Cruise No. MSM39 - June 07-June 25, 2014 - St. John's (Canada) - St. John's (Canada) (English)

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Abrupt millennial-scale climate fluctuations have been associated with changes in the Atlantic Meridional Overturning Circulation (AMOC) and particularly North Atlantic Deep Water (NADW) formation. Information on the history of Labrador Sea Water (LSW) formation, an important process contributing at present to NADW formation, is still sparse. The primary goal of Expedition MSM39 was to recover a suite of samples that will allow us to reconstruct changes in water mass formation and stratification during the present (Holocene) and the last (Isotope Stage 5.5) interglacial based on a detailed calibration of paleoceanographic tracers to the modern hydrography. We successfully sampled sediments and water column on the continental slope off Newfoundland and in the Orphan Knoll Region with gravity corer, multicorer, rosette/CTD, multinet, and shipboard pump systems. The samples and data will allow us to explore the history of LSW formation and its relation to external and internal forcing factors. The investigations have been carried out in the framework of the research area "Ocean and Climate" of the DFG Research Center and Cluster of Excellence MARUM.