Articles | Volume 19, issue 9
Biogeosciences, 19, 2397–2415, 2022
https://doi.org/10.5194/bg-19-2397-2022
Biogeosciences, 19, 2397–2415, 2022
https://doi.org/10.5194/bg-19-2397-2022
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 et al.

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