Articles | Volume 16, issue 22
https://doi.org/10.5194/bg-16-4451-2019
https://doi.org/10.5194/bg-16-4451-2019
Research article
 | 
25 Nov 2019
Research article |  | 25 Nov 2019

Validation of carbon isotope fractionation in algal lipids as a pCO2 proxy using a natural CO2 seep (Shikine Island, Japan)

Caitlyn R. Witkowski, Sylvain Agostini, Ben P. Harvey, Marcel T. J. van der Meer, Jaap S. Sinninghe Damsté, and Stefan Schouten

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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by editor) (17 Sep 2019) by Clare Woulds
AR by S. Schouten on behalf of the Authors (25 Sep 2019)  Author's response   Manuscript 
ED: Publish as is (15 Oct 2019) by Clare Woulds
AR by S. Schouten on behalf of the Authors (16 Oct 2019)  Author's response   Manuscript 
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Short summary
Carbon dioxide concentrations (pCO2) in the atmosphere play an integral role in Earth system dynamics, especially climate. Past climates help us understand future ones, but reconstructing pCO2 over the geologic record remains a challenge. This research demonstrates new approaches for exploring past pCO2 via the carbon isotope fractionation in general algal lipids, which we test over a high CO2 gradient from a naturally occurring CO2 seep.
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