Articles | Volume 15, issue 23
https://doi.org/10.5194/bg-15-7205-2018
https://doi.org/10.5194/bg-15-7205-2018
Research article
 | 
04 Dec 2018
Research article |  | 04 Dec 2018

Southern Ocean controls of the vertical marine δ13C gradient – a modelling study

Anne L. Morée, Jörg Schwinger, and Christoph Heinze

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Short summary
Changes in the distribution of the carbon isotope 13C can be used to study the climate system if the governing processes (ocean circulation and biogeochemistry) are understood. We show the Southern Ocean importance for the global 13C distribution and that changes in 13C can be strongly influenced by biogeochemistry. Interpretation of 13C as a proxy for climate signals needs to take into account the effects of changes in biogeochemistry in addition to changes in ocean circulation.
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