Preprints
https://doi.org/10.5194/egusphere-2022-60
https://doi.org/10.5194/egusphere-2022-60
 
25 Apr 2022
25 Apr 2022

Improving continuous-flow analysis of triple oxygen isotopes in ice cores: insights from replicate measurements

Lindsey Davidge, Eric J. Steig, and Andrew J. Schauer Lindsey Davidge et al.
  • Department of Earth and Space Science, University of Washington, Seattle, 98195, USA

Abstract. Stable water isotope measurements from polar ice cores provide high-resolution information about past hydrologic conditions and are therefore important to understanding Earth's climate system. Routine high-resolution measurements of δ18O, δD, and deuterium excess are made by continuous-flow analysis (CFA) methods that include laser spectroscopy instruments. Recent advances in instrumentation allow for simultaneous measurements of all stable water isotopes, including δ17O and 17O excess (Δ17O). Here, we present replicate measurements of an ice core sample taken from Summit, Greenland, using a CFA system coupled to a cavity ring-down laser spectroscopy (CRDS) instrument. We demonstrate that our CFA-CRDS method can make high-precision measurements of Δ17O (< 5 per meg) with high resolution (a few cm) in ice core samples. We find that calibration errors generate most of the variability among the replicate datasets. Our work shows that CFA-CRDS methods can detect seasonal variability in Δ17O. We suggest that CFA-CRDS methods should be applied to ice core measurements when high-resolution information is desired.

Journal article(s) based on this preprint

22 Dec 2022
Improving continuous-flow analysis of triple oxygen isotopes in ice cores: insights from replicate measurements
Lindsey Davidge, Eric J. Steig, and Andrew J. Schauer
Atmos. Meas. Tech., 15, 7337–7351, https://doi.org/10.5194/amt-15-7337-2022,https://doi.org/10.5194/amt-15-7337-2022, 2022
Short summary

Lindsey Davidge et al.

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-60', Anonymous Referee #1, 15 May 2022
    • AC1: 'Reply on RC1', Lindsey Davidge, 15 Jul 2022
  • RC2: 'Comment on egusphere-2022-60', Anonymous Referee #2, 17 May 2022
    • AC2: 'Reply on RC2', Lindsey Davidge, 15 Jul 2022

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-60', Anonymous Referee #1, 15 May 2022
    • AC1: 'Reply on RC1', Lindsey Davidge, 15 Jul 2022
  • RC2: 'Comment on egusphere-2022-60', Anonymous Referee #2, 17 May 2022
    • AC2: 'Reply on RC2', Lindsey Davidge, 15 Jul 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Lindsey Davidge on behalf of the Authors (15 Jul 2022)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (11 Aug 2022) by Christof Janssen
RR by Anonymous Referee #2 (24 Aug 2022)
RR by Anonymous Referee #1 (07 Sep 2022)
ED: Publish subject to minor revisions (review by editor) (15 Sep 2022) by Christof Janssen
AR by Lindsey Davidge on behalf of the Authors (29 Sep 2022)  Author's response    Author's tracked changes    Manuscript
ED: Publish subject to minor revisions (review by editor) (25 Oct 2022) by Christof Janssen
AR by Lindsey Davidge on behalf of the Authors (02 Nov 2022)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (09 Nov 2022) by Christof Janssen

Journal article(s) based on this preprint

22 Dec 2022
Improving continuous-flow analysis of triple oxygen isotopes in ice cores: insights from replicate measurements
Lindsey Davidge, Eric J. Steig, and Andrew J. Schauer
Atmos. Meas. Tech., 15, 7337–7351, https://doi.org/10.5194/amt-15-7337-2022,https://doi.org/10.5194/amt-15-7337-2022, 2022
Short summary

Lindsey Davidge et al.

Lindsey Davidge et al.

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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
We describe a continuous flow method to measure Δ17O by laser spectroscopy, and we show that cm-scale information can be measured reliably in ice cores by this method. We present seasonally resolved measurements of Δ17O from Greenland, and we demonstrate that – though small – most of our remaining error is from calibration. Our results reinforce the use of this method for high-precision, high-resolution measurements of Δ17O; they also identify calibration as a limiting step for this method.