Articles | Volume 15, issue 20
https://doi.org/10.5194/bg-15-6105-2018
https://doi.org/10.5194/bg-15-6105-2018
Research article
 | 
18 Oct 2018
Research article |  | 18 Oct 2018

Impacts of anthropogenic inputs on hypoxia and oxygen dynamics in the Pearl River estuary

Bin Wang, Jiatang Hu, Shiyu Li, Liuqian Yu, and Jia Huang

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Cited articles

Chung, J., Gary, C., and Heinke, W.: Pearl River Estuary Pollution Project (PREPP), Cont. Shelf Res., 24, 1739–1744, 2004. 
Diaz, R. J. and Rosenberg, R.: Spreading Dead Zones and Consequences for Marine Ecosystems, Science, 321, 926–929, https://doi.org/10.1126/science.1156401, 2008. 
Du, J. and Shen, J.: Decoupling the influence of biological and physical processes on the dissolved oxygen in the Chesapeake Bay, J. Geophys. Res.-Ocean., 120, 78–93, https://doi.org/10.1002/2014JC010422, 2015. 
Fontugne, M. R. and Jouanneau, J.-M.: Modulation of the particulate organic carbon flux to the ocean by a macrotidal estuary: Evidence from measurements of carbon isotopes in organic matter from the Gironde system, Estuar. Coast. Shelf Sci., 24, 377–387, https://doi.org/10.1016/0272-7714(87)90057-6, 1987. 
Forrest, D. R., Hetland, R. D., and Dimarco, S. F.: Multivariable statistical regression models of the areal extent of hypoxia over the Texas-Louisiana continental shelf, Environ. Res. Lett., 6, 1–10, https://doi.org/10.1088/1748-9326/6/4/045002, 2011. 
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A physical–biogeochemical model was applied to study the response of hypoxia and oxygen dynamics to different riverine inputs. Results showed that the hypoxia in the Pearl River estuary was most sensitive to riverine inputs of POC, followed by DO and nutrients. This study also highlighted the significance of re-aeration for its buffering effects; i.e. the re-aeration responded rapidly to the perturbations of riverine inputs and in turn moderated the DO changes impacted by these perturbations.
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