Tracing the footprint of permafrost carbon supply to the Canadian Beaufort Sea ...

• Main Authors: Bröder, Lisa, Lattaud, Julie, Juhls, Bennet, Eulenburg, Antje, Priest, Taylor, Fritz, Michael, Matsuoka, Atsushi, Pellerin, André, Bossé-Demers, Thomas, Rudbäck, Daniel, O'Regan, Matt, Whalen, Dustin, Haghipour, Negar, Eglinton, Timothy I., Overduin, Paul, Vonk, Jorien
• Format: Text
• Language: English
• Published: ETH Zurich 2022
• Subjects: Arctic; Mackenzie River; Beaufort Sea; Mackenzie river; permafrost
• Online Access: https://dx.doi.org/10.3929/ethz-b-000593583; http://hdl.handle.net/20.500.11850/593583

The Canadian Beaufort Sea receives large quantities of sediment, organic carbon and nutrients from rapid coastal erosion and permafrost degradation. In addition, the Mackenzie River, the largest North American Arctic river, discharges great amounts of freshwater, dissolved solids and suspended sediments to the Beaufort Sea. Current changes in these fluxes in response to the warming climate have uncertain consequences for the carbon budget on the shelf and in the deep ocean. To investigate the movement and transformation of organic matter along the land-ocean continuum, we collected water and surface sediment samples along five major transects across the Beaufort Sea during the 2021 expedition of the Canadian Coast Guard Ship Amundsen. Sampling locations span from shallow, coastal, sites with water depths ≤ 20 m, to shelf-break and deep-water settings on the continental slope (water depths of ≥1000 m). For this study, we use stable and radiocarbon isotopic (δ13C and Δ14C) analyses of dissolved inorganic ... : EGUsphere ...