Coastal Supra-Permafrost Aquifers of the Arctic and Their Significant Groundwater, Carbon, and Nitrogen Fluxes

被引:0
|
作者
Demir, Cansu [1 ]
Mcclelland, James W. [2 ]
Bristol, Emily [3 ]
Charette, Matthew A. [4 ]
Cardenas, M. Bayani [1 ]
机构
[1] Univ Texas Austin, Dept Earth & Planetary Sci, Austin, TX 78712 USA
[2] Marine Biol Lab, Ecosyst Ctr, Woods Hole, MA USA
[3] Univ Texas Austin, Marine Sci Inst, Port Aransas, TX USA
[4] Woods Hole Oceanog Inst, Marine Chem & Geochem, Woods Hole, MA USA
基金
美国国家科学基金会;
关键词
submarine groundwater discharge; coastal Arctic lagoons; Cryohydrogeology; groundwater-surface water interactions; permafrost; ACTIVE-LAYER; NORTH SLOPE; DISCHARGE; TEMPERATURE; NUTRIENTS; LAGOON; WATER; THICKNESS; SHALLOW; ALASKA;
D O I
10.1029/2024GL109142
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Fresh submarine groundwater discharge (FSGD) can deliver significant fluxes of water and solutes from land to sea. In the Arctic, which accounts for similar to 34% of coastlines globally, direct observations and knowledge of FSGD are scarce. Through integration of observations and process-based models, we found that regardless of ice-bonded permafrost depth at the shore, summer SGD flow dynamics along portions of the Beaufort Sea coast of Alaska are similar to those in lower latitudes. Calculated summer FSGD fluxes in the Arctic are generally higher relative to low latitudes. The FSGD organic carbon and nitrogen fluxes are likely larger than summer riverine input. The FSGD also has very high CO2 making it a potentially significant source of inorganic carbon. Thus, the biogeochemistry of Arctic coastal waters is potentially influenced by groundwater inputs during summer. These water and solute fluxes will likely increase as coastal permafrost across the Arctic thaws.
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页数:11
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