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The Cryosphere An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/tc-2017-71
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
23 May 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal The Cryosphere (TC).
Stable accumulation patterns around Dome C, East Antarctica, over the last glacial cycle
Marie G.~P. Cavitte1,2, Frédéric Parrenin3, Catherine Ritz3, Duncan A. Young1, Donald D. Blankenship1,2, Massimo Frezzotti4, and Jason L. Roberts5,6 1Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, Austin, Texas, USA
2Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, Texas, USA
3Univ. Grenoble Alpes, CNRS, IRD, IGE, F-38000 Grenoble, France
4ENEA, Agenzia Nazionale per le nuove tecnologie, l’energia e lo sviluppo sostenibile, Rome, Italy
5Australian Antarctic Division, Kingston, Tasmania 7050, Australia
6Antarctic Climate & Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, Tasmania 7001, Australia
Abstract. We reconstruct the pattern of surface accumulation in the region around Dome C, East Antarctica, through the last glacial cycle. We use a set of internal isochrones interpreted from various ice-penetrating radar surveys and a 1D pseudo-steady ice flow model to invert for both time-averaged accumulation rates and paleoaccumulation rates between isochrone pairs. We observe that the surface accumulation pattern is stable through the last 128 kyrs, both the large-scale (100s km) gradients which reflect current modeled and observed precipitation gradients in the region, as well as the small-scale (10s km) accumulation variations linked to snow redistribution at the surface due to changes in its slope and curvature in the prevailing wind direction. This suggests a stable position of the dome throughout the last glacial cycle.

Citation: Cavitte, M. G. ~P., Parrenin, F., Ritz, C., Young, D. A., Blankenship, D. D., Frezzotti, M., and Roberts, J. L.: Stable accumulation patterns around Dome C, East Antarctica, over the last glacial cycle, The Cryosphere Discuss., https://doi.org/10.5194/tc-2017-71, in review, 2017.
Marie G.~P. Cavitte et al.
Marie G.~P. Cavitte et al.
Marie G.~P. Cavitte et al.

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We reconstruct the pattern of surface accumulation in the region around Dome C, East Antarctica, through the last glacial cycle. We use internal isochrones interpreted from ice-penetrating radar surveys and a 1D pseudo-steady ice flow model to invert for both time-averaged accumulation rates and paleoaccumulation rates. We observer that surface accumulation patterns are stable through the last 128 kyrs, this suggests a stable position of the dome throughout the last glacial cycle.
We reconstruct the pattern of surface accumulation in the region around Dome C,...
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