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.
Knies, Jochen (1999): Spätquartäre Paläoumweltbedingungen am nördlichen Kontinentalrand der Barents- und Kara-See. Eine Multi-Parameter-Analyse (Late Quaternary paleoenvironment along the northern Barents and Kara seas continental margin. A multi parameter analysis). Berichte zur Polarforschung = Reports on Polar Research, 304, 159 pp, doi:10.2312/BzP_0304_1999
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CC-BY: Creative Commons Attribution 3.0 Unported
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Fonte
Supplement to: Knies, Jochen; Stein, Ruediger (1998): New aspects of organic carbon deposition and its paeoceanographic implications along the northern Barents Sea margin during the last 30,000 years. Paleoceanography, 13(4), 384-394, doi:10.1029/98PA01501
