Articles | Volume 19, issue 13
Biogeosciences, 19, 3305–3315, 2022
https://doi.org/10.5194/bg-19-3305-2022
Biogeosciences, 19, 3305–3315, 2022
https://doi.org/10.5194/bg-19-3305-2022
Research article
15 Jul 2022
Research article | 15 Jul 2022

Physiological control on carbon isotope fractionation in marine phytoplankton

Karen M. Brandenburg et al.

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Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on bg-2022-68', Anonymous Referee #1, 06 Apr 2022
    • AC1: 'Reply on RC1', Karen Brandenburg, 21 Apr 2022
  • RC2: 'Comment on bg-2022-68', Anonymous Referee #2, 12 Apr 2022
    • AC2: 'Reply on RC2', Karen Brandenburg, 21 Apr 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by editor) (05 May 2022) by Tina Treude
AR by Karen Brandenburg on behalf of the Authors (06 May 2022)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (12 May 2022) by Tina Treude
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Short summary
Reconstructions of past CO2 concentrations rely on proxy estimates, with one line of proxies relying on the CO2-dependence of stable carbon isotope fractionation in marine phytoplankton. Culturing experiments provide insights into which processes may impact this. We found, however, that the methods with which these culturing experiments are performed also influence 13C fractionation. Caution should therefore be taken when extrapolating results from these experiments to proxy applications.
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