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

Oyabu, Ikumi; Kawamura, Kenji; Uchida, Tsutomu; Fujita, Shuji; Kitamura, Kyotaro; Hirabayashi, Motohiro; Aoki, Shuji; Morimoto, Shinji; Nakazawa, Takakiyo; Severinghaus, Jeffrey P.; Morgan, Jacob D.

doi:https://doi.org/10.5194/tc-15-5529-2021

Articles | Volume 15, issue 12

The Cryosphere, 15, 5529–5555, 2021

https://doi.org/10.5194/tc-15-5529-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

The Cryosphere, 15, 5529–5555, 2021

https://doi.org/10.5194/tc-15-5529-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 15, issue 12

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

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 Ο₂/Ν₂ 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.