Uranium-Thorium ages and stable oxygen isotope data on speleothems that grew during Marine Isotope Stages (MIS) 11, 9, and 5e, Northwest Territories, Canada, 2024 ...

• Main Authors: Batchelor, Cameron, McGee, David, Shakun, Jeremy, Woodhead, Jon, Jost, Adam, Arnold, Sarah, Horne, Greg, Kinsley, Christopher, Freudenburg-Puricelli, Markey
• Format: Dataset
• Language: English
• Published: NSF Arctic Data Center 2024
• Subjects: speleothem; Canada; interglacial; oxygen; Greenland; Greenland ice cores; Northwest Territories; Subarctic
• Online Access: https://dx.doi.org/10.18739/a2sj19s7m; https://arcticdata.io/catalog/view/doi:10.18739/A2SJ19S7M

High-resolution records from past interglacial climates help constrain future responses to global warming, yet are rare. This dataset contains seasonally-resolved climate records from subarctic-Canada using micron-scale measurements of oxygen isotopes (δ18O) in speleothems with apparent annual growth bands from three interglacial periods – Marine Isotope Stages 11 (409-376 ka), 9 (336-305 ka) and MIS 5e (123-118 ka). Our study highlights the potential for high-latitude speleothems to yield detailed isotopic records of Northern Hemisphere interglacial climates beyond the reach of Greenland ice cores and offers a framework for interpreting them. Table S1 contains the Uranium-Thorium dates for six speleothems, or more specifically, flowstones, from a cave in Northwest Territories (NWT), Canada. It also contains constructed age models for each sample. Then, we applied a two-tiered methodological approach to reconstruct past subarctic climate. First, we produce an ultra-high-resolution δ18O record that, although ...