R
Roman Fröhlich
Researcher at Paul Scherrer Institute
Publications - 25
Citations - 1115
Roman Fröhlich is an academic researcher from Paul Scherrer Institute. The author has contributed to research in topics: Aerosol & Particle number. The author has an hindex of 15, co-authored 25 publications receiving 788 citations. Previous affiliations of Roman Fröhlich include Max Planck Society.
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Journal ArticleDOI
The ToF-ACSM: a portable aerosol chemical speciation monitor with TOFMS detection
Roman Fröhlich,Michael J. Cubison,Jay G. Slowik,Nicolas Bukowiecki,André S. H. Prévôt,Urs Baltensperger,Johannes Schneider,Joel R. Kimmel,Marc Gonin,U. Rohner,D. R. Worsnop,J. T. Jayne +11 more
TL;DR: In this article, the authors presented a new instrument for monitoring aerosol composition, the time-of-flight aerosol chemical speciation monitor (ToF-ACSM), which combines precision stateof-the-art mass spectrometry with stability, reliability, and easy handling, which are necessities for long-term monitoring operations on the scale of months to years.
Journal ArticleDOI
ACTRIS ACSM intercomparison - Part 2: Intercomparison of ME-2 organic source apportionment results from 15 individual, co-located aerosol mass spectrometers
Roman Fröhlich,Vincent Crenn,Ari Setyan,Claudio A. Belis,Francesco Canonaco,Olivier Favez,Véronique Riffault,Jay G. Slowik,Wenche Aas,Mikko Äijälä,Andrés Alastuey,B. Artiñano,Nicolas Bonnaire,Carlo Bozzetti,M. Bressi,C. Carbone,Esther Coz,Philip Croteau,Michael J. Cubison,J. K. Esser-Gietl,David C. Green,Valérie Gros,Liine Heikkinen,Hartmut Herrmann,J. T. Jayne,Chris Rene Lunder,María Cruz Minguillón,Griša Močnik,Colin D. O'Dowd,Jurgita Ovadnevaite,Ettore Petralia,Laurent Poulain,Max Priestman,Anna Ripoll,Roland Sarda-Esteve,A. Wiedensohler,Urs Baltensperger,Jean Sciare,Jean Sciare,André S. H. Prévôt +39 more
TL;DR: In this article, the authors report on the results from factor analysis source apportionment by positive matrix factorization (PMF) utilising the multilinear engine 2 (ME-2).
Journal ArticleDOI
Long-term cloud condensation nuclei number concentration, particle number size distribution and chemical composition measurements at regionally representative observatories
Julia Schmale,Silvia Henning,Stefano Decesari,Bas Henzing,Helmi Keskinen,Karine Sellegri,Jurgita Ovadnevaite,Mira L. Pöhlker,Joel Brito,Joel Brito,Aikaterini Bougiatioti,Adam Kristensson,Nikos Kalivitis,Iasonas Stavroulas,Samara Carbone,Anne Jefferson,Minsu Park,Patrick Schlag,Patrick Schlag,Yoko Iwamoto,Yoko Iwamoto,P. P. Aalto,Mikko Äijälä,Nicolas Bukowiecki,Mikael Ehn,Göran Frank,Roman Fröhlich,Arnoud Frumau,Erik Herrmann,Hartmut Herrmann,Rupert Holzinger,Gerard Kos,Markku Kulmala,Nikolaos Mihalopoulos,Athanasios Nenes,Athanasios Nenes,Colin D. O'Dowd,Tuukka Petäjä,David Picard,Christopher Pöhlker,Ulrich Pöschl,Laurent Poulain,André S. H. Prévôt,Erik Swietlicki,Meinrat O. Andreae,Paulo Artaxo,Alfred Wiedensohler,John A. Ogren,Atsushi Matsuki,Seong Soo Yum,Frank Stratmann,Urs Baltensperger,Martin Gysel +52 more
TL;DR: In this article, the authors present a data set of long-term observations of cloud condensation nuclei (CCN) number and number of particles in 12 sites on 3 continents.
Journal ArticleDOI
ACTRIS ACSM intercomparison - Part 1: Reproducibility of concentration and fragment results from 13 individual Quadrupole Aerosol Chemical Speciation Monitors (Q-ACSM) and consistency with co-located instruments
Vincent Crenn,Jean Sciare,Jean Sciare,Philip Croteau,Stéphanie Verlhac,Roman Fröhlich,Claudio A. Belis,Wenche Aas,Mikko Äijälä,Andrés Alastuey,Begoña Artíñano,Dominique Baisnée,Nicolas Bonnaire,M. Bressi,Manjula R. Canagaratna,Francesco Canonaco,C. Carbone,Fabrizia Cavalli,Esther Coz,Michael J. Cubison,Johanna K. Esser-Gietl,David C. Green,Valérie Gros,Liine Heikkinen,Hartmut Herrmann,Chris Rene Lunder,María Cruz Minguillón,Griša Močnik,Colin D. O'Dowd,Jurgita Ovadnevaite,Jean-Eudes Petit,Ettore Petralia,Laurent Poulain,Max Priestman,Véronique Riffault,Anna Ripoll,Roland Sarda-Esteve,Jay G. Slowik,Ari Setyan,Alfred Wiedensohler,Urs Baltensperger,André S. H. Prévôt,John T. Jayne,Olivier Favez +43 more
TL;DR: The first large Quadrupole Aerosol Chemical Speciation Monitor (Q-ACSM) intercomparison study was conducted in the region of Paris for 3 weeks during the late-fall-early-winter period (November-December 2013).
Journal ArticleDOI
Inorganic Salt Interference on CO2+ in Aerodyne AMS and ACSM Organic Aerosol Composition Studies
Simone M. Pieber,Imad El Haddad,Jay G. Slowik,Manjula R. Canagaratna,John T. Jayne,Stephen Matthew Platt,Stephen Matthew Platt,Carlo Bozzetti,Kaspar R. Daellenbach,Roman Fröhlich,Athanasia Vlachou,Felix Klein,Josef Dommen,Branka Miljevic,Jose L. Jimenez,Douglas R. Worsnop,Urs Baltensperger,André S. H. Prévôt +17 more
TL;DR: It is shown that a non-OA CO2+ signal can arise from reactions on the particle vaporizer, ion chamber, or both, induced by thermal decomposition products of inorganic salts, and this effect affects the calculated OA mass, mass spectra, molecular oxygen-to-carbon ratio (O/C), and f44.