S
Siegfried Schobesberger
Researcher at University of Eastern Finland
Publications - 117
Citations - 9720
Siegfried Schobesberger is an academic researcher from University of Eastern Finland. The author has contributed to research in topics: Nucleation & Aerosol. The author has an hindex of 31, co-authored 100 publications receiving 7592 citations. Previous affiliations of Siegfried Schobesberger include University of Helsinki & University of Washington.
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Journal ArticleDOI
A large source of low-volatility secondary organic aerosol
Mikael Ehn,Joel A. Thornton,Einhard Kleist,Mikko Sipilä,Heikki Junninen,Iida Pullinen,Monika Springer,Florian Rubach,Ralf Tillmann,Ben H. Lee,Felipe D. Lopez-Hilfiker,S. Andres,Ismail-Hakki Acir,Matti P. Rissanen,Tuija Jokinen,Siegfried Schobesberger,Juha Kangasluoma,Jenni Kontkanen,Tuomo Nieminen,Theo Kurtén,Lasse B. Nielsen,Solvejg Jørgensen,Henrik G. Kjaergaard,Manjula R. Canagaratna,Miikka Dal Maso,Torsten Berndt,Tuukka Petäjä,Andreas Wahner,Veli-Matti Kerminen,Markku Kulmala,Douglas R. Worsnop,Juergen Wildt,Thomas F. Mentel +32 more
TL;DR: It is found that a direct pathway leads from several biogenic VOCs, such as monoterpenes, to the formation of large amounts of extremely low-volatility vapours, helping to explain the discrepancy between the observed atmospheric burden of secondary organic aerosol and that reported by many model studies.
Journal ArticleDOI
Role of sulphuric acid, ammonia and galactic cosmic rays in atmospheric aerosol nucleation
Jasper Kirkby,Joachim Curtius,Joao Almeida,Joao Almeida,Eimear M. Dunne,Jonathan Duplissy,Jonathan Duplissy,Jonathan Duplissy,Sebastian Ehrhart,Alessandro Franchin,Stephanie Gagne,Stephanie Gagne,Luisa Ickes,Andreas Kürten,Agnieszka Kupc,A. Metzger,Francesco Riccobono,Linda Rondo,Siegfried Schobesberger,Georgios Tsagkogeorgas,Daniela Wimmer,António Amorim,F. Bianchi,F. Bianchi,Martin Breitenlechner,A. David,Josef Dommen,Andrew J. Downard,Mikael Ehn,Richard C. Flagan,S. Haider,Armin Hansel,Daniel Hauser,Werner Jud,Heikki Junninen,Fabian Kreissl,Alexander N. Kvashin,Ari Laaksonen,Katrianne Lehtipalo,Jorge Lima,Edward R. Lovejoy,Vladimir Makhmutov,Serge Mathot,Jyri Mikkilä,Pierre Minginette,S. Mogo,Tuomo Nieminen,Antti Onnela,Paulo J. Pereira,Tuukka Petäjä,R. Schnitzhofer,John H. Seinfeld,Mikko Sipilä,Mikko Sipilä,Yuri Stozhkov,Frank Stratmann,António Tomé,Joonas Vanhanen,Yrjö Viisanen,Aron Vrtala,Paul E. Wagner,Hansueli Walther,Ernest Weingartner,Heike Wex,Paul M. Winkler,Kenneth S. Carslaw,Douglas R. Worsnop,Urs Baltensperger,Markku Kulmala +68 more
TL;DR: First results from the CLOUD experiment at CERN are presented, finding that atmospherically relevant ammonia mixing ratios of 100 parts per trillion by volume, or less, increase the nucleation rate of sulphuric acid particles more than 100–1,000-fold and ion-induced binary nucleation of H2SO4–H2O can occur in the mid-troposphere but is negligible in the boundary layer.
Journal ArticleDOI
Direct observations of atmospheric aerosol nucleation.
Markku Kulmala,Jenni Kontkanen,Heikki Junninen,Katrianne Lehtipalo,Hanna E. Manninen,Tuomo Nieminen,Tuomo Nieminen,Tuukka Petäjä,Mikko Sipilä,Siegfried Schobesberger,Pekka Rantala,Alessandro Franchin,Tuija Jokinen,Emma Järvinen,Mikko Äijälä,Juha Kangasluoma,Jani Hakala,P. P. Aalto,Pauli Paasonen,Jyri Mikkilä,Joonas Vanhanen,Juho Aalto,Hannele Hakola,Ulla Makkonen,Taina Ruuskanen,Roy L. Mauldin,Roy L. Mauldin,Jonathan Duplissy,Hanna Vehkamäki,Jaana Bäck,Aki Kortelainen,Ilona Riipinen,Theo Kurtén,Murray V. Johnston,James N. Smith,James N. Smith,Mikael Ehn,Mikael Ehn,Thomas F. Mentel,Kari E. J. Lehtinen,Kari E. J. Lehtinen,Ari Laaksonen,Ari Laaksonen,Veli-Matti Kerminen,Douglas R. Worsnop +44 more
TL;DR: Three separate size regimes below 2-nm diameter are identified that build up a physically, chemically, and dynamically consistent framework on atmospheric nucleation—more specifically, aerosol formation via neutral pathways.
Journal ArticleDOI
Molecular understanding of sulphuric acid-amine particle nucleation in the atmosphere
Joao Almeida,Joao Almeida,Siegfried Schobesberger,Andreas Kürten,Ismael K. Ortega,Oona Kupiainen-Määttä,Arnaud P. Praplan,Alexey Adamov,António Amorim,F. Bianchi,Martin Breitenlechner,A. David,Josef Dommen,Neil M. Donahue,Andrew J. Downard,Eimear M. Dunne,Jonathan Duplissy,Sebastian Ehrhart,Richard C. Flagan,Alessandro Franchin,Roberto Guida,Jani Hakala,Armin Hansel,Martin Heinritzi,Henning Henschel,Tuija Jokinen,Heikki Junninen,Maija Kajos,Juha Kangasluoma,Helmi Keskinen,Agnieszka Kupc,Theo Kurtén,Alexander N. Kvashin,Ari Laaksonen,Ari Laaksonen,Katrianne Lehtipalo,Markus Leiminger,Johannes Leppä,Ville Loukonen,Vladimir Makhmutov,Serge Mathot,Matthew J. McGrath,Tuomo Nieminen,Tuomo Nieminen,Tinja Olenius,Antti Onnela,Tuukka Petäjä,Francesco Riccobono,Ilona Riipinen,Matti P. Rissanen,Linda Rondo,Taina Ruuskanen,Filipe Duarte Santos,Nina Sarnela,Simon Schallhart,R. Schnitzhofer,John H. Seinfeld,Mario Simon,Mikko Sipilä,Mikko Sipilä,Yuri Stozhkov,Frank Stratmann,António Tomé,Jasmin Tröstl,Georgios Tsagkogeorgas,Petri Vaattovaara,Yrjö Viisanen,Annele Virtanen,Aron Vrtala,Paul E. Wagner,Ernest Weingartner,Heike Wex,Christina Williamson,Daniela Wimmer,Daniela Wimmer,Penglin Ye,Taina Yli-Juuti,Kenneth S. Carslaw,Markku Kulmala,Markku Kulmala,Joachim Curtius,Urs Baltensperger,Douglas R. Worsnop,Hanna Vehkamäki,Jasper Kirkby,Jasper Kirkby +85 more
TL;DR: The results show that, in regions of the atmosphere near amine sources, both amines and sulphur dioxide should be considered when assessing the impact of anthropogenic activities on particle formation.
Journal ArticleDOI
The role of low-volatility organic compounds in initial particle growth in the atmosphere
Jasmin Tröstl,Wayne Chuang,Hamish Gordon,Martin Heinritzi,Chao Yan,Ugo Molteni,Lars Ahlm,Carla Frege,F. Bianchi,F. Bianchi,F. Bianchi,Robert Wagner,Mario Simon,Katrianne Lehtipalo,Katrianne Lehtipalo,Christina Williamson,Christina Williamson,Christina Williamson,J. S. Craven,Jonathan Duplissy,Jonathan Duplissy,Alexey Adamov,Joao Almeida,Anne-Kathrin Bernhammer,Martin Breitenlechner,Sophia Brilke,Antonio Dias,Sebastian Ehrhart,Richard C. Flagan,Alessandro Franchin,Claudia Fuchs,Roberto Guida,Martin Gysel,Armin Hansel,Christopher R. Hoyle,Tuija Jokinen,Heikki Junninen,Juha Kangasluoma,Helmi Keskinen,Helmi Keskinen,Helmi Keskinen,Jaeseok Kim,Jaeseok Kim,Manuel Krapf,Andreas Kürten,Ari Laaksonen,Ari Laaksonen,Michael J. Lawler,Michael J. Lawler,Markus Leiminger,Serge Mathot,Ottmar Möhler,Tuomo Nieminen,Tuomo Nieminen,Antti Onnela,Tuukka Petäjä,Felix Piel,Pasi Miettinen,Matti P. Rissanen,Linda Rondo,Nina Sarnela,Siegfried Schobesberger,Siegfried Schobesberger,Kamalika Sengupta,Mikko Sipilä,James N. Smith,James N. Smith,Gerhard Steiner,Gerhard Steiner,Gerhard Steiner,António Tomé,Annele Virtanen,Andrea Christine Wagner,Ernest Weingartner,Ernest Weingartner,Daniela Wimmer,Daniela Wimmer,Paul M. Winkler,Penglin Ye,Kenneth S. Carslaw,Joachim Curtius,Josef Dommen,Jasper Kirkby,Jasper Kirkby,Markku Kulmala,Ilona Riipinen,Douglas R. Worsnop,Douglas R. Worsnop,Neil M. Donahue,Neil M. Donahue,Urs Baltensperger +90 more
TL;DR: It is shown that organic vapours alone can drive nucleation, and a particle growth model is presented that quantitatively reproduces the measurements and implements a parameterization of the first steps of growth in a global aerosol model that can change substantially in response to concentrations of atmospheric cloud concentration nuclei.