Seasonal cycling of zinc and cobalt in the south-eastern Atlantic along the GEOTRACES GA10 section

Wyatt, Neil J.; Milne, Angela; Achterberg, Eric P.; Browning, Thomas J.; Bouman, Heather A.; Woodward, E. Malcolm S.; Lohan, Maeve C.

doi:https://doi.org/10.5194/bg-18-4265-2021

Articles | Volume 18, issue 14

https://doi.org/10.5194/bg-18-4265-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-18-4265-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 14

Research article

|

21 Jul 2021

Research article |

| 21 Jul 2021

Seasonal cycling of zinc and cobalt in the south-eastern Atlantic along the GEOTRACES GA10 section

Neil J. Wyatt, Angela Milne, Eric P. Achterberg, Thomas J. Browning, Heather A. Bouman, E. Malcolm S. Woodward, and Maeve C. Lohan

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Final revised paper (published on 21 Jul 2021)
Supplement to the final revised paper
Preprint (discussion started on 06 Mar 2020)
Supplement to the preprint

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'Review of Wyatt et al. BG; ‘Seasonal cycling of zinc and cobalt in the Southeast Atlantic along the GEOTRACES GA10 section’', Anonymous Referee #1, 29 Mar 2020
- AC1: 'Author response to RC1 comments', Neil Wyatt, 24 Jun 2020
- AC2: 'Author response to RC1 comments', Neil Wyatt, 24 Jun 2020
RC2: 'Review for Wyatt et al - Seasonal cycling of zinc and cobalt in the Southeast Atlantic along the GEOTRACES GA10 section', Anonymous Referee #2, 04 May 2020
- AC3: 'Author response to RC2 comments', Neil Wyatt, 24 Jun 2020

Peer-review completion

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

ED: Reconsider after major revisions (13 Jul 2020) by Clare Woulds

AR by Neil Wyatt on behalf of the Authors (04 Sep 2020) Author's response Manuscript

ED: Referee Nomination & Report Request started (08 Oct 2020) by Clare Woulds

RR by Anonymous Referee #1 (03 Nov 2020)

RR by Anonymous Referee #2 (06 Nov 2020)

Suggestions for revision or reasons for rejection

Review of Wyatt et al. revised manuscript: “Seasonal cycling of zinc and cobalt in the Southeast Atlantic along the GEOTRACES GA10 section.”

I appreciate the care with which the authors have addressed previous comments and revised their manuscript. I find the revision much improved and I think it will make welcome addition to the literature. I am sure the authors and I could continue to discuss minor points of the text, but I don’t think these necessarily require changes. Should the authors wish to make small adjustments, I make the following minor suggestions. However, I am also satisfied if the authors and editor decide to publish the manuscript in its current form, and I would support this decision.

Minor comments
Abstract: The final sentence of the abstract summarizes the topic of the paper, which is also more or less stated by the title. I think the authors could better highlight what they see as their key results and the implications of these results in the abstract, as they do in the conclusions.
Line 131: I don’t think using the lowest standard deviation of the blank experienced is a fair representation of the general limit of detection. An average standard deviation or a range of typical values would be more suitable.
Lines 286-297: I agree with the authors that dust deposition is unlikely to have a major influence and I appreciate that the authors have clearly laid out their determination of this. But I find this section a bit long to make a point that dust is <1%, and it distracts my attention from what is driving the changes. Perhaps this section can be simplified to cover only a couple lines, as with the discussion of potential river influence (313-317).

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ED: Publish subject to minor revisions (review by editor) (25 Nov 2020) by Clare Woulds

AR by Neil Wyatt on behalf of the Authors (08 Dec 2020) Author's response Manuscript

ED: Publish as is (04 Jan 2021) by Clare Woulds

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Short summary

Using data collected during two expeditions to the South Atlantic Ocean, we investigated how the interaction between external sources and biological activity influenced the availability of the trace metals zinc and cobalt. This is important as both metals play essential roles in the metabolism and growth of phytoplankton and thus influence primary productivity of the oceans. We found seasonal changes in both processes that helped explain upper-ocean trace metal cycling.