As the Northern Hemisphere swelters under a record-breaking summer heat wave, much further south, in the depths of winter, another terrifying climate record is being broken.
Every year, Antarctic sea ice shrinks to its lowest levels towards the end of February, during the continent’s summer. The sea ice then builds back up over the winter. But this year scientists have observed something different. The sea ice has not returned to anywhere near expected levels. In fact it is at the lowest levels for this time of year since records began 45 years ago. The ice is around 1.
“Warmer ocean temperatures north of the Antarctic Ocean boundary mixing into the water that’s typically somewhat isolated from the rest of the world’s oceans is also part of this idea as to how to explain this,” Scambos said. In late February of this year, Antarctic sea ice reached its lowest extent since records began, at 691,000 square miles. This winter’s unprecedented occurrence may indicate a long-term change for the isolated continent, Scambos said.
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