Articles | Volume 18, issue 12
Biogeosciences, 18, 3579–3603, 2021
https://doi.org/10.5194/bg-18-3579-2021
Biogeosciences, 18, 3579–3603, 2021
https://doi.org/10.5194/bg-18-3579-2021

Research article 17 Jun 2021

Research article | 17 Jun 2021

Revised fractional abundances and warm-season temperatures substantially improve brGDGT calibrations in lake sediments

Jonathan H. Raberg 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-2021-16', Anonymous Referee #1, 15 Feb 2021
    • AC1: 'Reply on RC1', Jonathan Raberg, 02 Apr 2021
  • RC2: 'Comment on bg-2021-16', Anonymous Referee #2, 15 Feb 2021
    • AC2: 'Reply on RC2', Jonathan Raberg, 02 Apr 2021
  • EC1: 'Comment on bg-2021-16', Sebastian Naeher, 28 Feb 2021
    • AC3: 'Reply on EC1', Jonathan Raberg, 02 Apr 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by editor) (17 Apr 2021) by Sebastian Naeher
AR by Jonathan Raberg on behalf of the Authors (29 Apr 2021)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (02 May 2021) by Sebastian Naeher
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Short summary
BrGDGT lipids are a proxy for temperature in lake sediments, but other parameters like pH can influence them, and seasonality can affect the temperatures they record. We find a warm-season bias at 43 new high-latitude sites. We also present a new method that deconvolves the effects of temperature, pH, and conductivity and generate global calibrations for these variables. Our study provides new paleoclimate tools, insight into brGDGTs at the biochemical level, and a new method for future study.
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