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Marine aerosol formation from biogenic iodine emissions

O'Dowd, Colin D. and Jimenez, Jose L. and Bahreini, Roya and Flagan, Richard C. and Seinfeld, John H. and Hämeri, Kaarle and Pirjola, Liisa and Kulmala, Markku and Jennings, S. Gerard and Hoffmann, Thorsten (2002) Marine aerosol formation from biogenic iodine emissions. Nature, 417 (6889). pp. 632-636. ISSN 0028-0836. doi:10.1038/nature00775.

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The formation of marine aerosols and cloud condensation nuclei—from which marine clouds originate—depends ultimately on the availability of new, nanometre-scale particles in the marine boundary layer. Because marine aerosols and clouds scatter incoming radiation and contribute a cooling effect to the Earth's radiation budget, new particle production is important in climate regulation. It has been suggested that sulphuric acid—derived from the oxidation of dimethyl sulphide—is responsible for the production of marine aerosols and cloud condensation nuclei. It was accordingly proposed that algae producing dimethyl sulphide play a role in climate regulation, but this has been difficult to prove and, consequently, the processes controlling marine particle formation remains largely undetermined. Here, using smog chamber experiments under coastal atmospheric conditions, we demonstrate that new particles can form from condensable iodine-containing vapours, which are the photolysis products of biogenic iodocarbons emitted from marine algae. Moreover, we illustrate, using aerosol formation models, that concentrations of condensable iodine-containing vapours over the open ocean are sufficient to influence marine particle formation. We suggest therefore that marine iodocarbon emissions have a potentially significant effect on global radiative forcing.

Item Type:Article
Related URLs:
URLURL TypeDescription ReadCube access
Jimenez, Jose L.0000-0001-6203-1847
Flagan, Richard C.0000-0001-5690-770X
Seinfeld, John H.0000-0003-1344-4068
Additional Information:© 2002 Nature Publishing Group. Received 21 December 2001; Accepted 16 April 2002. This work was funded by the European Commission, the Finnish Academy, the US Department of Energy and the National Development Plan and Environmental Protection Agency, Ireland.
Funding AgencyGrant Number
European CommissionUNSPECIFIED
Finnish AcademyUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
National Development Plan and Environmental Protection Agency (Ireland)UNSPECIFIED
Issue or Number:6889
Record Number:CaltechAUTHORS:20150325-103852382
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Official Citation:Marine aerosol formation from biogenic iodine emissions p632 Colin D. O'Dowd, Jose L. Jimenez, Roya Bahreini, Richard C. Flagan, John H. Seinfeld, Kaarle Hämeri, Liisa Pirjola, Markku Kulmala, S. Gerard Jennings and Thorsten Hoffmann doi:10.1038/nature00775
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:56070
Deposited By: Ruth Sustaita
Deposited On:25 Mar 2015 19:18
Last Modified:10 Nov 2021 20:54

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