​Global Sea Ice Cover Reaches Record Low

A new analysis of US National Snow and Ice Data Center (NSIDC) data revealed that global sea ice cover dropped to 15.76 million sq km in February 2025, setting a new record low. The previous record was 15.93 million sq km in early 2023.

What is sea ice?

  • Sea ice refers to free-floating ice in the polar regions, which expands in winter and melts in summer.
  • Unlike glaciers, ice sheets, icebergs, and ice shelves—which form on land—sea ice forms and floats on the ocean’s surface.
  • The Arctic is surrounded by land, which helps retain ice, while Antarctic sea ice is more mobile ....
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Ecology & Environment