MEPS 470:191-205 (2012)  -  DOI: https://doi.org/10.3354/meps10082

Influence of ocean warming and acidification on trace metal biogeochemistry

Linn J. Hoffmann1,2,*, Eike Breitbarth1,2, Philip W. Boyd3, Keith A. Hunter

1Department of Chemistry, University of Otago, PO Box 56, Dunedin 9054, New Zealand
2GEOMAR Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, 24105 Kiel, Germany
3National Institute of Water and Atmosphere Centre of Chemical and Physical Oceanography, Department of Chemistry, University of Otago, PO Box 56, Dunedin 9054, New Zealand

ABSTRACT: Rising atmospheric CO2 concentrations will have profound effects on atmospheric and hydrographic processes, which will ultimately modify the supple and chemistry of trace metals in the ocean. In addition to an increase in sea surface temperatures, higher CO2 results in a decrease in seawater pH, known as ocean acidification, with implications for inorganic trace metal chemistry. Furthermore, direct or indirect effects of ocean acidification and ocean warming on marine biota will affect trace metal biogeochemistry via alteration of biological trace metal uptake rates and metal binding to organic ligands. We still lack a holistic understanding of the impacts of decreasing seawater pH and rising temperatures on different trace metals and marine biota, which complicates projections into the future. Here, we outline how ocean acidification and ocean warming will influence the inputs and cycling of Fe and other biologically relevant trace metals globally and regionally in high and low latitudes of the future ocean; we discuss uncertainties and highlight essential future research fields.


KEY WORDS: Ocean acidification · Ocean warming · Trace metals


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Cite this article as: Hoffmann LJ, Breitbarth E, Boyd PW, Hunter KA (2012) Influence of ocean warming and acidification on trace metal biogeochemistry. Mar Ecol Prog Ser 470:191-205. https://doi.org/10.3354/meps10082

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