Sedimentology, organic geochemistry, and stable isotopes of core PS2138-1

• Main Authors: Knies, Jochen, Stein, Ruediger
• Format: Dataset
• Language: English
• Published: PANGAEA 1998
• Subjects: ARK-VIII/2; AWI_Paleo; Giant box corer; GKG; GLAMAP; Gravity corer (Kiel type); Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS19/112; PS19 EPOS II; PS2138-1; PS2138-2; Quaternary Environment of the Eurasian North; QUEEN; Silicon Cycling in the World Ocean; SINOPS; SL; Svalbard; Arctic; Barents Sea; Atlantic Arctic; Atlantic-Arctic; Berichte zur Polarforschung; Ice Sheet; North Atlantic; Polar Research; Polarforschung; Reports on polar research; Sea ice; Svalbard-Barents Sea Ice sheet
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.728671; https://doi.org/10.1594/PANGAEA.728671

We studied variations in terrigenous (TOM) and marine organic matter (MOM) input in a sediment core on the northern Barents Sea margin over the last 30 ka. Using a multiproxy approach, we reconstructed processes controlling organic carbon deposition and investigated their paleoceanographic significance in the North Atlantic-Arctic Gateways. Variations in paleo-surface-water productivity are not documented in amount and composition of organic carbon. The highest level of MOM was deposited during 25-23 ka as a result of scavenging on fine-grained, reworked, and TOM-rich material released by the retreating Svalbard/Barents Sea ice sheet during the late Weichselian. A second peak of MOM is preserved because of sorptive protection by detrital and terrigenous organic matter, higher surface-water productivity due to permanent intrusion of Atlantic water, and high suspension load release by melting sea ice during 15.9-11.2 ka.