Antarctica’s Ross Ice Shelf and the West Antarctic Ice Sheet may have been far smaller during one of Earth’s most recent warm periods, according to a new study.
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Ancient Dust Points To Retreat of West Antarctic Ice Sheet During Last Warm Period – State of the Planet
Abatify Summary
Nature & Climate Perspective
**The historical vulnerability of the West Antarctic Ice Sheet indicates a high risk of rapid sea-level rise that could submerge and destroy critical coastal Blue Carbon ecosystems globally. **
- Accelerated ice shelf retreat triggers severe positive feedback loops, reducing global albedo and exacerbating thermal stress on terrestrial LULUCF carbon sinks.
- Massive freshwater influxes from ice melt threaten to disrupt marine biological pumps, reducing the Southern Ocean's capacity for long-term carbon sequestration.
- The potential collapse of Antarctic ice shelves threatens coastal biodiversity and destabilizes low-lying ecosystems that currently serve as essential natural carbon buffers.
Market & Policy Outlook
**Evidence of rapid ice sheet collapse reinforces the need for stricter ICVCM permanence definitions and drives urgent revisions to corporate SBTi decarbonization timelines. **
- The physical risk of sea-level rise forces a reassessment of risk-buffer pools under the ICVCM Core Carbon Principles (CCPs), as nature-based projects face heightened permanence risks.
- Increased climate volatility and sea-level projections will likely accelerate bilateral negotiations under Article 6.2, driving higher premium pricing for high-integrity ITMOs.
- Financial institutions and corporations face rising pressure to disclose long-term physical risks within their Scope 3 supply chains, shifting capital toward robust transition assets.
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