Investigation of coastal sea-fog formation using the WIBS (wideband integrated bioaerosol sensor) technique

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dc.contributor.author Daly, Shane M.
dc.contributor.author O'Connor, David J.
dc.contributor.author Healy, David A.
dc.contributor.author Hellebust, Stig
dc.contributor.author Arndt, Jovanna
dc.contributor.author McGillicuddy, Eoin J.
dc.contributor.author Feeney, Patrick
dc.contributor.author Quirke, Michael
dc.contributor.author Wenger, John C.
dc.contributor.author Sodeau, John R.
dc.date.accessioned 2019-11-19T12:14:07Z
dc.date.available 2019-11-19T12:14:07Z
dc.date.issued 2019-04-30
dc.identifier.citation Daly, S.M., O'Connor, D.J., Healy, D.A., Hellebust, S., Arndt, J., McGillicuddy, E.J., Feeney, P., Quirke, M., Wenger, J.C. and Sodeau, J.R., 2019. Investigation of coastal sea-fog formation using the WIBS (wideband integrated bioaerosol sensor) technique. Atmospheric Chemistry and Physics, 19(8), (14pp). DOI:10.5194/acp-19-5737-2019 en
dc.identifier.volume 19 en
dc.identifier.issued 8 en
dc.identifier.startpage 5737 en
dc.identifier.endpage 5751 en
dc.identifier.issn 1680-7316
dc.identifier.uri http://hdl.handle.net/10468/9094
dc.identifier.doi 10.5194/acp-19-5737-2019 en
dc.description.abstract A wideband integrated bioaerosol sensor (WIBS-4) was deployed in Haulbowline Island, Cork Harbour, to detect fluorescence particles in real time during July and September 2011. A scanning mobility particle sizer (SMPS) was also installed providing sizing analysis of the particles over the 10–450 nm range. During the campaign, multiple fog formation events occurred; they coincided with dramatic increases in the recorded fluorescent particle counts. The WIBS sizing and fluorescence intensity profiles indicated that the origin of the signals was potentially non-biological in nature (i.e. PBAPs, primary biological aerosol particles). Furthermore, the data did not support the presence of known fluorescing chemical particles like SOA (secondary organic aerosol). Complementary laboratory studies showed that the field results could potentially be explained by the adsorption of molecular iodine onto water droplets to form I2 ⋅ (H2O)x complexes. The release of iodine into the coastal atmosphere from exposed kelp at low tides has been known for many years. This process leads to the production of small IxOy particles, which can act as cloud condensation nuclei (CCN). While the process of molecular iodine release from coastal kelp sources, subsequent particle formation, and the observations of sea mists and fogs have been studied in detail, this study provides a potential link between the three phenomena. Of mechanistic interest is the fact that molecular iodine included into (rather than on) water droplets does not appear to fluoresce as measured using WIBS instrumentation. The study indicates a previously unsuspected stabilizing transport mechanism for iodine in the marine environment. Hence the stabilization of the molecular form would allow its more extensive distribution throughout the troposphere before eventual photolysis. en
dc.description.sponsorship Climate Change Research Programme 2007–2013 en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Copernicus Publications; European Geosciences Union (EGU) en
dc.relation.uri https://www.atmos-chem-phys.net/19/5737/2019/
dc.rights © Author(s) 2019. Published by Copernicus Publications on behalf of the European Geosciences Union. en
dc.rights.uri https://creativecommons.org/licenses/by/4.0/ en
dc.subject Coastal sea-fog en
dc.subject Wideband integrated bioaerosol sensor (WIBS-4) en
dc.subject Cork Harbour en
dc.title Investigation of coastal sea-fog formation using the WIBS (wideband integrated bioaerosol sensor) technique en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Stig Hellebust, School of Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: s.hellebust@ucc.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.contributor.funder Environmental Protection Agency en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Atmospheric Chemistry and Physics en
dc.internal.IRISemailaddress s.hellebust@ucc.ie en
dc.identifier.eissn 1680-7324


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© Author(s) 2019. Published by Copernicus Publications on behalf of the European Geosciences Union. Except where otherwise noted, this item's license is described as © Author(s) 2019. Published by Copernicus Publications on behalf of the European Geosciences Union.
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