Coastal iodine emissions: part 2. Chamber experiments of particle formation from Laminaria digitata-derived and laboratory-generated I2
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.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.date.accessioned | 2012-11-20T13:00:19Z | |
dc.date.issued | 2012 | |
dc.date.updated | 2012-10-23T15:08:35Z | |
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.description.status | Peer reviewed | en |
dc.description.version | Accepted Version | en |
dc.format.mimetype | application/pdf | en |
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.doi | 10.1021/es3011805 | |
dc.identifier.endpage | 10428 | en |
dc.identifier.issn | 0013-936X | |
dc.identifier.journaltitle | Environmental Science and Technology | en |
dc.identifier.startpage | 10422 | en |
dc.identifier.uri | https://hdl.handle.net/10468/788 | |
dc.identifier.volume | 46 | 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 |