Articles | Volume 21, issue 12
https://doi.org/10.5194/cp-21-2579-2025
https://doi.org/10.5194/cp-21-2579-2025
Research article
 | 
12 Dec 2025
Research article |  | 12 Dec 2025

Delivery of aged terrestrial organic matter to the Laptev Sea during the last deglaciation

Arnaud Nicolas, Jens Hefter, Hendrik Grotheer, Tommaso Tesi, Ruediger Stein, Alessio Nogarotto, Eduardo Queiroz Alves, and Gesine Mollenhauer

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Short summary
We analyzed a high-resolution marine sediment record from the Laptev Sea to reconstruct deglacial permafrost thaw events during the last 16 kyr. Using biomarkers and radiocarbon dating, we found that peaks in pre-aged terrigenous material coincided with rapid sea-level rise, indicating coastal erosion as the main mobilization mechanism. This research provides insights into past permafrost carbon release, informing predictions of future climate-permafrost feedback in a warming world.
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