Coastal iodine emissions: part 2. Chamber experiments of particle formation from Laminaria digitata-derived and laboratory-generated I2

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dc.contributor.author Monahan, Ciaran
dc.contributor.author Ashu-Ayem, Enowmbi R.
dc.contributor.author Nitschke, Udo
dc.contributor.author Darby, Steven B.
dc.contributor.author Smith, Paul D.
dc.contributor.author Stengel, Dagmar B.
dc.contributor.author Venables, Dean S.
dc.contributor.author O'Dowd, Colin D.
dc.date.accessioned 2012-11-20T13:00:19Z
dc.date.issued 2012
dc.identifier.citation MONAHAN, C., ASHU-AYEM, E. R., NITSCHKE, U., DARBY, S. B., SMITH, P. D., STENGEL, D. B., VENABLES, D. S. & O’DOWD, C. D. 2012. Coastal Iodine Emissions: Part 2. Chamber Experiments of Particle Formation from Laminaria digitata-Derived and Laboratory-Generated I2. Environmental Science & Technology, 46, 10422-10428. doi: 10.1021/es3011805 en
dc.identifier.volume 46 en
dc.identifier.startpage 10422 en
dc.identifier.endpage 10428 en
dc.identifier.issn 0013-936X
dc.identifier.uri http://hdl.handle.net/10468/788
dc.identifier.doi 10.1021/es3011805
dc.description.abstract Laboratory studies into particle formation from Laminaria digitata macroalgae were undertaken to elucidate aerosol formation for a range of I2 (0.3−76 ppbv) and O3(<3−96 ppbv) mixing ratios and light levels (EPAR = 15, 100,and 235 μmol photons m−2 s−1). No clear pattern was observed for I2 or aerosol parameters as a function of light levels. Aerosol mass fluxes and particle number concentrations,were, however, correlated with I2 mixing ratios for low O3mixing ratios of <3 ppbv (R2 = 0.7 and 0.83, respectively for low light levels, and R2 = 0.95 and 0.98, respectively for medium lightlevels). Additional experiments into particle production as a function of laboratory-generated I2, over a mixing ratio range of 1−8ppbv, were conducted under moderate O3 mixing ratios (∼24 ppbv) where a clear, 100-fold or greater, increase in the aeroso lnumber concentrations and mass fluxes was observed compared to the low O3 experiments. A linear relationship between particle concentration and I2 was found, in reasonable agreement with previous studies. Scaling the laboratory relationship to aerosol concentrations typical of the coastal boundary layer suggests a I2 mixing ratio range of 6−93 pptv can account for the observed particle production events. Aerosol number concentration produced from I2 is more than a factor of 10 higher than thatproduced from CH2I2 for the same mixing ratios. en
dc.description.sponsorship Science Foundation Ireland (07/RFP/GEOF716); Science Foundation Ireland (09/RFP/CAP2509); Irish Research Council for Science Engineering and Technology (EMBARK); European Commission (FP6 - EUCAARI) ; European Commission (FP5 -MAP); European Commission (FP6 - EUSAAR) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Chemical Society en
dc.relation.ispartof Marine Boundary Layer: Ocean Atmospheric Interactions
dc.rights Copyright © 2012 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental Science and Technology, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/es3011805 en
dc.subject Air Pollution and Industrial hygiene en
dc.subject Marine boundary layer en
dc.subject Iodine release en
dc.subject.lcsh Marine algae en
dc.title Coastal iodine emissions: part 2. Chamber experiments of particle formation from Laminaria digitata-derived and laboratory-generated I2 en
dc.type Article (peer-reviewed) en
dc.internal.authorurl http://research.ucc.ie/profiles/D004/dvenables en
dc.internal.authorcontactother Dean Venables, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: d.venables@ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2012-10-23T15:08:35Z
dc.description.version Accepted Version en
dc.internal.rssid 168078743
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder Irish Research Council for Science Engineering and Technology en
dc.contributor.funder European Commission en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Environmental Science and Technology en
dc.internal.copyrightchecked No. CORA - ROMEO and publishers website, journal publishing agreement. Permitted if mandated by funder. en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress d.venables@ucc.ie en


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