July 2, 2025: The Arctic sea ice has experienced a greater decrease for this week (of only 6 days) of 7.34% (last week’s decrease rate was 5.15%), from the level on 06/26/2025 of 9.692 M km² to 8.981 M km² for this week.  The sea ice extent for 2025 to date is just barely edged out of first place for the lowest sea ice extent for this time of year. On 7/02/2021 the sea ice extent was slightly lower at 8.812 M km² .  We rely on the microwave satellite data collected as part of the Defense Meteorological Satellite Program (DMSP) for these and many other datasets.

The negative sea ice anomaly this week was higher than the anomaly of -0.8984 M km² on 06/26/2025 to a greater negative anomaly of -1.080 M km² on 07/02/2025, and so more anomalously negative for this time of year.