A ‘triple whammy’ of chaos has triggered a downward spiral in Antarctica, scientists discover
Yahoo • • general
Key Points:
- Antarctic sea ice has been declining sharply since 2015, reaching record lows in 2022 and 2023, with ice loss equivalent to an area larger than Greenland compared to average levels.
- New research attributes this decline to a "triple whammy" of climate-driven processes: intensifying westerly winds, warming ocean waters rising from the depths, and a feedback loop where warmer, saltier surface water prevents ice formation.
- The study highlights regional differences, with East Antarctica's ice loss driven mainly by ocean heat and West Antarctica's by atmospheric warming, including heat-trapping clouds.
- Loss of sea ice exposes coastal ice sheets to warmer waters and waves, accelerates global warming by reducing the Earth's reflectivity, and threatens to destabilize ocean currents that regulate heat and carbon storage.
- Scientists warn that if low sea ice levels persist beyond 2030, Antarctica could shift from stabilizing the global climate to becoming a significant driver of global warming.
