USAP-DC

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Law Dome DE08-OH site noble gases in ice: testing the 86Krexcess proxy Data DOI: https://doi.org/10.15784/601597 Cite as Severinghaus, J. P. (2022) "Law Dome DE08-OH site noble gases in ice: testing the 86Krexcess proxy" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601597. AMD - DIF Record(s) USAP-1643669_1 Abstract This data set consists of high-precision krypton and argon isotope measurements, along with 15N and 18O of O2. This data tests the hypothesis that the 2nd order parameter 86Krexcess (86Kr/82Kr - 40Ar/36Ar) serves as a proxy indicator of past storminess, via atmospheric pressure changes that cause barometric pumping in the firn and hence greater gravitational disequilibrium in the heavier Kr atom than in Ar. These measurements were made as part of the US-Australian Law Dome DE08-OH campaign in 2018-2019. Nitrogen and dioxygen isotopes were also measured. Creator(s): Severinghaus, Jeffrey P. Date Created: 2022-08-16 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Temporal Extent(s) Start: 2018-12-01 - End: 2019-01-30 Award(s) NSF 1643664 Version: 1 Related Project(s) Collaborative Research: Reconstructing Carbon-14 of Atmospheric Carbon Monoxide from Law Dome, Antarctica to Constrain Long-Term Hydroxyl Radical Variability References Buizert, C. and J. P. Severinghaus (2016). Dispersion in deep polar firn driven by synoptic-scale surface pressure variability, The Cryosphere 10, 2099–2111. (doi:10.5194/tc-10-2099-2016) Keywords Antarctica Ice Core Law Dome Noble Gas