中文版 | English
Title

Submarine Groundwater Discharge in the Northern Bohai Sea, China: Implications for Coastal Carbon Budgets and Buffering Capacity

Author
Corresponding AuthorXiao, Kai; Li, Hailong
Publication Years
2022-08-01
DOI
Source Title
ISSN
2169-8953
EISSN
2169-8961
Volume127Issue:8
Abstract
Submarine groundwater discharge (SGD) has been widely recognized as an important source of dissolved nutrients in coastal waters and affects nutrient biogeochemistry. In contrast, little information is available on SGD impacts on coastal carbon budgets. Here, we assessed the SGD and associated carbon (dissolved inorganic carbon [DIC] and total alkalinity [TA]) fluxes in Liaodong Bay (the largest bay of the Bohai Sea, China) and discussed their border implications for coastal DIC budget and buffering capacity. Based on Ra-223 and Ra-228 mass balance models, the SGD flux was estimated to be (0.92-1.43) x 10(9) m(3) d(-1). SGD was the largest contributor of DIC, accounting for 55%-77% of the total DIC sources. The low ratio (<1) of SGD-derived TA to DIC fluxes and negative correlation between radium isotopes and pH in seawater implied that SGD would potentially reduce seawater pH in Liaodong Bay. Combining the groundwater carbon data in Liaodong Bay with literature data, we found that the SGD-derived DIC flux off China was 4-9 times greater than those from rivers. By analyzing the TA/DIC ratios in groundwater along the Chinese coast and related carbon fluxes, SGD was thought to partially reduce the CO2 buffer capacity in receiving seawater. These results obtained at the bay scale and national scale suggest that SGD is a significant component of carbon budget and may play a critical role in modulating coastal buffering capacity and atmospheric CO2 sequestration.
Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
Corresponding
Funding Project
National Natural Science Foundation of China["42130703","42007170"] ; Science, Technology and Innovation Commission of Shenzhen[20200925174525002]
WOS Research Area
Environmental Sciences & Ecology ; Geology
WOS Subject
Environmental Sciences ; Geosciences, Multidisciplinary
WOS Accession No
WOS:000842522800001
Publisher
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:1
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/394087
DepartmentSchool of Environmental Science and Engineering
Affiliation
1.China Univ Geosci Beijing, Sch Water Resources & Environm, MOE Key Lab Groundwater Circulat & Environm Evolu, Beijing, Peoples R China
2.Chinese Acad Geol Sci, Inst Karst Geol, Guilin, Peoples R China
3.Woods Hole Oceanog Inst, Dept Marine Chem & Geochem, Woods Hole, MA 02543 USA
4.Southern Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Integrated Surface, Shenzhen, Peoples R China
Corresponding Author AffilicationSchool of Environmental Science and Engineering
Recommended Citation
GB/T 7714
Zhang, Yan,Zou, Changpei,Wang, Zhaohui Aleck,et al. Submarine Groundwater Discharge in the Northern Bohai Sea, China: Implications for Coastal Carbon Budgets and Buffering Capacity[J]. Journal of Geophysical Research-Biogeosciences,2022,127(8).
APA
Zhang, Yan.,Zou, Changpei.,Wang, Zhaohui Aleck.,Wang, Xuejing.,Zeng, Zhenzhong.,...&Li, Hailong.(2022).Submarine Groundwater Discharge in the Northern Bohai Sea, China: Implications for Coastal Carbon Budgets and Buffering Capacity.Journal of Geophysical Research-Biogeosciences,127(8).
MLA
Zhang, Yan,et al."Submarine Groundwater Discharge in the Northern Bohai Sea, China: Implications for Coastal Carbon Budgets and Buffering Capacity".Journal of Geophysical Research-Biogeosciences 127.8(2022).
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