an effect that is also visible in model and satellite data.” The sea ice in the Arctic reaches its maximum winter extent in February and March each year. As temperatures rise, it melts until the ...

The winter growth period for sea ice in the Arctic Ocean is now over, with levels at a record low. The winter ice extent on ...

The Arctic’s winter ice extent reached its lowest recorded level in March since satellite monitoring began in 1979. On March 21, 2025, the sea ice cover measured 14.45 million square kilometres ...

"This record low is yet another indicator of how Arctic sea ice has fundamentally changed from earlier decades," said snow and ice data center scientist Walt Meier. He said sea ice extent is ...