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 Antarctic Dust Reveals Signs of a Diminished Ross Ice Shelf
Abatify Summary
Nature & Climate Perspective
**Evidence of historic Ross Ice Shelf retreat signals heightened vulnerability of global marine ecosystems and coastal carbon sinks to rapid, irreversible sea-level rise. **
- Accelerated ice shelf collapse threatens unique polar marine biodiversity and alters critical Southern Ocean krill habitats that support global food webs.
- Vast freshwater discharge disrupts global ocean conveyor belts, potentially degrading the Southern Ocean's capacity for long-term ocean carbon sequestration.
- Inundation risks from rising sea levels directly threaten coastal Blue Carbon ecosystems, reducing their capacity to store carbon and protect coastlines from erosion.
Market & Policy Outlook
**The elevated threat of ice sheet instability introduces severe systemic risks for carbon credit permanence, challenging ICVCM compliance frameworks. **
- Escalating physical climate risks will force a reassessment of baseline assumptions within Article 6.2 and Article 6.4 mechanisms, shifting regulatory focus to high-integrity permanence standards.
- Voluntary carbon market dynamics will likely see increased pricing premiums for technical removals as nature-based LULUCF credits face heightened reversal risks under ICVCM Core Carbon Principles (CCPs).
- Accelerating climate tipping points will prompt bodies like SBTi to tighten corporate Scope 3 compliance, forcing companies to move from standard avoidance offsets toward robust, long-term geological storage.
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