Discharge of meteoric water in the eastern Norwegian Sea since the last glacial period
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Submarine groundwater discharge could impact the transport of critical solutes to the ocean. However, its driver(s), significance over geological time scales, and geographical coverage are poorly understood. We characterize a submarine groundwater seep from the continental slope off northern Norway where substantial amount of meteoric water was detected. We reconstruct the seepage history from textural relationships and U-Th geochronology of authigenic minerals. We demonstrate how glacial-interglacial dynamics promoted submarine groundwater circulation more than 100 km offshore and resulted in high fluxes of critical solutes to the ocean. This cryosphere-hydrosphere coupling is likely common in the circum-Arctic implying that future decay of glaciers and permafrost in a warming Arctic is expected to attenuate such a coupled process and thus decrease the export of critical solutes.
Hong , W-L , Lepland , A , Himmler , T , Kim , J-H , Chand , S , Sahy , D , Solomon , E A , Rae , J W B , Martma , T , Nam , S-I & Knies , J 2019 , ' Discharge of meteoric water in the eastern Norwegian Sea since the last glacial period ' Geophysical Research Letters , vol. 46 . https://doi.org/10.1029/2019GL084237
Geophysical Research Letters
Copyright © 2019. The Authors. This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
DescriptionThe work is supported by the Research Council of Norway (RCN) through Petromaks2- NORCRUST (project number: 255150) and its Centre of Excellence funding scheme for CAGE (project number: 223259). J.-H. K. is supported by the project "Development on Geochemical Proxies of Isotope and Trace Element for Understanding of Earth and Universe Evolution Processes (GP2017-018)" funded by the Korea Ministry of Science and ICT (MSIT). Svalbard fjord cruise in 2016 with RV Helmer Hanssen for Science Research Program to S.-I.N. is fully supported by MSIT (NRF-2015M1A5A1037243, PN19090).
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