5 results on '"INDIANA UNIVERSITY SCHOOL OF PUBLIC AND ENVIRONMENTAL AFFAIRS BLOOMINGTON USA"'
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2. Intercomparison of peroxy radical instruments at the HELIOS atmospheric simulation chamber
- Author
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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
3. Measurements of nitrous acid HONO) in an Indiana forest by Laser Photofragmentation-Laser-induced Flourescence LP-LIF)
- Author
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BOTTORFF, B., LEW, M., Stevens, P., Dusanter, S., Kundu, S., DEMING, B., Wood, E., Department of Chemistry, Indiana University, Indiana University [Bloomington], Indiana University System-Indiana University System, INDIANA UNIVERSITY SCHOOL OF PUBLIC AND ENVIRONMENTAL AFFAIRS BLOOMINGTON USA, Partenaires IRSTEA, 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), Center for Research in Environmental Science, School of Public and Environmental Affairs and Department of Chemistry, University of Massachusetts [Lowell] (UMass Lowell), University of Massachusetts System (UMASS), and University of Massachusetts [Amherst] (UMass Amherst)
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[INFO]Computer Science [cs] ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience; abstract simple
- Published
- 2015
4. Intercomparison of OH reactivity measured by the pump-probe technique and the comparative reactivity method
- Author
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Blocquet, M., Hansen, R., Dusanter, Sébastien, LEONAIS, T., Locoge, N., Hanoune, B., Fittschen, C., Stevens, P., Sinha, V., WA, M., Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 (PC2A), Université de Lille-Centre National de la Recherche Scientifique (CNRS), institute for pheromone research, Department of Chemistry, Indiana University [Bloomington], Indiana University System-Indiana University System, École des Mines de Douai (Mines Douai EMD), Institut Mines-Télécom [Paris] (IMT), INDIANA UNIVERSITY SCHOOL OF PUBLIC AND ENVIRONMENTAL AFFAIRS BLOOMINGTON USA, Partenaires IRSTEA, 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), and Indian Institute of Science Education and Research Mohali (IISER Mohali)
- Subjects
[INFO]Computer Science [cs] ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience; abstract simple
- Published
- 2014
5. The impact of the change in vegetation structure on the ecological functions of salt marshes: The example of the Yangtze estuary
- Author
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Linjing Ren, Shilun Yang, Ülo Mander, Christopher B. Craft, Xiuzhen Li, Yu Liu, STATE KEY LABORATORY OF ESTUARINE AND COASTAL RESEARCH EAST CHINA NORMAL UNIVERSITY SHANGHAI CHN, Partenaires IRSTEA, 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), INDIANA UNIVERSITY SCHOOL OF PUBLIC AND ENVIRONMENTAL AFFAIRS BLOOMINGTON USA, UNIVERSITY OF TARTU INSTITUTE OF ECOLOGY AND EARTH SCIENCES DEPARTMENT OF GEOGRAPHY EST, Génie des procédés frigorifiques (UR GPAN), and Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)
- Subjects
SALT MARSH VEGETATION ,SEDIMENT ACCUMULATION ,Carbon sequestration ,WAVE ATTENUATION ,Phragmites ,Seawall ,Land reclamation ,CARBON STORAGE ,14. Life underwater ,Hydrology ,Global and Planetary Change ,geography ,Spartina ,geography.geographical_feature_category ,biology ,Ecology ,YANGTZE ESTUAIRE ,Estuary ,15. Life on land ,biology.organism_classification ,6. Clean water ,13. Climate action ,Salt marsh ,[SDE]Environmental Sciences ,Environmental science ,Scirpus - Abstract
International audience; Salt marshes worldwide are faced with threats from rising sea levels and coastal development. We measured changes in salt marsh vegetation structure using remote sensing and its consequences for carbon sequestration, wave attenuation, and sediment trapping ability using remotely sensed imaging, field measurement data, and the published literature data pertaining to the Yangtze Estuary, a rapidly urbanizing area in Eastern China. From 1980 to 2010, the total area of vegetated salt marsh decreased by 17 %, but the vegetation structure changed more dramatically, with the ratio of Phragmites/Spartina/Scirpus changing from 24:0:76, to 77:0:23, 44:13:43, and 33:39:28 in 1980, 1990, 2000, and 2010, respectively. Carbon sequestration increased slightly from 1980 to 2010, with the dramatic shifts in plant species composition. The total length of seawall inadequately protected by salt marsh vegetation increased from 44 km in 1980 to 300 km in 2010. Sediment accretion increased (from 8 to 14 million m3/year) due to the spread of Spartina, which to some extent compensated the loss of total vegetated area in the salt marsh. Changes in the delivery of functions were not linearly related to the change in the area of vegetated salt marsh, but more from the combined effect of changing vegetation structure, sediment input, and land reclamation. Under threat of sea-level rise, protection and maintenance of vegetation structure outside the seawall are of great importance for the safe economic development inside the seawall.
- Published
- 2014
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