Tuukka Petäjä
University of Helsinki
671 Papers
1.7K Citations
Tuukka Petäjä is an academic researcher from University of Helsinki. The author has contributed to research in topics: Aerosol & Chemistry. The author has an hindex of 82, co-authored 526 publications. Previous affiliations of Tuukka Petäjä include Helsinki Institute of Physics & National Center for Atmospheric Research.
Chat about Author
Papers
Atmospheric sulphuric acid and neutral cluster measurements using CI-APi-TOF
Tuija Jokinen,Mikko Sipilä,Heikki Junninen,Mikael Ehn,Gustaf Lönn,Jani Hakala,Tuukka Petäjä,Roy L. Mauldin,Roy L. Mauldin,Markku Kulmala,D. R. Worsnop +10 more
TL;DR: In this paper, the first ambient measurements using nitrate ion based Chemical Ionization with the Atmospheric Pressure interface Time-Of-Flight mass spectrometer (CI-APi-TOF) for sulphuric acid and neutral cluster detection are presented.
Contrasting trends of PM2.5 and surface-ozone concentrations in China from 2013 to 2017
Yonghong Wang,Yonghong Wang,Wenkang Gao,Shuai Wang,Tao Song,Zhengyu Gong,Dongsheng Ji,Lili Wang,Lili Wang,Zirui Liu,Guiqian Tang,Yanfeng Huo,Shili Tian,Jiayun Li,Mingge Li,Yuan Yang,Biwu Chu,Biwu Chu,Tuukka Petäjä,Veli-Matti Kerminen,Hong He,Jiming Hao,Markku Kulmala,Yuesi Wang,Yuanhang Zhang +24 more
TL;DR: It is demonstrated that the Chinese government was successful in the reduction of particulate matter in urban areas from 2013 to 2017, although the ozone concentration has increased significantly, suggesting a more complex mechanism of improving Chinese air quality in the future.
Molecular understanding of atmospheric particle formation from sulfuric acid and large oxidized organic molecules
Siegfried Schobesberger,Heikki Junninen,F. Bianchi,Gustaf Lönn,Mikael Ehn,Katrianne Lehtipalo,Josef Dommen,Sebastian Ehrhart,Ismael K. Ortega,Alessandro Franchin,Tuomo Nieminen,Francesco Riccobono,Manuel Hutterli,Jonathan Duplissy,Joao Almeida,António Amorim,Martin Breitenlechner,Andrew J. Downard,Eimear M. Dunne,Eimear M. Dunne,Richard C. Flagan,Maija Kajos,Helmi Keskinen,Jasper Kirkby,Agnieszka Kupc,Andreas Kürten,Theo Kurtén,Ari Laaksonen,Ari Laaksonen,Serge Mathot,Antti Onnela,Arnaud P. Praplan,Linda Rondo,Filipe Duarte Santos,Simon Schallhart,R. Schnitzhofer,Mikko Sipilä,António Tomé,Georgios Tsagkogeorgas,Hanna Vehkamäki,Daniela Wimmer,Daniela Wimmer,Urs Baltensperger,Kenneth S. Carslaw,Joachim Curtius,Armin Hansel,Tuukka Petäjä,Markku Kulmala,Neil M. Donahue,Douglas R. Worsnop +49 more
TL;DR: High-resolution mass spectra of ion clusters observed during new particle formation experiments performed at the Cosmics Leaving Outdoor Droplets chamber at the European Organization for Nuclear Research confirm that oxidized organics are involved in both the formation and growth of particles under ambient conditions.
432
Sulfuric acid and OH concentrations in a boreal forest site
Tuukka Petäjä,Tuukka Petäjä,Roy L. Mauldin,E. Kosciuch,J. McGrath,J. McGrath,Tuomo Nieminen,Pauli Paasonen,Michael Boy,Alexey Adamov,Tapio Kotiaho,Markku Kulmala +11 more
TL;DR: In this paper, the gas-phase sulfuric acid and ozone concentration were measured in Hyytiala, SMEAR II station, Southern Finland during 24 March to 28 June 2007.
Ozone and fine particle in the western Yangtze River Delta: an overview of 1 yr data at the SORPES station
Aijun Ding,Congbin Fu,Xiu-Qun Yang,Jianqi Sun,Longfei Zheng,Yuning Xie,Erik Herrmann,Erik Herrmann,Wei Nie,Tuukka Petäjä,V.-M. Kerminen,Markku Kulmala +11 more
TL;DR: In this article, the authors present an overview of 1 yr measurements of ozone (O3) and fine particular matter (PM2.5) and related trace gases at a recently developed regional background site, the Station for Observing Regional Processes of the Earth System (SORPES), in the western part of the Yangtze River Delta (YRD) in eastern China.