. Worsnop,Neil M. Donahue,Jasper Kirkby,Jasper Kirkby,Joachim Curtius +104 more
TL;DR: In this article, the authors show that isoprene reduces the yield of highly oxygenated dimers with 19 or 20 carbon atoms, which drive particle nucleation and early growth, while increasing the production of dimers having 14 or 15 carbon atoms.
Journal ArticleDOI
Controlled Nitric Oxide Production via O(1D) + N2O Reactions for Use in Oxidation Flow Reactor Studies
Andrew T. Lambe,Paola Massoli,Xuan Zhang,Manjula R. Canagaratna,John B. Nowak,Conner Daube,Chao Yan,Wei Nie,Wei Nie,Timothy B. Onasch,John T. Jayne,Charles E. Kolb,Paul Davidovits,Douglas R. Worsnop,William H. Brune +14 more
TL;DR: In this article, the authors developed a new method that is well suited to the characterization of NOx-dependent secondary organic aerosol (SOA) formation pathways in oxidation flow reactors, using high-resolution time-of-flight chemical ionization mass spectrometer (HR-ToF-CIMS) measurements with nitrate (NO3−) reagent ion.