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.

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Cited articles

Bian, C., Jiang, W., and Greatbatch, R. J.: An exploratory model study of sediment transport sources and deposits in the Bohai Sea, Yellow Sea, and East China Sea, J. Geophys. Res.-Oceans, 118, 5908–5923, https://doi.org/10.1002/2013JC009116, 2013. a, b, c
Bopp, L., Resplandy, L., Untersee, A., Le Mezo, P., and Kageyama, M.: Ocean (de)oxygenation from the Last Glacial Maximum to the twenty-first century: insights from Earth System models, Philos. T. R. Soc. A, 375, 20160323, https://doi.org/10.1098/rsta.2016.0323, 2017. a, b, c, d
Carton, J. A. and Giese, B. S.: A Reanalysis of Ocean Climate Using Simple Ocean Data Assimilation (SODA), Mon. Weather Rev., 136, 2999–3017, https://doi.org/10.1175/2007MWR1978.1, 2008. a
Chen, C.-T. A., Hsing, L.-Y., Liu, C.-L., and Wang, S.-L.: Degree of nutrient consumption of upwelled water in the Taiwan Strait based on dissolved organic phosphorus or nitrogen, Mar. Chem., 87, 73–86, https://doi.org/10.1016/j.marchem.2004.01.006, 2004. a
Chi, L., Song, X., Yuan, Y., Wang, W., Zhou, P., Fan, X., Cao, X., and Yu, Z.: Distribution and key influential factors of dissolved oxygen off the Changjiang River Estuary (CRE) and its adjacent waters in China, Mar. Pollut. Bull., 125, 440–450, https://doi.org/10.1016/j.marpolbul.2017.09.063, 2017. a, b
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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