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Your search keyword '"Grosselin, B."' showing total 4 results
Start Over Author "Grosselin, B." Topic [sdu.ocean]sciences of the universe [physics]/ocean, atmosphere
4 results on '"Grosselin, B."'

1. Intercomparison of peroxy radical instruments at the HELIOS atmospheric simulation chamber

Author

LAHIB, A., Duncianu, M., TOMAS, A., SCHOEMAECKER, C., Batut, S., KUKUI, A., Ren, Y., Zhou, L., Benoit, R., Grosselin, B., Daele, V., Mellouki, A., STEVENS, P., Dusanter, S., KUKUI, Alexandre, IMT Lille Douai, Institut Mines-Télécom, Univ. Lille, Centre for Materials and Processes, F-59000 Lille, France, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut des Sciences de l'Ingénierie et des Systèmes (INSIS), Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Lille Douai), Institut Mines-Télécom [Paris] (IMT), Université des Sciences et Technologies (Lille 1) (USTL), Ford Motor Company, Research and Advanced Engineering, Mail Drop RIC-2122, Dearborn, Michigan 48121-2053, USA, INDIANA UNIVERSITY SCHOOL OF PUBLIC AND ENVIRONMENTAL AFFAIRS BLOOMINGTON USA, Partenaires IRSTEA, and Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)

Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, 0341 Middle atmosphere: constituent transport and chemistry, 0305 Aerosols and particles, 0317 Chemical kinetic and photochemical properties, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, 0312 Air/sea constituent fluxes, [INFO]Computer Science [cs], ATMOSPHERIC COMPOSITION AND STRUCTURE, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; Peroxy radicals (HO 2 and RO 2 ) are key species in atmospheric chemistry, which together with the hydroxyl radical (OH), are involved in oxidation processes leading to the formation of secondary pollutants such as ozone and organic aerosols. Monitoring these short-lived species during intensive field campaigns and comparing the measured concentrations to box model simulations allow assessing the reliability of chemical mechanisms implemented in atmospheric models. However, ambient measurements of peroxy radicals are still considered challenging and only a few techniques have been used for field measurements. Three complementary instruments capable of ambient measurements of pe roxy radicals have been deployed together at the HELIOS atmospheric simulation chamber (Orléans, France) in October 2018. These instruments rely on the PEroxy Radical Chemical Amplification (PERCA), Laser Induced Fluorescence-Fluorescent Assay by Gas Expansion (LIF-FAGE), and Chemical Ionisation Mass Spectrometry (CIMS) techniques. Several chamber experiments have been conducted under dark and irradiated conditions, including oxidation experiments of dihydrogen, methane, pentene, isoprene, and α-pinene. In this presentation, the agreement between the different instruments will be discussed in the light of supporting measurements of volatile organic compounds and inorganic species (O3, NO, NO2), photolysis frequencies, as well as box modelling of the chamber chemistry.

Published
2019

2. On-road measurements of VOCs and NOx: determination of light-duty vehicles emission factors from tunnel studies in Brussel city center, 5th Sino-French Joint Workshop on Atmospheric Environment

Author

Ait-Hetal, W., Beeldens, A., Boonen, E., Borbon, A., Boreave, A., Cazaunau, M., Chen, H., Daële, Véronique, Dupart, Y., Gaimoz, C., Gallus, M., George, C., Grand, N., Grosselin, B., Hermann, H., Ifang, S., Kurtenbach, R., Maille, M., Marjanovic, I., Mellouki, A., Miet, K., Mothes, F., Poulain, L., Rabe, R., Zapf, P., Kleffmann, J., Doussin, J-F, Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut des Sciences de l'Ingénierie et des Systèmes (INSIS), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), IRCELYON-C'Durable (CDURABLE), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Leibniz Institute for Tropospheric Research (TROPOS), Bergische Universität Wuppertal, and Daele, Veronique

Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

3. Comparison of methods for the determination of NO-O3-NO2 fluxes and chemical interactions over a bare soil

Author

Stella, P, Loubet, B, Laville, P, Lamaud, E, Cazaunau, M, Laufs, S, Bernard, F, Grosselin, B, Mascher, N, Kurtenbach, R, Mellouki, Abdelwahid, Kleffmann, J, Cellier, Peggy, Environnement et Grandes Cultures (EGC), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Écologie fonctionnelle et physique de l'environnement (EPHYSE - UR1263), Institut National de la Recherche Agronomique (INRA), Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut des Sciences de l'Ingénierie et des Systèmes (INSIS), Physikalische Chemie, Bergische Universität Wuppertal, German project PHOTONA (CNRS/INSU/DFG), the French regional funding R2DS (r´egion Ile-de-France), ANR: VULNOZ,VULNOZ, European Project: 38717,NITROEUROPE IP, AgroParisTech-Institut National de la Recherche Agronomique (INRA), Écologie fonctionnelle et physique de l'environnement (EPHYSE), Institut National de la Recherche Agronomique (INRA)-Institut National Agronomique Paris-Grignon (INA P-G), Unité de bioclimatologie, University of Wuppertal, and Physikalische Chemie/FB C

Subjects
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, nitric-oxide emission, stomatal uptake, lcsh:TA715-787, lcsh:Earthwork. Foundations, water-vapor, boundary-layer, reactive nitrogen, carbon-dioxide, atmospheric surface-layer, ozone dry deposition, eddy covariance, gradient relationships, lcsh:Environmental engineering, [SDE]Environmental Sciences, [CHIM]Chemical Sciences, lcsh:TA170-171, ComputingMilieux_MISCELLANEOUS
Abstract

Tropospheric ozone (O3) is a known greenhouse gas responsible for impacts on human and animal health and ecosystem functioning. In addition, O3 plays an important role in tropospheric chemistry, together with nitrogen oxides. The determination of surface-atmosphere exchange fluxes of these trace gases is a prerequisite to establish their atmospheric budget and evaluate their impact onto the biosphere. In this study, O3, nitric oxide (NO) and nitrogen dioxide (NO2) fluxes were measured using the aerodynamic gradient method over a bare soil in an agricultural field. Ozone and NO fluxes were also measured using eddy-covariance and automatic chambers, respectively. The aerodynamic gradient measurement system, composed of fast response sensors, was capable to measure significant differences in NO and O3 mixing ratios between heights. However, due to local advection, NO2 mixing ratios were highly non-stationary and NO2 fluxes were, therefore, not significantly different from zero. The chemical reactions between O3, NO and NO2 led to little ozone flux divergence between the surface and the measurement height (less than 1% of the flux on average), whereas the NO flux divergence was about 10% on average. The use of fast response sensors allowed reducing the flux uncertainty. The aerodynamic gradient and the eddy-covariance methods gave comparable O3 fluxes. The chamber NO fluxes were down to 70% lower than the aerodynamic gradient fluxes, probably because of either the spatial heterogeneity of the soil NO emissions or the perturbation due to the chamber itself.

Published
2012
Full Text
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4. Atmospheric Measurement Techniques Comparison of methods for the determination of NO-O 3 -NO 2 fluxes and chemical interactions over a bare soil

Author

Stella, P, Loubet, B, Laville, P, Lamaud, E, Cazaunau, M, Laufs, S, Bernard, F, Grosselin, B, Mascher, N, Kurtenbach, R, Mellouki, Abdelwahid, Kleffmann, J, Cellier, Peggy, Environnement et Grandes Cultures (EGC), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Écologie fonctionnelle et physique de l'environnement (EPHYSE - UR1263), Institut National de la Recherche Agronomique (INRA), Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut des Sciences de l'Ingénierie et des Systèmes (INSIS), Physikalische Chemie, Bergische Universität Wuppertal, German project PHOTONA (CNRS/INSU/DFG), the French regional funding R2DS (r´egion Ile-de-France), ANR: VULNOZ,VULNOZ, European Project: 38717,NITROEUROPE IP, and AgroParisTech-Institut National de la Recherche Agronomique (INRA)

Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDE]Environmental Sciences
Abstract

International audience; Tropospheric ozone (O 3) is a known greenhouse gas responsible for impacts on human and animal health and ecosystem functioning. In addition, O 3 plays an important role in tropospheric chemistry, together with nitrogen oxides. The determination of surface-atmosphere exchange fluxes of these trace gases is a prerequisite to establish their atmospheric budget and evaluate their impact onto the biosphere. In this study, O 3 , nitric oxide (NO) and nitrogen dioxide (NO 2) fluxes were measured using the aerodynamic gradient method over a bare soil in an agricultural field. Ozone and NO fluxes were also measured using eddy-covariance and automatic chambers, respectively. The aerodynamic gradient measurement system, composed of fast response sensors , was capable to measure significant differences in NO and O 3 mixing ratios between heights. However, due to local advection, NO 2 mixing ratios were highly non-stationary and NO 2 fluxes were, therefore, not significantly different from zero. The chemical reactions between O 3 , NO and NO 2 led to little ozone flux divergence between the surface and the measurement height (less than 1 % of the flux on average), whereas the NO flux divergence was about 10 % on average. The use of fast response sensors allowed reducing the flux uncertainty. The aerodynamic gradient and the eddy-covariance methods gave comparable O 3 fluxes. The chamber NO fluxes were down to 70 % lower than the aerodynamic gradient fluxes, probably because of either the spatial heterogeneity of the soil NO emissions or the perturbation due to the chamber itself.

Published
2012
Full Text
View/download PDF

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