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Climate of the Past An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/cpd-5-2239-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/cpd-5-2239-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  08 Oct 2009

08 Oct 2009

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This preprint was under review for the journal CP. A revision for further review has not been submitted.

Post-depositional changes in snow isotope content: preliminary results of laboratory experiments

A. A. Ekaykin1,2, T. Hondoh1, V. Y. Lipenkov2, and A. Miyamoto1 A. A. Ekaykin et al.
  • 1Institute of Low Temperature Sciences, Hokkaido University, 060-0819 Sapporo, Japan
  • 2Arctic and Antarctic Research Institute, 199397 St. Petersburg, Russia

Abstract. Isotopic content of the snow and firn thickness is assumed to be altered significantly due to the post-depositional (PD) mass- and isotope exchange with the atmospheric water vapor. If so, these effects should be accounted for in the ice core-based isotope-temperature paleo-reconstructions. In order to study the intensity of the PD processes we set up a series of laboratory experiments. In this paper we describe in detail the experimental technique and briefly overview preliminary results. It is shown that the PD modifications in the upper layer of snow thickness are noticeably strong even under such a low temperature as −35°C (the value typical for the Central Antarctic summer). It is demonstrated that the PD isotopic changes in snow can be approximated as a linear function of the relative mass loss due to snow sublimation. Possible applications for improving the isotope-temperature paleo-reconstructions are shortly discussed.

A. A. Ekaykin et al.

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A. A. Ekaykin et al.

A. A. Ekaykin et al.

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