Evidence of changes in sedimentation rate and sediment fabric in a low-oxygen setting: Santa Monica Basin, CA

Kemnitz, Nathaniel; Berelson, William M.; Hammond, Douglas E.; Morine, Laura; Figueroa, Maria; Lyons, Timothy W.; Scharf, Simon; Rollins, Nick; Petsios, Elizabeth; Lemieux, Sydnie; Treude, Tina

doi:https://doi.org/10.5194/bg-17-2381-2020

Articles | Volume 17, issue 8

https://doi.org/10.5194/bg-17-2381-2020

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

Special issue:

Ocean deoxygenation: drivers and consequences – past, present...

https://doi.org/10.5194/bg-17-2381-2020

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

Articles | Volume 17, issue 8

Research article

|

30 Apr 2020

Research article |

| 30 Apr 2020

Evidence of changes in sedimentation rate and sediment fabric in a low-oxygen setting: Santa Monica Basin, CA

Nathaniel Kemnitz, William M. Berelson, Douglas E. Hammond, Laura Morine, Maria Figueroa, Timothy W. Lyons, Simon Scharf, Nick Rollins, Elizabeth Petsios, Sydnie Lemieux, and Tina Treude

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Final revised paper (published on 30 Apr 2020)
Supplement to the final revised paper
Preprint (discussion started on 06 Nov 2019)

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'Referee comments for bg2019-420 Kemnitz et al', Christopher Fuller, 27 Dec 2019
- AC1: 'Responses to reviewer #1', Nathaniel Kemnitz, 27 Feb 2020
- AC3: 'Corrected responses to reviewer #1', Nathaniel Kemnitz, 27 Feb 2020
- AC6: 'Final corrected author respone', Nathaniel Kemnitz, 11 Mar 2020
SC1: 'Santa Monica Basin sedimentation rate', Adam Tomašových, 29 Dec 2019
RC2: 'bg-2019-420', Anonymous Referee #2, 08 Feb 2020
- AC2: 'Responses to reviewer #2', Nathaniel Kemnitz, 27 Feb 2020
- AC4: 'Corrected responses to reviewer #2', Nathaniel Kemnitz, 27 Feb 2020
- AC5: 'Final corrected author respone', Nathaniel Kemnitz, 11 Mar 2020

Peer-review completion

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

ED: Publish subject to minor revisions (review by editor) (19 Mar 2020) by S. Wajih A. Naqvi

ED: Publish subject to minor revisions (review by editor) (19 Mar 2020) by Katja Fennel (Co-editor-in-chief)

AR by Nathaniel Kemnitz on behalf of the Authors (24 Mar 2020) Author's response Manuscript

ED: Publish as is (27 Mar 2020) by S. Wajih A. Naqvi

ED: Publish as is (27 Mar 2020) by Katja Fennel (Co-editor-in-chief)

AR by Nathaniel Kemnitz on behalf of the Authors (30 Mar 2020)

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Short summary

Our paper shows how sedimentation in a very low oxygen setting provides a unique record of environmental change. We look at the past 250 years through the filter of sediment accumulation via radioisotope dating and other physical and chemical analyses of these sediments. We conclude, remarkably, that there has been very little change in net sediment mass accumulation through the past 100–150 years, yet just prior to 1900 CE, sediments were accumulating at 50 %–70 % of today's rate.