Late quaternary organic carbon cycles and paleoproductivity in the Labrador Sea |
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Authors: | Ruediger Stein Rainer Stax |
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Institution: | (1) Alfred-Wegener-Institute for Polar and Marine Research, Columbusstrasse, D-2850 Bremerhaven, Germany |
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Abstract: | Accumulation rates of (marine) organic carbon and estimates of paleoproductivity from organic carbon data indicate distinct
late Quaternary glacial/interglacial cycles at Ocean Drilling Program (ODP) Site 646. During the last 240,000 years, surface-water
productivity was significantly higher in the northern Labrador Sea during interglacial than during glacial times (70 to 170
gC/m2/yr vs. 30 to 70 gC/m2/yr). The reduced glacial productivity is probably caused by a closed sea-ice cover dominating the northern Labrador Sea during
glacial intervals. |
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