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


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).

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Creator Farmer, Jesse R ORCID logo; Keller, Katherine; Poirier, Robert K ORCID logo; Dwyer, Gary S; Schaller, Morgan F ORCID logo; Coxall, Helen ORCID logo; O'Regan, Matt ORCID logo; Cronin, Thomas M
Publisher PANGAEA
Publication Year 2023
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 4519 data points
Discipline Earth System Research
Spatial Coverage (-154.210W, 75.310S, 146.561E, 88.450N); Lomonosov Ridge, Arctic Ocean; Northwind Ridge; Mendeleev Ridge
Temporal Coverage Begin 1992-09-01T00:00:00Z
Temporal Coverage End 2005-09-09T00:00:00Z