0000000000211294

AUTHOR

Lucy J. Carpenter

showing 3 related works from this author

In situ measurements of molecular iodine in the marine boundary layer: the link to macroalgae and the implications for O<sub>3</…

2010

Abstract. Discrete in situ atmospheric measurements of molecular iodine (I2) were carried out at Mace Head and Mweenish Bay on the west coast of Ireland using diffusion denuders in combination with a gas chromatography-mass spectrometry (GC-MS) method. I2, IO and OIO were also measured by long-path differential optical absorption spectroscopy (LP-DOAS). The simultaneous denuder and LP-DOAS I2 measurements were well correlated (R2=0.80) but the denuder method recorded much higher concentrations. This can be attributed to the fact that the in situ measurements were made near to macroalgal sources of I2 in the intertidal zone, whereas the LP-DOAS technique provides distance-averaged mixing rat…

In situAtmospheric ScienceDaytimebiologyChemistryDifferential optical absorption spectroscopyPhotodissociationAnalytical chemistryIntertidal zonebiology.organism_classificationAlgaeEnvironmental chemistryDiffusion (business)BayAtmospheric Chemistry and Physics
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Global sea-to-air flux climatology for bromoform, dibromomethane and methyl iodide

2013

Volatile halogenated organic compounds containing bromine and iodine, which are naturally produced in the ocean, are involved in ozone depletion in both the troposphere and stratosphere. Three prominent compounds transporting large amounts of marine halogens into the atmosphere are bromoform (CHBr3), dibromomethane (CH2Br2) and methyl iodide (CH3I). The input of marine halogens to the stratosphere has been estimated from observations and modelling studies using low-resolution oceanic emission scenarios derived from top-down approaches. In order to improve emission inventory estimates, we calculate data-based high resolution global sea-to-air flux estimates of these compounds from surface ob…

[SDE] Environmental SciencesAtmospheric Science010504 meteorology & atmospheric sciences[SDV]Life Sciences [q-bio]Tropical Tropopause LayerWind-Speed010501 environmental sciencesAtmospheric sciences01 natural sciencesDibromomethaneTroposphereAtmospherelcsh:ChemistryStratospheric Brominechemistry.chemical_compoundFlux (metallurgy)Ocean gyrePhysical Sciences and MathematicsGas-ExchangeOzone Depletion14. Life underwaterEmission inventoryStratosphere0105 earth and related environmental sciencesgeographygeography.geographical_feature_categoryAtlantic-OceanLife SciencesOzone depletionlcsh:QC1-999Halogenated Organic-Compounds[SDV] Life Sciences [q-bio]chemistrylcsh:QD1-99913. Climate actionMarine Boundary-LayerClimatologyPhytoplankton Cultures[SDE]Environmental SciencesPhotochemical Productionlcsh:Physics
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Emission of iodine-containing volatiles by selected microalgae species

2014

In this study we present the results of an emission study of different phytoplankton samples in aqueous media treated with elevated ozone levels. Halocarbon measurements show that the samples tested released bromoform and different iodocarbons, including iodomethane, iodochloromethane and diiodomethane. Iodide and iodate levels in the liquid phase were representative of concentrations of surface water in a natural environment. Measurement of volatile iodine (I2) emissions from two diatom samples (Mediopyxis helysia and Porosira glacialis) and the background sample (F/2 medium from filtered natural seawater) showed that the quantity of evolved I2 depends on the ozone concentration in the air…

Atmospheric ScienceOzoneInorganic chemistryIodidechemistry.chemical_elementcoastalIodinegas chromatography/mass spectrometrylcsh:Chemistrychemistry.chemical_compounddiatom culturesmolecular-iodineDiiodomethanenorth-seaIodateatlantic-oceanchemistry.chemical_classificationparticle formationfungiHalocarbonlcsh:QC1-999marine boundary-layerlcsh:QD1-999chemistrygerman bightEnvironmental chemistryphytoplanktonSeawaterBromoformlcsh:Physics
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