The seaweeds Fucus vesiculosus and Ascophyllum nodosum are significant contributors to coastal iodine emissions

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dc.contributor.author Huang, R. J.
dc.contributor.author Thorenz, U. R.
dc.contributor.author Kundel, M.
dc.contributor.author Venables, Dean S.
dc.contributor.author Ceburnis, D.
dc.contributor.author Ho, K. F.
dc.contributor.author Chen, Jun
dc.contributor.author Vogel, A. L.
dc.contributor.author Küpper, F. C.
dc.contributor.author Smyth, P. P. A.
dc.contributor.author Nitschke, Udo
dc.contributor.author Stengel, D. B.
dc.contributor.author Berresheim, H.
dc.contributor.author O'Dowd, Colin D.
dc.contributor.author Hoffmann, T.
dc.date.accessioned 2014-01-08T15:42:40Z
dc.date.available 2014-01-08T15:42:40Z
dc.date.copyright 2013
dc.date.issued 2013-05-27
dc.identifier.citation Huang, R.-J., Thorenz, U. R., Kundel, M., Venables, D. S., Ceburnis, D., Ho, K. F., Chen, J., Vogel, A. L., Küpper, F. C., Smyth, P. P. A., Nitschke, U., Stengel, D. B., Berresheim, H., O'Dowd, C. D., and Hoffmann, T.: The seaweeds Fucus vesiculosus and Ascophyllum nodosum are significant contributors to coastal iodine emissions, Atmos. Chem. Phys., 13, 5255-5264, doi:10.5194/acp-13-5255-2013, 2013. en
dc.identifier.volume 13 en
dc.identifier.startpage 5255 en
dc.identifier.endpage 5264 en
dc.identifier.issn 1680-7324
dc.identifier.uri http://hdl.handle.net/10468/1296
dc.identifier.doi 10.5194/acp-13-5255-2013
dc.description.abstract Based on the results of a pilot study in 2007, which found high mixing ratios of molecular iodine (I2) above the intertidal macroalgae (seaweed) beds at Mweenish Bay (Ireland), we extended the study to nine different locations in the vicinity of Mace Head Atmospheric Research Station on the west coast of Ireland during a field campaign in 2009. The mean values of \chem{I_2} mixing ratio found above the macroalgae beds at nine different locations ranged from 104 to 393 ppt, implying a high source strength of I2. Such mixing ratios are sufficient to result in photochemically driven coastal new-particle formation events. Mixing ratios above the Ascophyllum nodosum and Fucus vesiculosus beds increased with exposure time: after 6 h exposure to ambient air the mixing ratios were one order of magnitude higher than those initially present. This contrasts with the emission characteristics of Laminaria digitata, where most I2 was emitted within the first half hour of exposure. Discrete in situ measurements (offline) of I2 emission from ambient air-exposed chamber experiments of L. digitata, A. nodosum and F. vesiculosus substantially supported the field observations. Further online and time-resolved measurements of the I2 emission from O3-exposed macroalgal experiments in a chamber confirmed the distinct I2 emission characteristics of A. nodosum and F. vesiculosus compared to those of L. digitata. The emission rates of A. nodosum and F. vesiculosus were comparable to or even higher than L. digitata after the initial exposure period of ~20–30 min. We suggest that A. nodosum and F. vesiculosus may provide an important source of photolabile iodine in the coastal boundary layer and that their impact on photochemistry and coastal new-particle formation should be reevaluated in light of their longer exposure at low tide and their widespread distribution. en
dc.description.sponsorship German Research Foundation - Deutsche Forschungsgemeinschaft, Germany (graduate program 826 “Trace Analysis of Elemental Species: Development of Methods and Applications”); ScienceFoundation Ireland (09/RFP/CAP2509); European Commission (EU-ASSEMBLE framework.) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Copernicus Publications en
dc.relation.uri http://www.atmos-chem-phys.net/13/5255/2013/
dc.rights © Author(s) 2013. This work is distributed under the Creative Commons Attribution 3.0 License. en
dc.rights.uri http://creativecommons.org/licenses/by/3.0/ en
dc.subject Atmosphere en
dc.subject Seaweed en
dc.subject Macroalgae en
dc.subject.lcsh Iodine en
dc.subject.lcsh Fucus vesiculosus en
dc.subject.lcsh Ascophyllum nodosum en
dc.subject.lcsh Marine algae en
dc.title The seaweeds Fucus vesiculosus and Ascophyllum nodosum are significant contributors to coastal iodine emissions en
dc.type Article (peer-reviewed) 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 2013-08-15T11:54:41Z
dc.description.version Published Version en
dc.internal.rssid 225804358
dc.contributor.funder Irish Research Council for Science Engineering and Technology en
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder German Research Foundation de
dc.contributor.funder European Commission en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Atmospheric Chemistry and Physics en
dc.internal.copyrightchecked No Again, Copernicus...no problems expected. CORA - ROMEO Published version permitted. en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress d.venables@ucc.ie en


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© Author(s) 2013. This work is distributed under the Creative Commons Attribution 3.0 License. Except where otherwise noted, this item's license is described as © Author(s) 2013. This work is distributed under the Creative Commons Attribution 3.0 License.
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