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Burial and Origin of Permafrost-Derived Carbon in the Nearshore Zone of the Southern Canadian Beaufort Sea

Grotheer, H.ORCIDiD
Meyer, V.
Riedel, T.
Pfalz, G.ORCIDiD
Mathieu, L.
Hefter, J.ORCIDiD
Gentz, T.ORCIDiD
Lantuit, H.ORCIDiD
Mollenhauer, G.ORCIDiD
Fritz, M.ORCIDiD
DOI: https://doi.org/10.1029/2019GL085897
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9484
Grotheer, H.; Meyer, V.; Riedel, T.; Pfalz, G.; Mathieu, L.; Hefter, J.; Gentz, T.; Lantuit, H.; Mollenhauer, G.; Fritz, M., 2020: Burial and Origin of Permafrost-Derived Carbon in the Nearshore Zone of the Southern Canadian Beaufort Sea. In: Geophysical Research Letters, Band 47, 3, DOI: 10.1029/2019GL085897.
 
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  • Abstract
Detailed organic geochemical and carbon isotopic (δ13C and Δ14C) analyses are performed on permafrost deposits affected by coastal erosion (Herschel Island, Canadian Beaufort Sea) and adjacent marine sediments (Herschel Basin) to understand the fate of organic carbon in Arctic nearshore environments. We use an end-member model based on the carbon isotopic composition of bulk organic matter to identify sources of organic carbon. Monte Carlo simulations are applied to quantify the contribution of coastal permafrost erosion to the sedimentary carbon budget. The models suggest that ~40% of all carbon released by local coastal permafrost erosion is efficiently trapped and sequestered in the nearshore zone. This highlights the importance of sedimentary traps in environments such as basins, lagoons, troughs, and canyons for the carbon sequestration in previously poorly investigated, nearshore areas.
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  • Geochemie, Mineralogie, Petrologie [395]
Subjects:
permafrost
coastal erosion
biomarker
radiocarbon
carbon flux
carbon burial
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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