Articles | Volume 17, issue 22
Biogeosciences, 17, 5745–5761, 2020
https://doi.org/10.5194/bg-17-5745-2020

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

Biogeosciences, 17, 5745–5761, 2020
https://doi.org/10.5194/bg-17-5745-2020

Research article 23 Nov 2020

Research article | 23 Nov 2020

A numerical model study of the main factors contributing to hypoxia and its interannual and short-term variability in the East China Sea

Haiyan Zhang et al.

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Cited articles

Baird, D., Christian, R. R., Peterson, C. H., and Johnson, G. A.: Consequences of hypoxia on estuarine ecosystem function: Energy diversion from consumers to microbes, Ecol. Appl., 14, 805–822, https://doi.org/10.1890/02-5094, 2004. 
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.-Ocean., 118, 5908–5923, https://doi.org/10.1002/2013JC009116, 2013a. 
Bian, C., Jiang, W., Quan, Q., Wang, T., Greatbatch, R. J., and Li, W.: Distributions of suspended sediment concentration in the Yellow Sea and the East China Sea based on field surveys during the four seasons of 2011, J. Mar. Syst., 121/122, 24–35, https://doi.org/10.1016/j.jmarsys.2013.03.013, 2013b. 
Bianchi, T. S., DiMarco, S. F., Cowan, J. H., Hetland, R. D., Chapman, P., Day, J. W., and Allison, M. A.: The science of hypoxia in the northern Gulf of Mexico: A review, Sci. Total Environ., 408, 1471–1484, https://doi.org/10.1016/j.scitotenv.2009.11.047, 2010. 
Bishop, M. J., Powers, S. P., Porter, H. J., and Peterson, C. H.: Benthic biological effects of seasonal hypoxia in a eutrophic estuary predate rapid coastal development, Estuar. Coast. Shelf Sci., 70, 415–422, https://doi.org/10.1016/j.ecss.2006.06.031, 2006. 
Short summary
In coastal seas, low oxygen, which is detrimental to coastal ecosystems, is increasingly caused by man-made nutrients from land. This is especially so near mouths of major rivers, including the Changjiang in the East China Sea. Here a simulation model is used to identify the main factors determining low-oxygen conditions in the region. High river discharge is identified as the prime cause, while wind and intrusions of open-ocean water modulate the severity and extent of low-oxygen conditions.
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