Ocean acidification and marine trace gas emissions

Hopkins, Frances E., Turner, Suzanne M., Nightingale, Philip D., Steinke, Michael, Bakker, Dorothee ORCID: https://orcid.org/0000-0001-9234-5337 and Liss, Peter S. (2010) Ocean acidification and marine trace gas emissions. Proceedings of the National Academy of Sciences of the United States of America, 107 (2). pp. 760-765. ISSN 1091-6490

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The oceanic uptake of man-made CO2 emissions is resulting in a measureable decrease in the pH of the surface oceans, a process which is predicted to have severe consequences formarine biological and biogeochemical processes [Caldeira K, Wickett ME (2003) Nature 425:365; The Royal Society (2005) Policy Document 12/05 (Royal Society, London)]. Here, we describe results showing how a doubling of current atmospheric CO2 affects the production of a suite of atmospherically important marine trace gases. Two CO2 treatments were used during a mesocosm CO2 perturbation experiment in a Norwegian fjord (present day: ~380 ppmv and year 2100: ~750 ppmv), and phytoplankton bloomswere stimulated by the addition of nutrients. Seawater trace gas concentrations were monitored over the growth and decline of the blooms, revealing that concentrations of methyl iodide and dimethylsulfide were significantly reduced under high CO2. Additionally, large reductions in concentrations of other iodocarbons were observed. The response of bromocarbons to high CO2 was less clear cut. Further research is now required to understand how ocean acidification might impact on global marine trace gas fluxes and how these impacts might feed through to changes in the earth's future climate and atmospheric chemistry.

Item Type: Article
Uncontrolled Keywords: sdg 13 - climate action,sdg 14 - life below water ,/dk/atira/pure/sustainabledevelopmentgoals/climate_action
Faculty \ School: Faculty of Science > School of Environmental Sciences
University of East Anglia Research Groups/Centres > Theme - ClimateUEA
UEA Research Groups: Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences
Faculty of Science > Research Groups > Marine and Atmospheric Sciences (former - to 2017)
Faculty of Science > Research Groups > Climate, Ocean and Atmospheric Sciences (former - to 2017)
Faculty of Science > Research Groups > Climatic Research Unit
Depositing User: Rosie Cullington
Date Deposited: 03 Feb 2011 15:45
Last Modified: 15 Jun 2023 23:46
URI: https://ueaeprints.uea.ac.uk/id/eprint/20312
DOI: 10.1073/pnas.0907163107

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