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South Pole Ice Core Isotopes of N2 and Ar Data DOI: https://doi.org/10.15784/601517 Cite as Morgan, J., & Severinghaus, J. P. (2022) "South Pole Ice Core Isotopes of N2 and Ar" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601517. AMD - DIF Record(s) USAP-1443710_1 Abstract We present measurements gas measurements from the South Pole Ice Core, including the isotopic composition of molecular nitrogen (δ15N) and argon (δ40Ar), and the argon-nitrogen ratio (δAr/N2). The measurements were made between approximately 490 and 1310 m depth, which is between 5 and 30 kyr BP on the SP19 Gas Chronology. The measurements allow us to reconstruct the past amounts of gravitational and thermal fractionation in the firn and thus reconstruct past firn thickness and temperature gradient. These reconstructions are also included. Creator(s): Morgan, Jacob; Severinghaus, Jeffrey P. Date Created: 2022-02-03 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Spatial Extent(s) West: 0, East: 0, South: -90, North: -90 Award(s) NSF 1443710 Version: 1 Related Project(s) Collaborative Research: Inert Gas and Methane Based Climate Records throughout the South Pole Deep Ice Core Keywords Antarctica Antarctica Argon Argon Isotopes Firn Firn Temperature Gradient Firn Thickness Gas Isotopes Gas Isotopes Glaciers/ice Sheet Glaciology Ice Core Ice Core Records Nitrogen Nitrogen Isotopes South Pole South Pole SPICEcore