A nitrate budget of the Bohai Sea based on an isotope mass balance model

Tian, Shichao; Gaye, Birgit; Tang, Jianhui; Luo, Yongming; Li, Wenguo; Lahajnar, Niko; Dähnke, Kirstin; Sanders, Tina; Xiong, Tianqi; Zhai, Weidong; Emeis, Kay-Christian

doi:https://doi.org/10.5194/bg-19-2397-2022

Articles | Volume 19, issue 9

https://doi.org/10.5194/bg-19-2397-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-19-2397-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 9

Research article

|

06 May 2022

Research article |

| 06 May 2022

A nitrate budget of the Bohai Sea based on an isotope mass balance model

Shichao Tian, Birgit Gaye, Jianhui Tang, Yongming Luo, Wenguo Li, Niko Lahajnar, Kirstin Dähnke, Tina Sanders, Tianqi Xiong, Weidong Zhai, and Kay-Christian Emeis

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Final revised paper (published on 06 May 2022)
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Preprint (discussion started on 21 Dec 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: 'comment to manuscript bg-2020-471', Anonymous Referee #1, 16 Mar 2021
- AC1: 'Reply on RC1', Shichao Tian, 15 Apr 2021
- AC2: 'Reply on RC1', Shichao Tian, 19 Apr 2021
SC1: 'Comment on bg-2020-471', Fajin Chen, 07 Aug 2021
- AC4: 'Reply on SC1', Shichao Tian, 24 Aug 2021
RC2: 'A reactive nitrogen budget of the Bohai Sea based on an isotope mass balance model', Anonymous Referee #2, 08 Aug 2021
- AC3: 'Reply on RC2', Shichao Tian, 24 Aug 2021

Peer-review completion

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

ED: Reconsider after major revisions (16 Sep 2021) by Aninda Mazumdar

AR by Shichao Tian on behalf of the Authors (14 Oct 2021) Author's response Author's tracked changes Manuscript

ED: Referee Nomination & Report Request started (18 Oct 2021) by Aninda Mazumdar

RR by Anonymous Referee #3 (19 Mar 2022)

ED: Publish subject to technical corrections (03 Apr 2022) by Aninda Mazumdar

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Short summary

We constrain the nitrogen budget and in particular the internal sources and sinks of nitrate in the Bohai Sea by using a mass-based and dual stable isotope approach based on δ¹⁵N and δ¹⁸O of nitrate. Based on available mass fluxes and isotope data an updated nitrogen budget is proposed. Compared to previous estimates, it is more complete and includes the impact of the interior cycle (nitrification) on the nitrate pool. The main external nitrogen sources are rivers contributing 19.2 %–25.6 %.