Articles | Volume 15, issue 24
Research article
16 Dec 2015
Research article |  | 16 Dec 2015

Post-bubble close-off fractionation of gases in polar firn and ice cores: effects of accumulation rate on permeation through overloading pressure

T. Kobashi, T. Ikeda-Fukazawa, M. Suwa, J. Schwander, T. Kameda, J. Lundin, A. Hori, H. Motoyama, M. Döring, and M. Leuenberger


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Takuro Kobashi on behalf of the Authors (16 Oct 2015)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (19 Oct 2015) by William Thomas Sturges
RR by Anonymous Referee #1 (14 Nov 2015)
ED: Publish subject to technical corrections (27 Nov 2015) by William Thomas Sturges
AR by Takuro Kobashi on behalf of the Authors (01 Dec 2015)  Author's response    Manuscript
Short summary
We find that argon/nitrogen ratios of trapped air in the GISP2 ice core on “gas ages” are significantly negatively correlated with accumulation rate changes over the past 6000 years. Lines of evidence indicate that changes in overloading pressure at bubble closeoff depths induced the gas fractionation in closed bubbles. Further understanding of the fractionation processes may lead to a new proxy for the past temperature and accumulation rate.
Final-revised paper