Articles | Volume 19, issue 14
https://doi.org/10.5194/bg-19-3469-2022
https://doi.org/10.5194/bg-19-3469-2022
Research article
 | 
27 Jul 2022
Research article |  | 27 Jul 2022

Interannual variabilities, long-term trends, and regulating factors of low-oxygen conditions in the coastal waters off Hong Kong

Zheng Chen, Bin Wang, Chuang Xu, Zhongren Zhang, Shiyu Li, and Jiatang Hu

Related authors

A high-resolution nested model to study the effects of alkalinity additions in Halifax Harbour, a mid-latitude coastal fjord
Arnaud Laurent, Bin Wang, Dariia Atamanchuk, Subhadeep Rakshit, Kumiko Azetsu-Scott, Chris Algar, and Katja Fennel
EGUsphere, https://doi.org/10.5194/egusphere-2025-3361,https://doi.org/10.5194/egusphere-2025-3361, 2025
This preprint is open for discussion and under review for Biogeosciences (BG).
Short summary
Human Activities Caused Hypoxia Expansion in a Large Eutrophic Estuary: Non-negligible Role of Riverine Suspended Sediments
Yue Nan, Zheng Chen, Bin Wang, Bo Liang, and Jiatang Hu
EGUsphere, https://doi.org/10.5194/egusphere-2024-4013,https://doi.org/10.5194/egusphere-2024-4013, 2025
Short summary
Long-term spatiotemporal variations in and expansion of low-oxygen conditions in the Pearl River estuary: a study synthesizing observations during 1976–2017
Jiatang Hu, Zhongren Zhang, Bin Wang, and Jia Huang
Biogeosciences, 18, 5247–5264, https://doi.org/10.5194/bg-18-5247-2021,https://doi.org/10.5194/bg-18-5247-2021, 2021
Short summary
Can assimilation of satellite observations improve subsurface biological properties in a numerical model? A case study for the Gulf of Mexico
Bin Wang, Katja Fennel, and Liuqian Yu
Ocean Sci., 17, 1141–1156, https://doi.org/10.5194/os-17-1141-2021,https://doi.org/10.5194/os-17-1141-2021, 2021
Short summary
Assessing the value of biogeochemical Argo profiles versus ocean color observations for biogeochemical model optimization in the Gulf of Mexico
Bin Wang, Katja Fennel, Liuqian Yu, and Christopher Gordon
Biogeosciences, 17, 4059–4074, https://doi.org/10.5194/bg-17-4059-2020,https://doi.org/10.5194/bg-17-4059-2020, 2020
Short summary

Related subject area

Biogeochemistry: Coastal Ocean
Spring–neap tidal cycles modulate the strength of the carbon source at the estuary–coast interface
Vlad A. Macovei, Louise C. V. Rewrie, Rüdiger Röttgers, and Yoana G. Voynova
Biogeosciences, 22, 3375–3396, https://doi.org/10.5194/bg-22-3375-2025,https://doi.org/10.5194/bg-22-3375-2025, 2025
Short summary
Spatiotemporal variations in surface marine carbonate system properties across the western Mediterranean Sea using volunteer observing ship data
David Curbelo-Hernández, David González-Santana, Aridane G. González, J. Magdalena Santana-Casiano, and Melchor González-Dávila
Biogeosciences, 22, 3329–3356, https://doi.org/10.5194/bg-22-3329-2025,https://doi.org/10.5194/bg-22-3329-2025, 2025
Short summary
Amplified bottom water acidification rates on the Bering Sea shelf from 1970–2022
Darren J. Pilcher, Jessica N. Cross, Natalie Monacci, Linquan Mu, Kelly A. Kearney, Albert J. Hermann, and Wei Cheng
Biogeosciences, 22, 3103–3125, https://doi.org/10.5194/bg-22-3103-2025,https://doi.org/10.5194/bg-22-3103-2025, 2025
Short summary
Depositional controls and budget of organic carbon burial in fine-grained sediments of the North Sea – the Helgoland Mud Area as a natural laboratory
Daniel Müller, Bo Liu, Walter Geibert, Moritz Holtappels, Lasse Sander, Elda Miramontes, Heidi Taubner, Susann Henkel, Kai-Uwe Hinrichs, Denise Bethke, Ingrid Dohrmann, and Sabine Kasten
Biogeosciences, 22, 2541–2567, https://doi.org/10.5194/bg-22-2541-2025,https://doi.org/10.5194/bg-22-2541-2025, 2025
Short summary
Effects of submarine groundwater on nutrient concentration and primary production in a deep bay of the Japan Sea
Menghong Dong, Xinyu Guo, Takuya Matsuura, Taichi Tebakari, and Jing Zhang
Biogeosciences, 22, 2383–2402, https://doi.org/10.5194/bg-22-2383-2025,https://doi.org/10.5194/bg-22-2383-2025, 2025
Short summary

Cited articles

Bordovskiy, O. K.: Sources of organic matter in marine basins, Mar. Geol., 3, 5–31, https://doi.org/10.1016/0025-3227(65)90003-4, 1965. 
Jolliffe, I. T. and Cadima, J.: Principal component analysis: a review and recent developments, Philos. T. R. Soc. Math. Phys. Eng. Sci., 374, 20150202, https://doi.org/10.1098/rsta.2015.0202, 2016. 
Chen, J., Wang, Z., Tam, C.-Y., Lau, N.-C., Lau, D.-S. D., and Mok, H.-Y.: Impacts of climate change on tropical cyclones and induced storm surges in the Pearl River Delta region using pseudo-global-warming method, Scientific Reports, 10, 1965, https://doi.org/10.1038/s41598-020-58824-8, 2020. 
Chen, Z.: The long-term monthly discharge data of hydrological stations in the Pearl River during 1994–2018, Zenodo [data set], https://doi.org/10.5281/zenodo.6859871, 2022. 
Download
Short summary
Deterioration of low-oxygen conditions in the coastal waters off Hong Kong was revealed by monitoring data over two decades. The declining wind forcing and the increasing nutrient input contributed significantly to the areal expansion and intense deterioration of low-oxygen conditions. Also, the exacerbated eutrophication drove a shift in the dominant source of organic matter from terrestrial inputs to in situ primary production, which has probably led to an earlier onset of hypoxia in summer.
Share
Altmetrics
Final-revised paper
Preprint