Discharge of meteoric water in the eastern Norwegian Sea since the last glacial period

The 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 Elemen...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Hong, Wei-Li, Lepland, Aivo, Himmler, Tobias, Kim, Ji-Hoon, Chand, Shyam, Sahy, Diana, Solomon, Evan A., Rae, James W. B., Martma, Tõnu, Nam, Seung-Il, Knies, Jochen
Other Authors: University of St Andrews. School of Earth & Environmental Sciences, University of St Andrews. St Andrews Isotope Geochemistry
Format: Article in Journal/Newspaper
Language:English
Published: 2019
Subjects:
Ssubmarine groundwater discharge
Arctic Ocean
Methane emission
Authigenic mineral
G Geography (General)
GC Oceanography
DAS
G1
GC
Arctic
Hanssen
Norway
Norwegian Sea
Svalbard
Northern Norway
permafrost
Online Access:http://hdl.handle.net/10023/18146
https://doi.org/10.1029/2019GL084237
Description
Summary:The 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). 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. Publisher PDF Peer reviewed

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