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8 results on '"Aline Gratien"'

1. Atmospheric reactivity of biogenic volatile organic compounds in a maritime pine forest during the LANDEX episode 1 field campaign

Author

Eric Villenave, Vincent Michoud, Nadine Locoge, Julien Kammer, Stéphane Sauvage, Mohamad Al Ajami, Sebastien Batut, Sandy Bsaibes, Aline Gratien, Thierry Léonardis, Pierre-Marie Flaud, Valérie Gros, Emilie Perraudin, Sebastien Dusanter, François Truong, Kenneth Mermet, Jean-François Doussin, Manuela Cirtog, Christophe Hecquet, Coralie Schoemaecker, Centre for Energy and Environment (CERI EE), Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Lille Douai), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Institut Mines-Télécom [Paris] (IMT), Environnements et Paléoenvironnements OCéaniques (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 (PC2A), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Chimie Atmosphérique Expérimentale (CAE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Centre for Energy and Environment (CERI EE - IMT Nord Europe), Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Nord Europe), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and ANR-10-LABX-0045,COTE,COntinental To coastal Ecosystems: evolution, adaptability and governance(2010)

Subjects
Environmental Engineering, Ozone, 010504 meteorology & atmospheric sciences, 010501 environmental sciences, 01 natural sciences, chemistry.chemical_compound, Nitrate, Linalool, Environmental Chemistry, Waste Management and Disposal, Isoprene, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, biology, 15. Life on land, biology.organism_classification, Pollution, Trace gas, chemistry, 13. Climate action, Environmental chemistry, Myrcene, [SDE]Environmental Sciences, Pinus pinaster, Camphene, Environmental science
Abstract

Trace gas measurements were performed during the LANDEX (the LANDes EXperiment) Episode 1 field campaign in the summer 2017, in one of the largest European maritime pine forests (> 95% Pinus pinaster) located in southwestern France. Efforts have been focused on obtaining a good speciation of 20 major biogenic volatile organic compounds (BVOCs, including pinenes, carenes, terpinenes, linalool, camphene, etc.). This was made possible by the development of a new and specific chromatographic method. In order to assess the role of BVOCs in the local gas phase chemistry budget, their reactivity with the main atmospheric oxidants (hydroxyl radicals (OH), ozone (O3) and nitrate radicals (NO3)) and the corresponding consumption rates were determined. When considering the OH reactivity with BVOCs, isoprene and linalool accounted for 10-47% of the OH depletion during daytime, and monoterpenes for 50-65%, whereas monoterpenes were the main contributors during the night (70-85%). Sesquiterpenes and monoterpenes were the main contributors to the ozone reactivity, especially β-caryophyllene (30-70%), with a maximum contribution during nighttime. Nighttime nitrate reactivity was predominantly due to monoterpenes (i.e. 90-95%). Five specific groups have been proposed to classify the 19 BVOCs measured in the forest, according to their reactivity with atmospheric oxidants and their concentrations. The total amount of BVOCs consumed under and above the forest canopy was evaluated for 7 BVOCs (i.e. isoprene, α-pinene, β-pinene, myrcene, limonene + cis-ocimene and Δ3-carene). The reactivity of atmospheric oxidants and BVOCs at a local level are discussed in order to highlight the compounds (BVOCs, other VOCs), the atmospheric oxidants and the main associated reactive processes observed under the canopy of a maritime pine forest.

Published
2021
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2. Glyoxal's impact on dry ammonium salts: fast and reversible surface aerosol browning

Author

Natalie G. Jimenez, L. N. Hawkins, David O. De Haan, Hannah G. Welsh, Mathieu Cazaunau, Jean-François Doussin, Aline Gratien, Paola Formenti, Margaret A. Tolbert, Kevin Jansen, Raunak Pednekar, Edouard Pangui, Antonin Bergé, Alexia de Loera, Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), and Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)

Subjects
Atmospheric Science, Ammonium sulfate, 010504 meteorology & atmospheric sciences, Analytical chemistry, 010501 environmental sciences, Radiative forcing, 01 natural sciences, complex mixtures, lcsh:QC1-999, Aerosol, lcsh:Chemistry, Absorbance, chemistry.chemical_compound, lcsh:QD1-999, chemistry, 13. Climate action, Sodium sulfate, [SDE]Environmental Sciences, Sulfate aerosol, Relative humidity, Sulfate, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, lcsh:Physics, 0105 earth and related environmental sciences
Abstract

Alpha-dicarbonyl compounds are believed to form brown carbon in the atmosphere via reactions with ammonium sulfate (AS) in cloud droplets and aqueous aerosol particles. In this work, brown carbon formation in AS and other aerosol particles was quantified as a function of relative humidity (RH) during exposure to gas-phase glyoxal (GX) in chamber experiments. Under dry conditions (RH 2 and are consistent between AS and AS–glycine aerosol. Dry methylammonium sulfate aerosol browns 4 times more than dry AS aerosol, but deliquesced AS aerosol browns much less than dry AS aerosol. Optical measurements at 405, 450, and 530 nm provide an estimated Ångstrom absorbance coefficient of -16±4. This coefficient and the empirical relationship between GX and albedo are used to estimate an upper limit to global radiative forcing by brown carbon formed by 70 ppt GX reacting with AS (+7.6×10-5 W m−2). This quantity is

Published
2020
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3. Secondary organic aerosol formation from isoprene photooxidation during cloud condensation–evaporation cycles

Author

Mathieu Cazaunau, F. Siekmann, H. L. Dewitt, Anne Monod, Vincent Michoud, Jean-François Doussin, L. Bregonzio-Rozier, Andrea Tapparo, S. B. Morales, Edouard Pangui, Brice Temime-Roussel, Chiara Giorio, Aline Gratien, 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), Department of Chemistry [Cambridge, UK], University of Cambridge [UK] (CAM), Laboratoire Chimie de l'environnement (LCE), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1 (UB)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Scienze Chimiche [Padova], Università degli Studi di Padova = University of Padua (Unipd), Aix Marseille Université (AMU), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Giorio, Chiara [0000-0001-7821-7398], Apollo - University of Cambridge Repository, Universita degli Studi di Padova, Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), and Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Atmospheric Science, 010504 meteorology & atmospheric sciences, Evaporation, 010501 environmental sciences, Photochemistry, complex mixtures, behavioral disciplines and activities, 7. Clean energy, 01 natural sciences, lcsh:Chemistry, chemistry.chemical_compound, Mass concentration (chemistry), Dissolution, NOx, Isoprene, 0105 earth and related environmental sciences, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Aqueous solution, Condensation, 37 Earth Sciences, lcsh:QC1-999, Aerosol, lcsh:QD1-999, chemistry, [SDU]Sciences of the Universe [physics], 13. Climate action, 3701 Atmospheric Sciences, sense organs, [CHIM.OTHE]Chemical Sciences/Other, lcsh:Physics
Abstract

The impact of cloud events on isoprene secondary organic aerosol (SOA) formation has been studied from an isoprene/NOx/light system in an atmospheric simulation chamber. It was shown that the presence of a liquid water cloud leads to a faster and higher SOA formation than under dry conditions. When a cloud is generated early in the photooxidation reaction, before any SOA formation has occurred, a fast SOA formation is observed with mass yields ranging from 0.002 to 0.004. These yields are two and four times higher than those observed under dry conditions. When the cloud is generated at a later photooxidation stage, after isoprene SOA is stabilized at its maximum mass concentration, a rapid increase (by a factor of two or higher) of the SOA mass concentration is observed. The SOA chemical composition is influenced by cloud generation: the additional SOA formed during cloud events is composed of both organics and nitrate containing species. This SOA formation can be linked to water soluble volatile organic compounds (VOCs) dissolution in the aqueous phase and to further aqueous phase reactions. Cloud-induced SOA formation is experimentally demonstrated in this study, thus highlighting the importance of aqueous multiphase systems in atmospheric SOA formation estimations.

Published
2016
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4. Cloud Processing of Secondary Organic Aerosol from Isoprene and Methacrolein Photooxidation

Author

Andrea Tapparo, Arthur T. Zielinski, Helen Langley DeWitt, Jean-François Doussin, Magda Claeys, Markus Kalberer, Mathieu Cazaunau, Didier Voisin, Lola Brégonzio-Rozier, Vincent Michoud, Aline Gratien, Reinhilde Vermeylen, Sylvain Ravier, Edouard Pangui, Brice Temime-Roussel, Chiara Giorio, Anne Monod, Department of Chemistry (Cambridge], University of Cambridge [UK] (CAM), Laboratoire Chimie de l'environnement (LCE), Aix Marseille Université (AMU)-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), Dipartimento di Scienze Chimiche [Padova], Università degli Studi di Padova = University of Padua (Unipd), Department of Pharmaceutical Sciences, University of Antwerp (UA), Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K, Universita degli Studi di Padova, Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS), Laboratoire de glaciologie et géophysique de l'environnement (LGGE), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)

Subjects
010504 meteorology & atmospheric sciences, Analytical chemistry, Methacrolein, 010501 environmental sciences, Mass spectrometry, 7. Clean energy, 01 natural sciences, complex mixtures, Article, chemistry.chemical_compound, Metastability, Relative humidity, Physical and Theoretical Chemistry, Isoprene, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Aqueous solution, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Physics, Energy budget, [SDE.ES]Environmental Sciences/Environmental and Society, Aerosol, Chemistry, chemistry, 13. Climate action, Environmental chemistry, sense organs
Abstract

Aerosol-cloud interaction contributes to the largest uncertainties in the estimation and interpretation of the Earth's changing energy budget. The present study explores experimentally the impacts of water condensation-evaporation events, mimicking processes occurring, in atmospheric clouds, on the molecular composition of secondary organic aerosol (SOA) from the photooxidation of methacrolein. A range of on and off-line mass spectrometry techniques were used to obtain a detailed chemical characterization of SOA formed in control experiments in dry conditions, in triphasic experiments simulating gas-particle-cloud droplet interactions (starting from dry conditions and from 60% relative humidity (RH)), and in bulk aqueous-phase experiments. We observed that cloud events trigger fast SOA formation accompanied by evaporative losses. These evaporative losses decreased SOA concentration in the simulation chamber by 25-32% upon RH increase, while aqueous SOA was found to be metastable and slowly evaporated after cloud dissipation. In the simulation chamber, SOA composition measured with a high-resolution time-of flight aerosol mass spectrometer, did not change during cloud events compared with high RH conditions (RH > 80%). In all experiments, off-line mass spectrometry techniques emphasize the critical role of 2-methylglyceric acid as a major product of isoprene chemistry, as an important contributor to the total SOA mass (15-20%) and as a key building block of oligomers found in the particulate phase. Interestingly, the comparison between the series of oligomers obtained from experiments performed under different conditions show a markedly different reactivity. In particular, long reaction times at high RH seem to create the conditions for aqueous-phase processing to occur in a more efficient manner than during two relatively short cloud events.

Published
2017
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5. Multiphase Photochemistry of Pyruvic Acid under Atmospheric Conditions

Author

Allison E. Reed Harris, Jean-François Doussin, Elizabeth C. Griffith, Aline Gratien, Mathieu Cazaunau, Anne Monod, Edouard Pangui, Aki Pajunoja, Annele Virtanen, Veronica Vaida, 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), Laboratoire Chimie de l'environnement (LCE), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), University of Eastern Finland, Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)

Subjects
Aqueous solution, 010504 meteorology & atmospheric sciences, Photodissociation, 010402 general chemistry, Photochemistry, 01 natural sciences, 0104 chemical sciences, Aerosol, chemistry.chemical_compound, Acetic acid, chemistry, 13. Climate action, Phase (matter), Carbon dioxide, [SDE]Environmental Sciences, [CHIM]Chemical Sciences, Reactivity (chemistry), Pyruvic acid, Physical and Theoretical Chemistry, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences
Abstract

Aerosol and molecular processing in the atmosphere occurs in a complex and variable environment consisting of multiple phases and interfacial regions. To explore the effects of such conditions on the reactivity of chemical systems, we employ an environmental simulation chamber to investigate the multiphase photolysis of pyruvic acid, which photoreacts in the troposphere in aqueous particles and in the gas phase. Upon irradiation of nebulized pyruvic acid, acetic acid and carbon dioxide are rapidly generated, which is consistent with previous literature on the bulk phase photolysis reactions. Additionally, we identify a new C6 product, zymonic acid, a species that has not previously been reported from pyruvic acid photolysis under any conditions. Its observation here, and corresponding spectroscopic signatures, indicates it could be formed by heterogeneous reactions at the droplet surface. Prior studies of the aqueous photolysis of pyruvic acid have shown that high-molecular-weight compounds are formed via...

Published
2017
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6. New Laboratory Intercomparison of the Ozone Absorption Coefficients in the Mid-infrared (10 μm) and Ultraviolet (300−350 nm) Spectral Regions

Author

Jean-Marie Flaud, Jean-François Doussin, Aline Gratien, Johannes Orphal, and Bénédicte Picquet-Varrault

Subjects
Ozone, 010304 chemical physics, 010504 meteorology & atmospheric sciences, Mid infrared, medicine.disease_cause, Atmospheric sciences, 01 natural sciences, chemistry.chemical_compound, chemistry, 13. Climate action, Spectroscopy, Fourier Transform Infrared, 0103 physical sciences, medicine, Spectrophotometry, Ultraviolet, HITRAN, Physical and Theoretical Chemistry, Laboratories, Absorption (electromagnetic radiation), Atmospheric ozone, Ultraviolet, 0105 earth and related environmental sciences
Abstract

Knowing the ozone absorption cross sections in the ultraviolet and infrared spectral range, with an accuracy of better than 1%, is of the utmost importance for atmospheric remote-sensing applications. For this reason, various ozone intensity intercomparisons and measurements have been published these last years. However, the corresponding results proved not to be consistent and thus have raised a controversial discussion in the community of atmospheric remote-sensing. This study, where great care has been taken to avoid any possible error, reports a new laboratory intercomparison of the ozone absorption coefficients in the mid-infrared (10 μm) and ultraviolet (300-350 nm) spectral regions. It gives a new piece of information to the puzzling problem concerning the ozone IR and UV cross sections and confirms that the IR and UV cross sections recommended in the literature are in disagreement of about 4%.

Published
2010
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7. Absorption cross-sections of ozone in the ultraviolet and visible spectral regions: Status report 2015

Author

Viktor Gorshelev, Stanley P. Sander, Dimitris Balis, Michael C. Pitts, Georg Wagner, Michel Van Roozendael, Anna Serdyuchenko, Thierry Leblanc, Michael Petersen, Christophe Lerot, Philippe Moussay, Jean-Marie Flaud, Mark Weber, Bénédicte Picquet-Varrault, Alberto Redondas, Christof Janssen, Doug Degenstein, Alkiviadis F. Bais, Marie-Renée De Backer, Pepijn Veefkind, Aline Gratien, Edward Hare, Robert Wielgosz, Erkki Kyrölä, Alain Barbe, Pawan K. Bhartia, Gordon Labow, Tom McElroy, Claus Zehner, David Flittner, Geir O. Braathen, Xiong Liu, Matthias Schneider, Irina Petropavlovskikh, R. Evans, Sophie Godin-Beekmann, Johannes Staehelin, Joële Viallon, Maud Rotger-Languereau, Kelly Chance, Johannes Orphal, Maud Pastel, Camille Viatte, Anthony Cox, Johanna Tamminen, Richard D. McPeters, Manfred Birk, Thomas von Clarmann, James W. Burkholder, Institute for Meteorology and Climate Research (IMK), Karlsruhe Institute of Technology (KIT), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Finnish Meteorological Institute (FMI), World Meteorological Organization (WMO), Groupe de spectrométrie moléculaire et atmosphérique (GSMA), Université de Reims Champagne-Ardenne (URCA)-Centre National de la Recherche Scientifique (CNRS), Laboratory of Atmospheric Physics [Thessaloniki], Aristotle University of Thessaloniki, NASA Goddard Space Flight Center (GSFC), German Aerospace Center (DLR), Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado [Boulder]-National Oceanic and Atmospheric Administration (NOAA), Harvard-Smithsonian Center for Astrophysics (CfA), Harvard University [Cambridge]-Smithsonian Institution, University of Cambridge [UK] (CAM), Institute of Space and Atmospheric Studies [Saskatoon] (ISAS), Department of Physics and Engineering Physics [Saskatoon], University of Saskatchewan [Saskatoon] (U of S)-University of Saskatchewan [Saskatoon] (U of S), 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), NASA Langley Research Center [Hampton] (LaRC), STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), University of Bremen, Environment and Climate Change Canada, Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Bureau International des Poids et Mesures (BIPM), Jet Propulsion Laboratory (JPL), California Institute of Technology (CALTECH)-NASA, Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Agencia Estatal de Meteorología (AEMet), Royal Netherlands Meteorological Institute (KNMI), California Institute of Technology (CALTECH), Institute of Environmental Physics [Bremen] (IUP), European Space Research Institute (ESRIN), European Space Agency (ESA), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology in Zürich [Zürich] (ETH Zürich), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Environment Canada (Toronto), École normale supérieure - Paris (ENS Paris)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université de Cergy Pontoise (UCP), NASA-California Institute of Technology (CALTECH), Spanish State Meteorological Agency (AEMET), Jacquinet, Nicole, Flaud, Jean-Marie, Gamache, Robert R., Predoi-Cross, Adriana, Vander Auwera, Jean, Harvard University-Smithsonian Institution, École normale supérieure - Paris (ENS-PSL), and Agence Spatiale Européenne = European Space Agency (ESA)

Subjects
Ozone, 010504 meteorology & atmospheric sciences, 010501 environmental sciences, Atmospheric sciences, medicine.disease_cause, 01 natural sciences, Absorption, Atmosphere, chemistry.chemical_compound, Reference data, medicine, Physical and Theoretical Chemistry, Experimentelle Verfahren, Absorption (electromagnetic radiation), Spectroscopy, 0105 earth and related environmental sciences, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Remote sensing, Status report, Atomic and Molecular Physics, and Optics, Lidar, Cross sections, chemistry, 13. Climate action, Atmospheric chemistry, Environmental science, Ultraviolet, Atmospheric ozone
Abstract

The activity “Absorption Cross-Sections of Ozone” (ACSO) started in 2008 as a joint initiative of the International Ozone Commission (IO3C), the World Meteorological Organization (WMO) and the IGACO (“Integrated Global Atmospheric Chemistry Observations”) O3/UV subgroup to study, evaluate, and recommend the most suitable ozone absorption cross-section laboratory data to be used in atmospheric ozone measurements. The evaluation was basically restricted to ozone absorption cross-sections in the UV range with particular focus on the Huggins band. Up until now, the data of Bass and Paur published in 1985 (BP, 1985) are still officially recommended for such measurements. During the last decade it became obvious that BP (1985) cross-section data have deficits for use in advanced space-borne ozone measurements. At the same time, it was recognized that the origin of systematic differences in ground-based measurements of ozone required further investigation, in particular whether the BP (1985) cross-section data might contribute to these differences. In ACSO, different sets of laboratory ozone absorption cross-section data (including their dependence on temperature) of the group of Reims (France) (Brion et al., 1993, 1998, 1992, 1995, abbreviated as BDM, 1995) and those of Serdyuchenko et al. (2014), and Gorshelev et al. (2014), (abbreviated as SER, 2014) were examined for use in atmospheric ozone measurements in the Huggins band. In conclusion, ACSO recommends: (a) The spectroscopic data of BP (1985) should no longer be used for retrieval of atmospheric ozone measurements. (b) For retrieval of ground-based instruments of total ozone and ozone profile measurements by the Umkehr method performed by Brewer and Dobson instruments data of SER (2014) are recommended to be used. When SER (2014) is used, the difference between total ozone measurements of Brewer and Dobson instruments are very small and the difference between Dobson measurements at AD and CD wavelength pairs are diminished. (c) For ground-based Light Detection and Ranging (LIDAR) measurements the use of BDM (1995) or SER (2014) is recommended. (d) For satellite retrieval the presently widely used data of BDM (1995) should be used because SER (2014) seems less suitable for retrievals that use wavelengths close to 300 nm due to a deficiency in the signal-to-noise ratio in the SER (2014) dataset. The work of ACSO also showed: • The need to continue laboratory cross-section measurements of ozone of highest quality. The importance of careful characterization of the uncertainties of the laboratory measurements. • The need to extend the scope of such studies to other wavelength ranges (particularly to cover not only the Huggins band but also the comparison with the mid-infrared region). • The need for regular cooperation of experts in spectral laboratory measurements and specialists in atmospheric (ozone) measurements.

Published
2016
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8. The Climate relevant processing of mineral dust by volatile organic compounds : (CLIMDO) project

Author

Antonia Zogka, Frederic Thevenet, Mathieu Cazaunau, Jean-François Doussin, Michael R. Giordano, Paola Formenti, Ramiro Checa-Garcia, Aline Gratien, Claudia Di Biagio, Yves Balkanski, Francesco Battaglia, Emmanouil Romanias, Servanne Chevaillier, Vincent Michoud, Antonin Bergé, Didier Hauglustaine, Edouard Pangui, Vincent Gaudion, Cécile Mirande-Bret, Anne Cozic, Centre for Energy and Environment (CERI EE), Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Lille Douai), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), and Institut Mines-Télécom [Paris] (IMT)

Subjects
13. Climate action, Environmental chemistry, [SDE]Environmental Sciences, Environmental science, Mineral dust, 7. Clean energy, ComputingMilieux_MISCELLANEOUS
Abstract

As emphasized by the Intergovernmental Panel for Climate Change (IPCC), aerosols contribute the largest uncertainty to global radiative forcing budget estimates. The uncertainty stems largely from the lack of information related to global aerosol distributions, composition, and aging effects in the atmosphere, all of which affect aerosol radiative properties.Of the two major categories of aerosols, natural and anthropogenic, natural aerosols remain the largest source of the uncertainty. This limits our capacity to measure and attribute total climate forcings. Without a firm understanding of total climate forcing, our ability to predict its evolution over time diminishes and limits the development of adaptation strategies for future climate change.Aerosolized mineral dust is the largest single component of the global aerosol mass budget, making up nearly half of annual particle emissions to the atmosphere. Mineral dust aerosols influence the global climate through both direct interactions with radiation (scattering and absorption in the visible and IR regions) as well as indirect interactions with radiation (by serving as cloud condensation nuclei (CCN) or ice nuclei (IN)). One potentially important aspect of dust aerosols is that they are able to uptake and heterogeneously react with gases. Henceforth, mineral dust may also play a significant but mostly unknown role in secondary organic aerosol (SOA) formation in the atmosphere.While the combination of the complex reaction pathways and processing mechanisms inherent to the dust/organic system is hampering our understanding of dust and organic aerosols on global climate, and despite a great number of progresses on climate-relevant properties of mineral dust and SOA in these past ten years, studies of the heterogeneous chemistry occurring between dust and organic species are sparse.The CLImate relevant processing of Mineral Dust by volatile Organic compounds (CLIMDO) project tackles this under-explored science question by proposing the first comprehensive process-driven project addressing the reactivity of complex and realistic mineral dust/organic systems to better understand how dust and VOCs influence the global climate system.CLIMDO will investigate the heterogeneous interaction of mineral dust with two of the most common organic SOA precursors: glyoxal and methylglyoxal from ubiquitous anthropogenic and biogenic sources, thought combination of innovative laboratory experiments in a well-controlled and characterized environment (the atmospheric simulation chamber CESAM) and advanced flow reactors and optical cells), the development of novel modelling schemes of both the reaction mechanisms and the resulting optical properties of mineral dust, and new simulations of the global direct radiative effect and SOA distribution using the LMDzOR-INCA.This presentation describes the strategy and workplan of the CLIMDO project, including dissemination of results and open data, to inform the science community and foster and cluster new collaborations.

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