The oxygen isotopic composition of intermediate-to-deep Arctic seawater since 600 ka ...

• Main Authors: Farmer, Jesse R, Keller, Katherine, Poirier, Robert K, Dwyer, Gary S, Schaller, Morgan F, Coxall, Helen, O'Regan, Matt, Cronin, Thomas M
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: Arctic Ocean; Benthic foraminiferal stable isotopes; Mg/Ca paleothermometry; ostracodes; oxygen isotope data; Seawater δ18O; Event label; Latitude of event; Longitude of event; Elevation of event; DEPTH, sediment/rock; AGE; Cassidulina teretis, δ18O; Cibicidoides wuellerstorfi, δ18O; Cibicidoides wuellerstorfi, δ18O standard deviation; Oridorsalis tener, δ18O; Magnesium/Calcium ratio; Bottom water temperature; δ18O, seawater, reconstructed; Trigger corer; Piston corer; Box corer; Normalized to Cibicidoides wuellerstorfi; Normalized to Uvigerina; calculated, 1 sigma; interpolated; Calculated; HLY0503; Arctic_Summer_West_1992; P1-93-AR; Arctic_Ocean_Section_1994; Healy; Polar Star; Polar Sea; Arctic; Foraminifera*
• Online Access: https://dx.doi.org/10.1594/pangaea.958539; https://doi.pangaea.de/10.1594/PANGAEA.958539

The oxygen isotopic composition of benthic foraminifera (d18Ob) is widely used to date and correlate marine sediment sequences. However, d18Ob has found comparatively little use in the Arctic Ocean due both to uncertainty in Arctic marine sediment chronology and the lack of resemblance between Arctic and open ocean d18Ob records. We address this issue by combining Arctic d18Ob records (Cronin et al., 2019) with benthic ostracode Mg/Ca-BWT reconstructions (Cronin et al., 2017) to create a composite record of the history of seawater d18O in the intermediate-to-deep Arctic Ocean over the last 600 kyr. Seawater d18O and its uncertainty was calculated using PSU Solver (Thirumalai et al., 2016). ...