C
Charbel Afif
Researcher at Saint Joseph's University
Publications - 53
Citations - 1427
Charbel Afif is an academic researcher from Saint Joseph's University. The author has contributed to research in topics: Emission inventory & Air quality index. The author has an hindex of 17, co-authored 46 publications receiving 1026 citations. Previous affiliations of Charbel Afif include Paris Diderot University & University of Paris.
Papers
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Journal ArticleDOI
Unexpectedly high indoor hydroxyl radical concentrations associated with nitrous acid
Elena Gómez Alvarez,Damien Amedro,Damien Amedro,Charbel Afif,Charbel Afif,Sasho Gligorovski,Coralie Schoemaecker,Christa Fittschen,Jean-François Doussin,Henri Wortham +9 more
TL;DR: It is shown that photolysis of HONO is an important source of OH radicals indoors under certain conditions (i.e., direct solar irradiation inside the room) and the OH concentrations were found to follow a linear dependence with the product J(HonO)⋅[HONO].
Journal ArticleDOI
Study of the unknown HONO daytime source at a European suburban site during the MEGAPOLI summer and winter field campaigns
Vincent Michoud,Aurélie Colomb,Agnès Borbon,K. Miet,Matthias Beekmann,Marie Camredon,Bernard Aumont,Sébastien Perrier,P. Zapf,Guillaume Siour,W. Ait-Helal,W. Ait-Helal,Charbel Afif,Alexandre Kukui,Markus Furger,Jean-Charles Dupont,Martial Haeffelin,Jean-François Doussin +17 more
TL;DR: Michoud et al. as mentioned in this paper used photostationary state (PSS) approach to calculate the HONO levels of the unknown source during the MEGAPOLI field campaigns at SIRTA observatory in Paris surroundings.
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Volatile and intermediate volatility organic compounds in suburban Paris: Variability, origin and importance for SOA formation
Warda Ait-Helal,Warda Ait-Helal,Warda Ait-Helal,Agnès Borbon,Stéphane Sauvage,Stéphane Sauvage,J. A. de Gouw,J. A. de Gouw,Aurélie Colomb,Valérie Gros,F. Freutel,Monica Crippa,Charbel Afif,Charbel Afif,Urs Baltensperger,Matthias Beekmann,Jean-François Doussin,R. Durand-Jolibois,Isabelle Fronval,Isabelle Fronval,Noël Grand,Thierry Léonardis,Thierry Léonardis,M. Lopez,Vincent Michoud,K. Miet,Sébastien Perrier,Sébastien Perrier,André S. H. Prévôt,Jodi Schneider,Guillaume Siour,P. Zapf,Nadine Locoge,Nadine Locoge +33 more
TL;DR: Ait-Helal et al. as discussed by the authors investigated the role of primary anthropogenic gaseous compounds in regional SOA formation by estimating the SOA mass concentration expected from the anthropogenic VOCs and IVOCs (I/VOCs) measured at SIRTA.
Journal ArticleDOI
Chemical and aerosol characterisation of the troposphere over West Africa during the monsoon period as part of AMMA
Claire E. Reeves,Paola Formenti,Charbel Afif,Charbel Afif,Gérard Ancellet,Jean-Luc Attié,Joelle Bechara,Agnès Borbon,Francesco Cairo,Hugh Coe,Suzanne Crumeyrolle,Federico Fierli,Cyrille Flamant,L. Gomes,Thomas Hamburger,Corinne Jambert,Kathy S. Law,Céline Mari,Roderic L. Jones,Atsushi Matsuki,Atsushi Matsuki,M. I. Mead,John Methven,Graham P. Mills,Andreas Minikin,Jennifer G. Murphy,Jennifer G. Murphy,Johannes K. Nielsen,David E. Oram,Douglas J. Parker,Andreas Richter,Hans Schlager,Alfons Schwarzenboeck,Valérie Thouret +33 more
TL;DR: In this paper, five aircraft took part in a campaign over West Africa to observe the aerosol content and chemical composition of the troposphere and lower stratosphere as part of the African Monsoon Multidisciplinary Analysis (AMMA).
Journal ArticleDOI
Radical budget analysis in a suburban European site during the MEGAPOLI summer field campaign
Vincent Michoud,Alexandre Kukui,Alexandre Kukui,Marie Camredon,Aurélie Colomb,Agnès Borbon,K. Miet,Bernard Aumont,Matthias Beekmann,R. Durand-Jolibois,Sébastien Perrier,Sébastien Perrier,P. Zapf,Guillaume Siour,Warda Ait-Helal,Warda Ait-Helal,Warda Ait-Helal,Nadine Locoge,Nadine Locoge,Stéphane Sauvage,Stéphane Sauvage,Charbel Afif,Charbel Afif,Valérie Gros,Markus Furger,Gérard Ancellet,Jean-François Doussin +26 more
TL;DR: In this paper, a photochemical box model based on the Master Chemical Mechanism (MCM) and constrained by ancillary measurements was run to calculate radical concentrations, which led to significant differences in simulated radical concentrations.