Articles | Volume 13, issue 12
Clim. Past, 13, 1815–1830, 2017
https://doi.org/10.5194/cp-13-1815-2017
Clim. Past, 13, 1815–1830, 2017
https://doi.org/10.5194/cp-13-1815-2017

Research article 13 Dec 2017

Research article | 13 Dec 2017

Analytical constraints on layered gas trapping and smoothing of atmospheric variability in ice under low-accumulation conditions

Kévin Fourteau et al.

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Revised manuscript under review for CP
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Cited articles

Ahn, J., Brook, E. J., and Buizert, C.: Response of atmospheric CO2 to the abrupt cooling event 8200 years ago, Geophys. Res. Lett., 41, 604–609, https://doi.org/10.1002/2013gl058177, 2014.
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Arnaud, L., Barnola, J.-M., and Duval, P.: Physical modeling of the densification of snow/firn and ice in the upper part of polar ice sheets, Physics of Ice Core Records, 285–305, http://hdl.handle.net/2115/32472 (last access: 28 November 2017), 2000.
Bender, M. L., Sowers, T., Barnola, J.-M., and Chappellaz, J.: Changes in the O2 ∕ N2 ratio of the atmosphere during recent decades reflected in the composition of air in the firn at Vostok Station, Antarctica, Geophys. Res. Lett., 21, 189–192, https://doi.org/10.1029/93gl03548, 1994.
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Short summary
We measured methane concentrations from a polar ice core to quantify the differences between the ice record and the past true atmospheric conditions. Two effects were investigated by combining data analysis and modeling: the stratification of polar snow before gas enclosure driving chronological hiatuses in the record and the gradual formation of bubbles in the ice attenuating fast atmospheric variations. This study will contribute to improving future climatic interpretations from ice archives.