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Freezing at the grounding line in East Antarctica: possible implications for sediment export efficiency

  • R. Souchez (a1), A. Khazendar (a1), D. Ronveaux (a2) and J.-L. Tison (a1)

Abstract

A study of the δD and δ18O composition of ice formed at or near the grounding line was undertaken in Terra Nova Bay, East Antarctica. The results indicate that a double-diffusion mechanism is responsible for freezing at the grounding line in areas sheltered from the sub-ice cavity circulation. Freezing at the grounding line is unlikely to be prevalent today, but the situation may have been different in the past when the ice reached the outer limit of the continental shelf and there was no sub-ice cavity. The implications for sediment export in the polar oceans are explained.

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References

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Freezing at the grounding line in East Antarctica: possible implications for sediment export efficiency

  • R. Souchez (a1), A. Khazendar (a1), D. Ronveaux (a2) and J.-L. Tison (a1)

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