Articles | Volume 17, issue 10
Biogeosciences, 17, 2701–2714, 2020
https://doi.org/10.5194/bg-17-2701-2020

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

Biogeosciences, 17, 2701–2714, 2020
https://doi.org/10.5194/bg-17-2701-2020

Research article 19 May 2020

Research article | 19 May 2020

Quantifying the contributions of riverine vs. oceanic nitrogen to hypoxia in the East China Sea

Fabian Große et al.

Model code and software

Regional Ocean Modeling System (ROMS), version 3.7, with added capability to produce output for the ETRAC software Fabian Große https://github.com/FabianGrosse/ROMS_3.7_for_ETRAC

Element TRACing software for numerical models (ETRAC) Fabian Große https://github.com/FabianGrosse/ETRAC

Short summary
In the East China Sea, hypoxia occurs frequently from spring to fall due to high primary production and subsequent decomposition of organic matter. Nitrogen inputs from the Changjiang and the open ocean have been suggested to contribute to hypoxia formation. We used a numerical modelling approach to quantify the relative contributions of these nitrogen sources. We found that the Changjiang dominates, which suggests that nitrogen management in the watershed would improve oxygen conditions.
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