Articles | Volume 16, issue 18
Atmos. Chem. Phys., 16, 12219–12237, 2016
https://doi.org/10.5194/acp-16-12219-2016

Special issue: Biogeochemical processes, tropospheric chemistry and interactions...

Atmos. Chem. Phys., 16, 12219–12237, 2016
https://doi.org/10.5194/acp-16-12219-2016

Research article 29 Sep 2016

Research article | 29 Sep 2016

Biogenic halocarbons from the Peruvian upwelling region as tropospheric halogen source

Helmke Hepach et al.

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Cited articles

Abrahamsson, K., Lorén, A., Wulff, A., and Wangberg, S. A.: Air-sea exchange of halocarbons: The influence of diurnal and regional variations and distribution of pigments, Deep-Sea Res. Pt. II, 51, 2789–2805, https://doi.org/10.1016/j.dsr2.2004.09.005, 2004.
Amachi, S.: Microbial contribution to global iodine cycling: Volatilization, accumulation, reduction, oxidation, and sorption of iodine, Microbes Environ., 23, 269–276, https://doi.org/10.1264/jsme2.ME08548, 2008.
Amachi, S., Kamagata, Y., Kanagawa, T., and Muramatsu, Y.: Bacteria mediate methylation of iodine in marine and terrestrial environments, Appl. Environ. Microb., 67, 2718–2722, https://doi.org/10.1128/aem.67.6.2718-2722.2001, 2001.
Archer, S. D., Goldson, L. E., Liddicoat, M. I., Cummings, D. G., and Nightingale, P. D.: Marked seasonality in the concentrations and sea-to-air flux of volatile iodocarbon compounds in the western English channel, J. Geophys. Res.-Oceans, 112, C08009, https://doi.org/10.1029/2006jc003963, 2007.
Bakun, A. and Weeks, S. J.: The marine ecosystem off Peru: What are the secrets of its fishery productivity and what might its future hold?, Prog. Oceanogr., 79, 290–299, https://doi.org/10.1016/j.pocean.2008.10.027, 2008.
Short summary
We present surface seawater measurements of bromo- and iodocarbons, which are involved in numerous atmospheric processes such as tropospheric and stratospheric ozone chemistry, from the highly productive Peruvian upwelling. By combining trace gas measurements, characterization of organic matter and phytoplankton species, and tropospheric modelling, we show that large amounts of iodocarbons produced from the pool of organic matter may contribute strongly to local tropospheric iodine loading.
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