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


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on tc-2021-147', Anonymous Referee #1, 05 Jul 2021
    • AC1: 'Reply on RC1', Ikumi Oyabu, 15 Aug 2021
  • RC2: 'Comment on tc-2021-147', Anonymous Referee #2, 27 Aug 2021
    • AC2: 'Reply on RC2', Ikumi Oyabu, 31 Aug 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to revisions (further review by editor and referees) (14 Sep 2021) by Nanna Bjørnholt Karlsson
AR by Ikumi Oyabu on behalf of the Authors (20 Sep 2021)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (21 Sep 2021) by Nanna Bjørnholt Karlsson
RR by Anonymous Referee #2 (28 Oct 2021)
ED: Publish subject to technical corrections (11 Nov 2021) by Nanna Bjørnholt Karlsson
AR by Ikumi Oyabu on behalf of the Authors (12 Nov 2021)  Author's response    Manuscript
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.