Overview
- Peer-reviewed research in Frontiers in Environmental Science outlines divergent futures for the Antarctic Peninsula, with low-emissions pathways preserving resilience and higher emissions driving sustained, effectively irreversible ice loss.
- Under a high-emissions scenario (SSP5-8.5), major ice shelves such as Larsen C and Wilkins are projected to collapse by 2100, accelerating glacier flow and adding about 7.5 millimeters to global sea level by century’s end.
- Longer-term projections estimate the Peninsula’s contribution could exceed 116 millimeters by 2300 under high emissions, underscoring multi-century commitments once collapse processes begin.
- The study highlights intensifying drivers of melt, including more days above freezing, increased rainfall and atmospheric rivers, and warmer subsurface ocean waters that erode ice shelves from below.
- A Nature Climate Change paper maps temperature thresholds across Antarctic basins and reports that several West Antarctic sectors show hysteresis behavior and may already be committed to ongoing retreat even if temperatures later stabilize.