Science

Seafloor clay reveals past dramatic ice loss in West Antarctica

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Briefings

Recent research indicates West Antarctica's Thwaites Glacier and other vulnerable ice streams repeatedly collapsed and retreated inland during natural warm periods over the last 800,000 years. This finding suggests the region's ice loss mechanisms have been more complex than previously understood, potentially affecting future projections of sea-level rise.

Key points

• West Antarctica's Thwaites Glacier and other vulnerable ice streams repeatedly collapsed and retreated far inland during natural warm periods of the last 800,000 years.
• The evidence represents the best available data showing this pattern, though the exact mechanisms driving these retreats remain partially unexplained.

Context

This research provides critical insights into the long-term stability of West Antarctic ice sheets, which are essential for accurate global sea-level rise projections.

Limitations

The evidence covers the last 800,000 years and relies on geological records; specific causes for the ice retreats remain partially unexplained.

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