Isotopic and chromatographic fingerprinting of the sources of dissolved organic carbon in a shallow coastal aquifer

Meredith, Karina T.; Baker, Andy; Andersen, Martin S.; O'Carroll, Denis M.; Rutlidge, Helen; McDonough, Liza K.; Oudone, Phetdala; Bryan, Eliza; Zainuddin, Nur Syahiza

doi:https://doi.org/10.5194/hess-24-2167-2020

Articles | Volume 24, issue 4

https://doi.org/10.5194/hess-24-2167-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/hess-24-2167-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 4

Research article

|

30 Apr 2020

Research article |

| 30 Apr 2020

Isotopic and chromatographic fingerprinting of the sources of dissolved organic carbon in a shallow coastal aquifer

Karina T. Meredith, Andy Baker, Martin S. Andersen, Denis M. O'Carroll, Helen Rutlidge, Liza K. McDonough, Phetdala Oudone, Eliza Bryan, and Nur Syahiza Zainuddin

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Final revised paper (published on 30 Apr 2020)
Preprint (discussion started on 12 Feb 2019)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'Minor comments to the manuscript', Hannelore Waska, 16 Oct 2019
- AC1: 'AC response to RC1', Karina Meredith, 30 Dec 2019
RC2: 'hess-2018-627-RC2', Anonymous Referee #2, 20 Dec 2019
- AC2: 'AC response to RC2', Karina Meredith, 30 Dec 2019

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

ED: Publish subject to revisions (further review by editor and referees) (24 Jan 2020) by Nandita Basu

AR by Karina Meredith on behalf of the Authors (20 Feb 2020) Author's response Manuscript

ED: Publish as is (25 Mar 2020) by Nandita Basu

AR by Karina Meredith on behalf of the Authors (01 Apr 2020) Author's response Manuscript

Short summary

Dissolved organic carbon within groundwater and processes controlling it remain largely unknown. The average groundwater concentration at this coastal site was 5 times higher than the global median, doubling with depth, but with no change in chromatographic character. The lack of oxygen limited the rate of organic matter processing, leading to enhanced preservation. Changes in coastal hydrology could lead to the flux of unreacted organic carbon.