Accumulation of organic carbon in the Laptev Sea

• Main Authors: Stein, Ruediger, Fahl, Kirsten
• Format: Dataset
• Language: English
• Published: PANGAEA 2000
• Subjects: Amundsen Basin; Arctic Ocean; ARK-IX/4; ARK-VIII/2; ARK-VIII/3; ARK-XI/1; AWI_Paleo; Barents Sea; BC; Box corer; C-11; C-37; C-4; C-7; C-8; Gakkel Ridge; Giant box corer; GKG; Gravity corer (Kiel type); Gravity corer (Russian type); KAL; KAL_R; Kara Sea/St. Anna Trough; Kasten corer; Kasten corer RUS; Laptev Sea; MUC; MultiCorer; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; PL-1994; PL94-07; PL94-08; PL94-60; PL94-64; PL94-67; Polarstern; Professor Logachev; PS19/112; PS19/157; PS19/165; PS19/228; PS19 ARCTIC91; PS19 EPOS II; PS2138-1; PS2163-1; PS2170-4; PS2206-4; PS2445-4; PS2446-4; Arctic; Kara Sea; Rus’; St. Anna Trough; amundsen basin; laptev; lena river
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.711774; https://doi.org/10.1594/PANGAEA.711774

Composition and accumulation rates of organic carbon in Holocene sediments provided data to calculate an organic carbon budget for the Laptev Sea continental margin. Mean Holocene accumulation rates in the inner Laptev Sea vary between 0.14 and 2.7 g C cm**2/ky; maximum values occur close to the Lena River delta. Seawards, the mean accumulation rates decrease from 0.43 to 0.02 g C cm**2/ky. The organic matter is predominantly of terrigenous origin. About 0.9*10**6 t/year of organic carbon are buried in the Laptev Sea, and 0.25*10**6 t/year on the continental slope. Between about 8.5 and 9 ka, major changes in supply of terrigenous and marine organic carbon occur, related to changes in coastal erosion, Siberian river discharge, and/or Atlantic water inflow along the Eurasian continental margin.