Obtain daily sea ice extent values, ranges, and median values for the Arctic or the Antarctic. Analyze monthly-averaged or daily sea ice extent and concentration via interactive maps. Plot monthly ice extent anomalies, map sea ice concentration anomalies, and more.

2025年2月4日 · Shown below are up-to-date satellite observations of the sea ice covers of both the Arctic and the Antarctic, along with comparisons with the historical satellite record of more than 4 decades.

January 11, 2025: The Arctic sea ice has continued to increase this week but at a lesser rate of 3.09% (as opposed to last week’s increase rate of 3.25%), from the level on 01/02/2025 of 12.525 M km 2 to 12.924 M km 2 for this week.

2024年9月24日 · On September 11, Arctic sea ice likely reached its annual minimum extent of 4.28 million square kilometers (1.65 million square miles). The 2024 minimum is the seventh lowest in the nearly 46-year satellite record.

Visualize sea ice extent (area of ocean with at least 15 percent sea ice concentration) data for the Arctic and Antarctic. View and compare sea ice extent data for any year or any combination of years from 1979 to present (including near-real-time daily data).

Sea ice extent. Sea ice extent, defined as the total area covered by ice of at least 15% concentration, is one of the most commonly used indicators of long-term Arctic sea ice conditions. The primary source of extent observations is the 46-year record (starting in 1979) derived from satellite-borne passive microwave sensors.

2024年12月10日 · This map shows average sea ice concentration in September 2024—the month of the summer ice minimum in the Arctic. Parts of the ocean where ice concentration was at least 15% are colored from bright blue to white (100%).

The U.S. National Ice Center (USNIC) has determined the 2024 maximum Arctic sea ice extent occurred in mid-March 2024 with an area of 15.14 million square kilometers.

Sea ice extent in the Arctic at the end of the summer melt season each September from 1979-2023, based on satellite observations. The total extent is the area of all pixels in the satellite image where the ice concentration is at least 15 percent.

The ice cover in the Arctic grows throughout the winter, before peaking in March. Melting picks up pace during the spring as the sun gets stronger, and in September the extent of the ice cover is typically only around one third of its winter maximum.