Coarse fraction and planktic stable isotope data from sediment core PS93/031-5 (NW Fram Strait)

• Main Authors: Spielhagen, Robert F, Mackensen, Andreas
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: AGE; 14C calibrated; CALIB 8.2 and IntCal20; ARK-XXIX/2.1; Coarse fraction; DEPTH; sediment/rock; ECHONEG; Environmental and Climate History Off NorthEast Greenland; Fram Strait; Giant box corer; GKG; Ice volume corrected; isotopes; Mass spectrometer; Finnigan; MAT 253; coupled with Carbonate preparation device; KIEL IV; Neogloboquadrina pachyderma; δ13C; δ13C standard deviation; δ18O; δ18O standard deviation; North Greenland Sea; Polarstern; PS93/031-5; PS93.1; Quaternary; Size fraction > 0.063 mm; sand; System Laptev-Sea: Transdrift; TRANSDRIFT; Δδ18O; Arctic; Greenland; Greenland Sea; laptev; Laptev Sea; North Atlantic; North Greenland
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.930316; https://doi.org/10.1594/PANGAEA.930316

The coarse fraction content and the oxygen and carbon isotopic compositions of two morphotyes of planktic foraminifers Neogloboquadrina pachyderma were determined from sediment samples obtained from sediment core PS93/031-5. The age model is based on 9 radiocarbon datings obtained on ~2000 specimens of N. pachyderma each. Grain size measurements occurred in May-July 2017. Stable isotope measurements were performed in August 2018 to February 2019. According to radiocarbon datings (https://doi.pangaea.de/10.1594/PANGAEA.930416) converted to calibrated years with the program Calib 8.2 (http://calib.org/calib/), using the IntCal20 data set and applying a reservoir correction of 550 years), the core covers the interval of 3,750-23,230 years before present, with the hiatus covering the interval 12,660-18,550 years. Sediment core PS93/031-5 was obtained during RV POLARSTERN expedition PS93.1 in the northwestern Fram Strait on the Northeast Greenland continental margin from 2,135 m water depth. The data were collected to reconstruct the Late Quaternary paleoenvironment in the northwestern Fram Strait, the glacial history of the northeast Greenland shelf, and the export of freshwater from the Arctic to the North Atlantic in the last ca. 21,000 years. Sediment slices of approx. 5 mm thickness were taken from sediment core PS93/031-5 every 0.5 cm (~30 g dry sediment per sample). Sediments were freeze-dried, weighed, and washed with deionized water through a 63 µm mesh. The remaining coarse fraction was dried at 50°C and weighed. Coarse fraction percentages were calculated as [coarse fraction weight] * 100 / [dry bulk weight]. Planktic foraminifers Neogloboquadrina pachyderma were hand-picked from the 100-250 µm fraction for stable isotope measurements. 25 specimens of morphotypes 1 and 2 as well as 40 specimens of morphotypes 4 and 5 (following the morphotype concept of Eynaud, 2011) were analyzed separately for stable oxygen and carbon isotope compositions (δ18O, δ13C) in the stable isotope lab of AWI on a Finnigan MAT ...