Global modelling of tropospheric iodine aerosol

Sherwen, Tomás M., Evans, Mat J., Spracklen, Dominick V., Carpenter, Lucy J., Chance, Rosie, Baker, Alex R. ORCID:, Schmidt, Johan A. and Breider, Thomas J. (2016) Global modelling of tropospheric iodine aerosol. Geophysical Research Letters, 43 (18). 10012–10019. ISSN 0094-8276

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Natural aerosols play a central role in the Earth system. The conversion of dimethyl sulfide to sulfuric acid is the dominant source of oceanic secondary aerosol. Ocean emitted iodine can also produce aerosol. Using a GEOS-Chem model we present a simulation of iodine aerosol. The simulation compares well with the limited observational dataset. Iodine aerosol concentrations are highest in the tropical marine-boundary layer (MBL) averaging 5.2 ng (I) m-3 with monthly maximum concentrations of 90 ng (I) m-3. These masses are small compared to sulfate (0.75% of MBL burden, up to 11% regionally) but are more significant compared to DMS sourced sulfate (3% of the MBL burden, up to 101% regionally). In the pre-industrial, iodine aerosol makes up 0.88 % of the MBL burden sulfate mass and regionally up to 21%. Iodine aerosol may be an important regional mechanism for ocean-atmosphere interaction.

Item Type: Article
Additional Information: ©2016. The Authors. This is an open access article under theterms of the Creative CommonsAttribution License, which permits use,distribution and reproduc tion in anymedium, provided the original work isproperly cited.
Uncontrolled Keywords: iodine,aerosol,dimethyl sulfide,marine boundary layer,dms,sulfate
Faculty \ School: Faculty of Science > School of Environmental Sciences
Faculty of Science > School of Natural Sciences
UEA Research Groups: Faculty of Science > Research Groups > Climate, Ocean and Atmospheric Sciences (former - to 2017)
Faculty of Science > Research Groups > Marine and Atmospheric Sciences (former - to 2017)
Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences
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Depositing User: Pure Connector
Date Deposited: 24 Sep 2016 00:42
Last Modified: 21 Oct 2022 14:34
DOI: 10.1002/2016GL070062


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