USAP-DC

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Law Dome DE08-OH firn air 15N, O2/N2, Ar/N2, 18O of O2 Data DOI: https://doi.org/10.15784/601598 Cite as Severinghaus, J. P. (2022) "Law Dome DE08-OH firn air 15N, O2/N2, Ar/N2, 18O of O2" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601598. AMD - DIF Record(s) USAP-1643669_1 Abstract This data set comprises measurements of noble and inert gases in the firn at the DE08-OH site sampled in 2018-2019 near the summit of Law Dome, Antarctica. The data show the expected gravitational enrichment of heavy isotopes with depth, somewhat attenuated by the high accumulation rate and a near-surface well-mixed zone (convective zone), and the "lock-in" horizon at 68 m depth. As seen at many other sites, the heavy isotope of oxygen 18O is depleted progressively with depth within the lock-in zone due to faster gas permeation of 16O16O relative to 18O16O from compressed air bubbles. 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 Battle, M. O., J. P. Severinghaus, E. D. Sofen, D. Plotkin, A. J. Orsi, M. Aydin, S. A. Montzka, T. Sowers, and P. P. Tans (2011). Controls on the movement and composition of firn air at the West Antarctic Ice Sheet Divide. Atmos. Chem. Phys. 11, 11007-11021. (doi:10.5194/acp-11-11007-2011) Keywords Antarctica Firn Firn Density Gravitational Settling Inert Gases Law Dome