Sea Ice

Arctic Winter Sea Ice Ties Record Low, NASA, NSIDC Scientists Find

For the second consecutive year, winter sea ice in the Arctic reached a level that matches the lowest peak observed…

Cañon Fiord’s Whirling Waters

During the 2022 summer melt season, sediment plumes and fractured sea ice traced swirling eddies in a branch of the…

Chesapeake Bay Locked in Ice

Nearly 50 years ago, the first Landsat satellite captured the rare sight of Mid-Atlantic waterways frozen over.

Cracking Antarctic Sea Ice

Icebreakers play a critical role in delivering supplies to America's largest research base in Antarctica.

Antarctic Sea Ice Saw Its Third-Lowest Maximum

Sea ice around the southernmost continent hit one of its lowest seasonal highs since the start of the satellite record.

A Giant Iceberg’s Final Drift

After a long, turbulent journey, Antarctic Iceberg A-23A is signaling its demise as it floats in the South Atlantic.

Arctic Sea Ice Ties for 10th-Lowest on Record

Satellite data show that Arctic sea ice likely reached its annual minimum extent on September 10, 2025.

Antarctic Iceberg Downsizes

Iceberg A-23A continued to lose sizable pieces of ice during the 2025 austral winter, but it remained the planet’s largest…

Cloud Streets Over the Laptev Sea

The striking cloud formation developed over Arctic waters north of Siberia in July 2025 as frigid air met warmer open…