The Arctic reaches its maximum sea ice in March each year and then starts a six-month melt season. The National Snow and Ice Data Center said the peak measurement taken Saturday was 5.53 million square miles (14.33 million square kilometers) — about 30,000 square miles (80,000 square kilometers) smaller than the lowest previous peak in 2017.

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.

Just 5.53 million square miles of ice had formed as of March 22, the smallest maximum extent since satellite recordkeeping began in the 1970s.