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

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Wei-Li Hong, Aivo Lepland, Tobias Himmler, Ji-Hoon Kim, Shyam Chand, Diana Sahy, Evan A. Solomon, James W. B. Rae, Tõnu Martma, Seung-Il Nam, Jochen Knies

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Abstract

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.
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Original languageEnglish
Number of pages11
JournalGeophysical Research Letters
Volume46
Early online date19 Jul 2019
DOIs
Publication statusE-pub ahead of print - 19 Jul 2019

    Research areas

  • Ssubmarine groundwater discharge, Arctic Ocean, Methane emission, Authigenic mineral

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