Antarctic sea ice expansion (1979-2014)
Antarctic sea ice expanded for decades even as the planet warmed, a counterintuitive regional trend driven by winds and ocean circulation rather than a sign global warming had reversed.
Led some to question whether Antarctic ice was responding to warming at all.
The trend collapsed in 2016-17 to record-low sea ice, confirming it was regional variability, not a lasting reversal.
Like the recent ice mass gain, a regional anomaly that complicates the simple narrative of Antarctic decline without reversing its long-term trajectory.
