T
Tuukka Petäjä
Researcher at University of Helsinki
Publications - 620
Citations - 38508
Tuukka Petäjä is an academic researcher from University of Helsinki. The author has contributed to research in topics: Aerosol & Particle. The author has an hindex of 82, co-authored 526 publications receiving 30572 citations. Previous affiliations of Tuukka Petäjä include Helsinki Institute of Physics & National Center for Atmospheric Research.
Papers
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Journal ArticleDOI
The Synergistic Role of Sulfuric Acid, Bases, and Oxidized Organics Governing New-Particle Formation in Beijing
Chao Yan,Chao Yan,Rujing Yin,Yiqun Lu,Lubna Dada,Dongsen Yang,Yueyun Fu,Jenni Kontkanen,Chenjuan Deng,Olga Garmash,Jiaxin Ruan,Rima Baalbaki,Meredith Schervish,Runlong Cai,Matthew Bloss,Tommy Chan,Tianzeng Chen,Qi Chen,Xuemeng Chen,Yan Chen,Biwu Chu,Biwu Chu,Kaspar Dällenbach,Benjamin Foreback,Xu-Cheng He,Liine Heikkinen,Tuija Jokinen,Heikki Junninen,Heikki Junninen,Juha Kangasluoma,Juha Kangasluoma,Tom V. Kokkonen,Mona Kurppa,Katrianne Lehtipalo,Katrianne Lehtipalo,Haiyan Li,Hui Li,Xiaoxiao Li,Yiliang Liu,Qingxin Ma,Pauli Paasonen,Pekka Rantala,Rosaria E. Pileci,Anton Rusanen,Nina Sarnela,Pauli Simonen,Shixian Wang,Weigang Wang,Yonghong Wang,Mo Xue,Gan Yang,Lei Yao,Ying Zhou,Joni Kujansuu,Joni Kujansuu,Tuukka Petäjä,Tuukka Petäjä,Tuukka Petäjä,Wei Nie,Yan Ma,Maofa Ge,Hong He,Neil M. Donahue,Douglas R. Worsnop,Veli-Matti Kerminen,Lin Wang,Yongchun Liu,Jun Zheng,Markku Kulmala,Markku Kulmala,Markku Kulmala,Jingkun Jiang,F. Bianchi,F. Bianchi +73 more
TL;DR: In this article, the authors performed detailed analyses on sulfuric acid cluster composition and budget, as well as the chemical and physical properties of oxidized organic molecules (OOMs) to understand the key species and governing processes of new particle formation in polluted urban environments.
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Determination of the biogenic secondary organic aerosol fraction in the boreal forest by NMR spectroscopy
E. Finessi,E. Finessi,Stefano Decesari,Marco Paglione,L. Giulianelli,C. Carbone,Stefania Gilardoni,Sandro Fuzzi,Sanna Saarikoski,Tomi Raatikainen,Tomi Raatikainen,Risto Hillamo,James Allan,Th. F. Mentel,Petri Tiitta,Petri Tiitta,Ari Laaksonen,Ari Laaksonen,Tuukka Petäjä,Markku Kulmala,D. R. Worsnop,D. R. Worsnop,Maria Cristina Facchini +22 more
TL;DR: In this paper, the sources of fine organic aerosol (OA) in the boreal forest, based on measurements including both filter sampling (PM1) and online methods and carried out during a one-month campaign held in Hyytiala, Finland, in spring 2007.
Journal ArticleDOI
Genotype and spatial structure shape pathogen dispersal and disease dynamics at small spatial scales.
TL;DR: By combining laboratory inoculations with wind tunnel and field trials using the wind-dispersed pathogen Podosphaera plantaginis, striking genetic variation affecting the unexplored microscale (< 2 m) of epidemics is demonstrated and confirms that these traits may be targeted by selection.
Journal Article
Ion and particle number concentrations and size distributions along the Trans-Siberian railroad
Eija Vartiainen,Markku Kulmala,Mikael Ehn,Anne Hirsikko,Heikki Junninen,Tuukka Petäjä,Larisa Sogacheva,Sanna Kuokka,Risto Hillamo,Andrey Skorokhod,I. B. Belikov,Nikolai Elansky,Veli-Matti Kerminen +12 more
TL;DR: The purpose was to get new insight on number concentrations of aerosol particle and air ions in different parts of Russia, and to examine which sources and sinks affected the observed concentrations.
Journal ArticleDOI
On the interpretation of the loading correction of the aethalometer
Aki Virkkula,Xuguang Chi,Aijun Ding,Yicheng Shen,Wei Nie,Wei Nie,Ximeng Qi,Longfei Zheng,Xin Huang,Yuning Xie,Jiaping Wang,Tuukka Petäjä,Markku Kulmala +12 more
TL;DR: In this paper, the aethalometer compensation parameter k, calculated with the Virkkula et al. (2007) method depended on the backscatter fraction, measured with an independent method, the integrating nephelometer.