National Oceanic and Atmospheric Administration (NOAA) in the Arctic
December 2025
Twenty years of tracking rapid Arctic warming and change
Now in its 20th year, the Arctic Report Card (ARC) 2025 provides a clear view of a region warming far faster than the rest of the planet. Along with reports on the state of the Arctic’s atmosphere, oceans, cryosphere, and tundra, this year’s report highlights major transformations underway—atlantification bringing warmer, saltier waters northward, boreal species expanding northward into Arctic ecosystems, and “rivers rusting” as thawing permafrost mobilizes iron and other metals. Across these changing landscapes, sustained observations and strong research partnerships, including those led by communities and Indigenous organizations, remain essential for understanding and adaptation.
