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.
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Journal ArticleDOI
Source characterization of highly oxidized multifunctional compounds in a boreal forest environment using positive matrix factorization
Chao Yan,Wei Nie,Wei Nie,Mikko Äijälä,Matti P. Rissanen,Manjula R. Canagaratna,Paola Massoli,Heikki Junninen,Tuija Jokinen,Tuija Jokinen,Nina Sarnela,Silja A. K. Häme,Siegfried Schobesberger,Siegfried Schobesberger,Francesco Canonaco,Lei Yao,André S. H. Prévôt,Tuukka Petäjä,Tuukka Petäjä,Markku Kulmala,Mikko Sipilä,Douglas R. Worsnop,Mikael Ehn +22 more
TL;DR: In this article, a nitrate-ion-based chemical ionization atmospheric-pressure-interface time-of-flight mass spectrometer (CI-APi-TOF) was deployed to measure highly oxidized multifunctional compounds (HOMs) in the boreal forest in Hyytiala, southern Finland.
Journal ArticleDOI
The summertime Boreal forest field measurement intensive (HUMPPA-COPEC-2010): an overview of meteorological and chemical influences
Jonathan Williams,John Crowley,Horst Fischer,Hartwig Harder,Monica Martinez,Tuukka Petäjä,Janne Rinne,Jaana Bäck,Michael Boy,M. Dal Maso,Jani Hakala,Maija Kajos,Petri Keronen,Pekka Rantala,Juho Aalto,Hermanni Aaltonen,Hermanni Aaltonen,Jussi Paatero,Timo Vesala,H. Hakola,Janne Levula,Toivo Pohja,Frank Herrmann,J. Auld,E. Mesarchaki,W. Song,Noureddine Yassaa,Noureddine Yassaa,A. C. Nölscher,A. M. Johnson,A. M. Johnson,T. Custer,Vinayak Sinha,Vinayak Sinha,J. Thieser,N. Pouvesle,Domenico Taraborrelli,Mingjin Tang,Heiko Bozem,Z. Hosaynali-Beygi,R. Axinte,R. Oswald,Anna Novelli,Dagmar Kubistin,K. Hens,Umar Javed,K. Trawny,C. Breitenberger,Pablo Hidalgo,C. J. Ebben,Franz M. Geiger,A. L. Corrigan,Lynn M. Russell,Huug G. Ouwersloot,J. Vilà-Guerau de Arellano,Laurens Ganzeveld,Alexander L. Vogel,M. Beck,A. Bayerle,Christopher J. Kampf,M. Bertelmann,Franziska Köllner,Thorsten Hoffmann,J. Valverde,Daniel Gonzalez,M.-L. Riekkola,Markku Kulmala,Jos Lelieveld +67 more
TL;DR: In this paper, the authors describe the background, instrumentation, goals, and the regional influences on the HUMPPA-COPEC intensive field measurement campaign, conducted at the Boreal forest research station SMEAR II (Station for Measuring Ecosystem-Atmosphere Relation) in Hyytiala, Finland from 12 July-12 August 2010.
Journal ArticleDOI
Ultrafine particles and PM2.5 in the air of cities around the world: Are they representative of each other?
Alma Lorelei de Jesus,Mahmudur Rahman,Mandana Mazaheri,Helen Thompson,Luke D. Knibbs,Cheol-Heon Jeong,Greg J. Evans,Wei Nei,Aijun Ding,Liping Qiao,Li Li,Harri Portin,Jarkko V. Niemi,Hilkka Timonen,Krista Luoma,Tuukka Petäjä,Markku Kulmala,Michał Kowalski,Annette Peters,Josef Cyrys,Luca Ferrero,Maurizio Manigrasso,Pasquale Avino,Giorgio Buonano,Cristina Reche,Xavier Querol,David C. S. Beddows,Roy M. Harrison,Mohammad H. Sowlat,Constantinos Sioutas,Lidia Morawska +30 more
TL;DR: It is demonstrated that a high PNC level does not lead to a high PM2.5, and vice versa, and the need to establish regulatory approaches and control measures to address the impacts of elevated UFP concentrations, especially in urban areas, considering their potential health risks.
Journal ArticleDOI
Measurements of ocean derived aerosol off the coast of California
Timothy S. Bates,Patricia K. Quinn,Amanda A. Frossard,Lynn M. Russell,Jani Hakala,Tuukka Petäjä,Markku Kulmala,D. S. Covert,Christopher D. Cappa,Shao-Meng Li,Katherine Hayden,I. Nuaaman,I. Nuaaman,Robert McLaren,Paola Massoli,Manjula R. Canagaratna,Timothy B. Onasch,Donna Sueper,D. R. Worsnop,William C. Keene +19 more
TL;DR: The Sea Sweep was deployed alongside R/V Atlantis off the coast of California during May of 2010 as mentioned in this paper, where the vessel was used to collect samples from the ocean surface with stainless steel frits and swept into a hood/vacuum hose to feed a suite of aerosol instrumentation.
Journal ArticleDOI
Effects of chemical complexity on the autoxidation mechanisms of endocyclic alkene ozonolysis products: from methylcyclohexenes toward understanding α-pinene.
Matti P. Rissanen,Theo Kurtén,Mikko Sipilä,Joel A. Thornton,Oskari Kausiala,Olga Garmash,Henrik G. Kjaergaard,Tuukka Petäjä,Douglas R. Worsnop,Douglas R. Worsnop,Mikael Ehn,Markku Kulmala +11 more
TL;DR: Dimmer distributions are proposed to form by homogeneous peroxy radical recombination and cross combination reactions, supported by experiments where H atoms were exchanged to D atoms by addition of D2O to the carrier gas flow.