The Arctic reached its lowest sea ice extent for the year last week, and a new timelapse from NASA shows the polar melting from March to September.

Earlier this year on March 21, the Arctic reached its maximum sea ice extent of 5.76 million square miles. Since then, the north pole lost 3.82 million square miles of sea ice before bottoming out for the year at 1.94 million square miles on September 17. This is the sixth-lowest sea ice extent on record, since satellites began measuring it in 1979.

The video is an animation of daily Arctic sea ice extent this summer, as seen from satellites.

This year’s minimum sea ice extent was 622,000 square miles above the record minimum extent, which occurred in 2012. That year, both the Northern Sea Route and the Northwest Passage were open to shipping.

This year, the Northern Sea Route (also referred to as the Northeast Passage), which tracks through the Arctic along the Russian Arctic coast, has been open to shipping for the past month or so.  On the other side of the Arctic, the Northwest Passage did not open this year, and will remain closed through the rest of 2014.

Meanwhile, in the Antarctic, sea ice has remained at record high daily levels for most of the year. It’s still too soon to say what the maximum sea ice extent will be this year in the southern hemisphere.