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Andreas Wahner
Researcher at Forschungszentrum Jülich
Publications - 195
Citations - 12106
Andreas Wahner is an academic researcher from Forschungszentrum Jülich. The author has contributed to research in topics: Radical & Isoprene. The author has an hindex of 56, co-authored 176 publications receiving 10058 citations. Previous affiliations of Andreas Wahner include Ruhr University Bochum & Cooperative Institute for Research in Environmental Sciences.
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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
Amplified trace gas removal in the troposphere.
Andreas Hofzumahaus,Franz Rohrer,Keding Lu,Keding Lu,Birger Bohn,Theo Brauers,Chih-Chung Chang,Hendrik Fuchs,Frank Holland,Kazuyuki Kita,Yutaka Kondo,Xin Li,Xin Li,Shengrong Lou,Shengrong Lou,Min Shao,Limin Zeng,Andreas Wahner,Yuanhang Zhang +18 more
TL;DR: Concentrations of OH were three to five times greater than expected, and the existence of a pathway for the regeneration of OH independent of NO is proposed, which amplifies the degradation of pollutants without producing ozone.
Journal ArticleDOI
Rapid aerosol particle growth and increase of cloud condensation nucleus activity by secondary aerosol formation and condensation: A case study for regional air pollution in northeastern China
Alfred Wiedensohler,Yafang Cheng,Andreas Nowak,Birgit Wehner,Peggy Achtert,M. Berghof,Wolfram Birmili,Zhijun Wu,Min Hu,Tong Zhu,Nobuyuki Takegawa,Kazuyuki Kita,Yoshiko Kondo,S. Lou,S. Lou,Andreas Hofzumahaus,Frank Holland,Andreas Wahner,Sachin S. Gunthe,Diana Rose,Hang Su,Ulrich Pöschl +21 more
TL;DR: In this article, a new particle formation event in a highly polluted air mass at a regional site south of the megacity Beijing and its impact on the abundance and properties of cloud condensation nuclei (CCN) was investigated.
Rapid aerosol particle growth and increase of cloud condensation nucleus activity by secondary aerosol formation and condensation: A case study for regional air pollution in northeastern China
Alfred Wiedensohler,Yafang Cheng,Andreas Nowak,Birgit Wehner,Peggy Achtert,M. Berghof,Wolfram Birmili,Zhijun Wu,Min Hu,Tong Zhu,Nobuyuki Takegawa,Kazuyuki Kita,Yoshiko Kondo,S. Lou,S. Lou,Andreas Hofzumahaus,Frank Holland,Andreas Wahner,Sachin S. Gunthe,Diana Rose,Hang Su,Ulrich Pöschl +21 more
TL;DR: In this paper, a new particle formation event in a highly polluted air mass at a regional site south of the megacity Beijing and its impact on the abundance and properties of cloud condensation nuclei (CCN) was investigated.
Journal ArticleDOI
Daytime formation of nitrous acid: A major source of OH radicals in a forest
Jörg Kleffmann,Traian Gavriloaiei,Andreas Hofzumahaus,Frank Holland,Ralf Koppmann,L. Rupp,E. Schlosser,M. Siese,Andreas Wahner +8 more
TL;DR: In this paper, the ECHO field campaign in a mixed deciduous forest near Julich, West Germany, in summer 2003 showed clear evidence for a large, yet unexplained, daytime source of HONO (∼500 pptv/h).