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 cm2/ky; maximum values occur close to the Lena River delta. Seawards, the mean accumulation rates decrease from 0.43 to 0.02 g C cm2/ky. The organic matter is predominantly of terrigenous origin. About 0.9106 t/year of organic carbon are buried in the Laptev Sea, and 0.2510**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.

For age determination of sediment core PS2725-5 see Fahl and Stein (1999) data set: doi:10.1594/PANGAEA.85168, for susceptibility of PS2476-4 see Nuernberg et al., (1995) dataset: doi:10.1594/PANGAEA.50903. Further relevant data see Bauch et al. (1999) datasets: doi:10.1594/PANGAEA.711773

Supplement to: Stein, Ruediger; Fahl, Kirsten (2000): Holocene accumulation of organic carbon at the Laptev Sea continental margin (Arctic Ocean): sources, pathways, and sinks. Geo-Marine Letters, 20(1), 27-36