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Xueqing Yu, Jianan Liu, Zhuoyi Zhu, Xiaogang Chen, Tong Peng, Jinzhou Du. The significant role of submarine groundwater discharge in an Arctic fjord nutrient budget[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-023-2282-7
Citation: Xueqing Yu, Jianan Liu, Zhuoyi Zhu, Xiaogang Chen, Tong Peng, Jinzhou Du. The significant role of submarine groundwater discharge in an Arctic fjord nutrient budget[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-023-2282-7

The significant role of submarine groundwater discharge in an Arctic fjord nutrient budget

doi: 10.1007/s13131-023-2282-7
Funds:  The National Natural Science Foundation of China under contract Nos 41976040, 41676188, 42106043 and 42006152; Innovation Base for estuarine and coastal water security 2.0 from the Ministry of Science and Technology of P.R. China under contract No BP0820020.
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  • Corresponding author: E-mail: jaliu@sklec.ecnu.edu.cn
  • Received Date: 2023-09-13
  • Accepted Date: 2023-12-07
  • Available Online: 2024-03-11
  • Under global climate change, water flow and related nutrient biogeochemistry in the Arctic are changing at an unprecedented rate, and potentially affect nutrient cycling in the Arctic Ocean. However, nutrient fluxes via submarine groundwater discharge (SGD) are potentially important yet poorly understood in the Arctic. Here we quantified that nutrient fluxes through radium-derived SGD were three orders of magnitude higher than those from the local river and constituted 25-96% of the total nutrient inputs into the Kongsfjorden. These large groundwater nutrient fluxes with high N/P ratio (average 99) may change the biomass and community structure of phytoplankton. Meanwhile, combining other SGD study cases around the Arctic region, SGD rates tend to increase over the past three decades, possibly on account of the effects of global warming. The SGD-derived nutrient may cause the increase of net primary productivity in the Arctic Ocean. The results will provide important basic data for land-ocean interactions in the typical fjord of the Arctic under the influence of global warming.
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