Arctic sea ice extent

Arctic sea ice extent. Data available from NSIDC (Fetterer et al., 2025).

Arctic sea ice extent plotted by year.
Anomalies in Arctic sea ice extent.
Anomalies in Arctic sea ice extent plotted by year.
Anomalies in Arctic sea ice extent, normalised by 1981-2010 climatology, plotted by year.
Climatology of Arctic sea ice extent.

References

2025

  1. Sea Ice Index, Version 4
    Florence Fetterer, Ken Knowles, W. N. Meier, and 3 more authors
    2025