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- W2960762457 abstract "Three cores recovered off the northwest of Svalbard were studied with respect to glacial/interglacial changes of clay and bulk mineralogy, lithology and organic geochemistry. The cores cover the Late Quaternary Marine Isotope Stages (MIS) 6-1 (ca. 170,000 years) and are located in the vicinity of the Polar Front which separates the warm Atlantic water of the Westspitsbergen Current and the cold Polar Water of the Transpolar Drift. Globally driven changes in the paleoenvironment like the variable advection of warm Atlantic water into the Arctic Ocean can be distinguished from regional events by means of source mineral signatures and organic geochemistry data. In particular, a combination of high organic carbon and low carbonate contents, high C/N-ratios, a particular lithology and a distinct bulk and clay mineral assemblage can be related to Svalbard ice sheet developments between 23,000 and 19,500 14C years. This complex sediment pattern has been traced to the northwest of Spitsbergen as far north as 82°N. Additionally, the same signature has been recognized in detail in upper MIS 5 sediments. The striking similarity of the history of the Svalbard/Barents Sea Ice Sheet during the late and early/middle Weichselian is elaborated. Both sediment horizons are intercalated between biogenic calcite rich core sequences which contain the so-called 'High Productivity Zones' or 'Nordway Events' related to the increased advection of warm Atlantic water to the Arctic Ocean. This study provides further evidence that the meridional circulation pattern has been present during most of the Weichselian and that the ice cover was often reduced in the northeastern Fram Strait and above the Yermak Plateau. Our findings contradict the widely used reconstructions in modelling of the last glaciation cycle and reveal a much more dynamic system in the Fram Strait and southwestern Eurasian Basin of the Arctic Ocean." @default.
- W2960762457 created "2019-07-23" @default.
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- W2960762457 date "2001-09-30" @default.
- W2960762457 modified "2023-09-27" @default.
- W2960762457 title "Sedimentology of three cores recovered off the northwest of Svalbard, supplement to: Vogt, Christoph; Knies, Jochen; Spielhagen, Robert F; Stein, Ruediger (2001): Detailed mineralogical evidence for two nearly identical glacial/deglacial cycles and Atlantic Water advection to the Arctic Ocean during the last 90,000 years. Global and Planetary Change, QUEEN special issue, 31(1-4), 23-44" @default.
- W2960762457 doi "https://doi.org/10.1594/pangaea.728244" @default.
- W2960762457 hasPublicationYear "2001" @default.
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