2025年2月3日 · 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.

2 天之前 · 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.

14 小时之前 · Over the 5 days to 13 February, the combined extent of Arctic and Antarctic sea-ice was 15.76 million sq km (6.08 million sq miles), according to BBC analysis of data from the US National Snow and ...

2025年2月4日 · Arctic daily sea ice extent continued to hover near record daily lows in January, with the ice edge well northward of its long-term average position in most areas. In contrast to the cold conditions dominating the contiguous United States, much of the Arctic experienced above-average January temperatures. In the Antarctic, daily sea ice extent fell below the long-term …

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.

2024年9月24日 · This year, Arctic sea ice shrank to a minimal extent of 1.65 million square miles (4.28 million square kilometers). That’s about 750,000 square miles (1.94 million square kilometers) below the 1981 to 2010 end-of-summer average of 2.4 million square miles (6.22 million square kilometers).

2024年9月25日 · This summer, Arctic sea ice decreased to a its minimum extent on September 11, 2024. According to the National Snow and Ice Data Center this is the 7th lowest in the satellite record). The decline continues the long-term trend of shrinking ice cover in the Arctic Ocean. Each year, Arctic sea ice melts and refreezes with seasonal changes.

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.

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%).