Articles | Volume 15, issue 12
The Cryosphere, 15, 5529–5555, 2021
https://doi.org/10.5194/tc-15-5529-2021
The Cryosphere, 15, 5529–5555, 2021
https://doi.org/10.5194/tc-15-5529-2021

Research article 10 Dec 2021

Research article | 10 Dec 2021

Fractionation of O2∕N2 and Ar∕N2 in the Antarctic ice sheet during bubble formation and bubble–clathrate hydrate transition from precise gas measurements of the Dome Fuji ice core

Ikumi Oyabu et al.

Data sets

Dome Fuji ice core gas data (112 - 2001m, 15N, O2/N2, Ar/N2) I. Oyabu, K. Kawamura, K. Kitamura, M. Hirabayashi, S. Aoki, S. Morimoto, and T. Nakazawa  https://doi.org/10.17592/001.2021043001

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Short summary
We present O2/N2 and Ar/N2 records from the Dome Fuji ice core through the bubbly ice, bubble–clathrate transition, and clathrate ice zones without gas-loss fractionation. The insolation signal is preserved through the clathrate formation. The relationship between Ar/Ν2 and Ο22 suggests that the fractionation for the bubble–clathrate transition is mass independent, while the bubble close-off process involves a combination of mass-independent and mass-dependent fractionation for O2 and Ar.