Our analyses focus primarily on sea ice extent, which is a measurement of the area of ocean where there is at least some sea ice. In the Arctic, the annual minimum sea ice extent occurs …

Sea ice extent Sea ice extent, derived from sea ice concentration fields and defined as the total area covered by ice of at least 15% concentration, is an iconic indicator of long-term Arctic sea …

Jun 25, 2025 · Arctic sea ice has declined in all months of the year, with the greatest rate of decline occurring in September, the typical month of the Arctic summer minimum.

Sep 25, 2025 · This graph shows the area extent of the Arctic sea ice each September since satellite observations started in 1979. The monthly value shown is the average of daily …

Aug 19, 2025 · Another sea ice extent dataset that is available shows Sea Ice Extent from 1987-2013. In the Arctic, the maximum coverage usually occurs in March and the minimum …

Feb 25, 2025 · In September the extent was between 17.05 and 17.55million km 2. This was the 2nd lowest extent on record. Data sets used were: NSIDC and OSI SAF v2.2. Paragraph …

This visualization tracks Arctic Sea Ice Extent in September since 1979. Sea ice extent refers to the total area of the ocean covered by at least 15% sea ice concentration.

Sea ice extent provided by the National Snow and Ice Data Center (NSIDC) is available from 1979–2025 for the Globe, Northern Hemisphere, and Southern Hemisphere.

Sea ice grows throughout the fall and winter and melts throughout the spring and summer. In the Arctic Ocean, sea ice extent—the area of ocean with at least 15 percent sea ice …

Sep 17, 2025 · On September 10, Arctic sea ice likely reached its annual minimum extent of 4.60 million square kilometers (1.78 million square miles). The 2025 minimum shares the tenth …