NOAA's National Centers for Environmental Information
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. Snow cover extent provided by the Rutgers University Global Snow Laboratory (GSL) is available from 1967–2025 for the North America + Greenland, Northern Hemisphere, Eurasia, and North America. All anomalies are relative to the 1991–2020 average.
Year | Extent million mi² | Anomaly million mi² | Extent million km² | Anomaly million km² | Anomaly % Difference |
|---|---|---|---|---|---|
| 2025 | 8.71 | -0.85 | 22.55 | -2.21 | -0.09 |
| 2024 | 8.76 | -0.80 | 22.70 | -2.06 | -0.08 |
| 2023 | 8.53 | -1.03 | 22.10 | -2.66 | -0.11 |
| 2022 | 8.92 | -0.64 | 23.10 | -1.66 | -0.07 |
| 2021 | 9.39 | -0.17 | 24.31 | -0.45 | -0.02 |
| 2020 | 9.21 | -0.35 | 23.86 | -0.90 | -0.04 |
| 2019 | 8.82 | -0.74 | 22.84 | -1.92 | -0.08 |
| 2018 | 9.14 | -0.42 | 23.67 | -1.09 | -0.04 |
| 2017 | 8.95 | -0.61 | 23.17 | -1.59 | -0.06 |
| 2016 | 9.13 | -0.43 | 23.65 | -1.11 | -0.04 |
| 2015 | 9.79 | 0.23 | 25.35 | 0.59 | 0.02 |
| 2014 | 9.93 | 0.37 | 25.72 | 0.96 | 0.04 |
| 2013 | 9.85 | 0.29 | 25.51 | 0.75 | 0.03 |
| 2012 | 9.35 | -0.21 | 24.22 | -0.54 | -0.02 |
| 2011 | 9.30 | -0.26 | 24.08 | -0.68 | -0.03 |
| 2010 | 9.65 | 0.09 | 25.00 | 0.24 | 0.01 |
| 2009 | 9.74 | 0.18 | 25.23 | 0.47 | 0.02 |
| 2008 | 9.76 | 0.20 | 25.27 | 0.51 | 0.02 |
| 2007 | 9.46 | -0.10 | 24.51 | -0.25 | -0.01 |
| 2006 | 9.37 | -0.19 | 24.26 | -0.50 | -0.02 |
| 2005 | 9.44 | -0.12 | 24.45 | -0.31 | -0.01 |
| 2004 | 9.74 | 0.18 | 25.23 | 0.47 | 0.02 |
| 2003 | 9.88 | 0.32 | 25.59 | 0.83 | 0.03 |
| 2002 | 9.25 | -0.31 | 23.96 | -0.80 | -0.03 |
| 2001 | 9.61 | 0.05 | 24.88 | 0.12 | 0.00 |
| 2000 | 9.87 | 0.31 | 25.56 | 0.80 | 0.03 |
| 1999 | 9.82 | 0.26 | 25.43 | 0.67 | 0.03 |
| 1998 | 9.66 | 0.10 | 25.02 | 0.26 | 0.01 |
| 1997 | 9.60 | 0.04 | 24.86 | 0.10 | 0.00 |
| 1996 | 10.02 | 0.46 | 25.95 | 1.19 | 0.05 |
| 1995 | 9.55 | -0.01 | 24.73 | -0.03 | -0.00 |
| 1994 | 9.88 | 0.32 | 25.58 | 0.82 | 0.03 |
| 1993 | 9.66 | 0.10 | 25.02 | 0.26 | 0.01 |
| 1992 | 9.64 | 0.08 | 24.96 | 0.20 | 0.01 |
| 1991 | 9.72 | 0.16 | 25.18 | 0.42 | 0.02 |
| 1990 | 9.54 | -0.02 | 24.72 | -0.04 | -0.00 |
| 1989 | 9.97 | 0.41 | 25.82 | 1.06 | 0.04 |
| 1988 | 9.66 | 0.10 | 25.03 | 0.27 | 0.01 |
| 1987 | 9.72 | 0.16 | 25.17 | 0.41 | 0.02 |
| 1986 | 9.53 | -0.03 | 24.67 | -0.09 | -0.00 |
| 1985 | 9.90 | 0.34 | 25.65 | 0.89 | 0.04 |
| 1984 | 9.80 | 0.24 | 25.38 | 0.62 | 0.03 |
| 1983 | 9.63 | 0.07 | 24.94 | 0.18 | 0.01 |
| 1982 | 10.00 | 0.44 | 25.90 | 1.14 | 0.05 |
| 1981 | 9.86 | 0.30 | 25.54 | 0.78 | 0.03 |
| 1980 | 9.53 | -0.03 | 24.69 | -0.07 | -0.00 |
| 1979 | 10.32 | 0.76 | 26.72 | 1.96 | 0.08 |
