Arctic sea ice had its weakest winter buildup since record-keeping began 47 years ago. Scientists say it's a symptom of climate change that will have repercussions in weather globally.

The meltdown extends beyond the Arctic. Antarctica recently flirted with a record low in its own annual sea ice minimum – this while the Arctic hits an unprecedented winter low. As a result, Meier notes that global sea ice coverage in February dropped to a record minimum, signifying a broader, planet-wide shift.

Arctic sea ice reached a record low in March 2025, marking the lowest extent in the 47-year satellite record. The shrinking sea ice, attributed to rising global temperatures from burning fossil ...