Submarine groundwater discharge and seasonal hypoxia off the Changjiang River Estuary

Tianyi Zhu; Bochao Xu; Xiaoyi Guo; Qinsheng Wei; Ergang Lian; Pengxia Liu; William C. Burnett; Qingzhen Yao; Zhigang Yu

doi:10.1007/s13131-023-2256-9

Volume 42 Issue 8

Aug. 2023

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Tianyi Zhu, Bochao Xu, Xiaoyi Guo, Qinsheng Wei, Ergang Lian, Pengxia Liu, William C. Burnett, Qingzhen Yao, Zhigang Yu. Submarine groundwater discharge and seasonal hypoxia off the Changjiang River Estuary[J]. Acta Oceanologica Sinica, 2023, 42(8): 125-133. doi: 10.1007/s13131-023-2256-9

Citation:

Tianyi Zhu, Bochao Xu, Xiaoyi Guo, Qinsheng Wei, Ergang Lian, Pengxia Liu, William C. Burnett, Qingzhen Yao, Zhigang Yu. Submarine groundwater discharge and seasonal hypoxia off the Changjiang River Estuary[J]. Acta Oceanologica Sinica, 2023, 42(8): 125-133. doi: 10.1007/s13131-023-2256-9

Citation:

Tianyi Zhu, Bochao Xu, Xiaoyi Guo, Qinsheng Wei, Ergang Lian, Pengxia Liu, William C. Burnett, Qingzhen Yao, Zhigang Yu. Submarine groundwater discharge and seasonal hypoxia off the Changjiang River Estuary[J]. Acta Oceanologica Sinica, 2023, 42(8): 125-133. doi: 10.1007/s13131-023-2256-9

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Submarine groundwater discharge and seasonal hypoxia off the Changjiang River Estuary

doi: 10.1007/s13131-023-2256-9

Tianyi Zhu^{1, 2, 3, 4},
Bochao Xu^{1, 2
,
,},
Xiaoyi Guo^{1, 2, 3},
Qinsheng Wei^{2, 5},
Ergang Lian^{6, 7},
Pengxia Liu⁶,
William C. Burnett⁸,
Qingzhen Yao^{1, 2},
Zhigang Yu^{1, 2}

1.
Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education, Ocean University of China, Qingdao 266100, China
2.
Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
3.
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
4.
Academy of the Future Ocean, Ocean University of China, Qingdao 266100, China
5.
Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266100, China
6.
Research Center for Monitoring and Environmental Sciences, Taihu Basin and East China Sea Ecological Environment Supervision and Administration Authority, Ministry of Ecology and Environment, Shanghai 200120, China
7.
State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
8.
Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee FL 32306, USA

Funds: The National Natural Science Foundation of China under contract Nos 42130410 and U22A20580; the Fundamental Research Funds for the Central Universities under contract No. 202341002.

More Information

Corresponding author: E-mail: xubc@ouc.edu.cn
Received Date: 2023-07-07
Accepted Date: 2023-09-11

Available Online: 2023-09-22

Publish Date: 2023-08-31

Abstract

Abstract

Hypoxia is a common phenomenon in the sea adjacent to the Changjiang River Estuary (CJE), one of the global major estuaries. Submarine groundwater discharge (SGD) is a widely recognized pathway for terrestrial materials entering the sea, and has been found to be significant off the CJE. We used a ²²²Rn mass balance model to estimate the SGD fluxes off the CJE and showed that it is linked to seasonal dissolved oxygen (DO) variations. Average SGD fluxes were estimated to be (0.012 ± 0.010) m³/(m²·d) in winter, (0.034 ± 0.015) m³/(m²·d) in summer, and (0.020 ± 0.010) m³/(m²·d) in autumn. We found a significant negative correlation between DO concentrations and SGD rates with groundwater discharge being highest in the summer flood season. In addition, distribution patterns of SGD and hypoxia zones in summer are spatially overlapped, indicating that SGD is an important contributor to summer hypoxia in this region.
- submarine groundwater discharge,
- ²²²Rn,
- hypoxia,
- ²²⁶Ra

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References(65)

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