Sea Ice and Snow Cover Extent

Sea ice extent provided by the National Snow and Ice Data Center (NSIDC) is available from 1979–2014 for the Northern Hemisphere, Southern Hemisphere, and Globe. Snow cover extent provided by the Rutgers University Global Snow Laboratory (GSL) is available from 1967–2014 for the North America + Greenland, Northern Hemisphere, Eurasia, and North America. All anomalies are relative to the 1981–2010 average.

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Source: National Snow and Ice Data Center (NSIDC)

Download: xml csv json
Date Extent
million km²
Extent
million mi²
Anomaly
million km²
Anomaly
million mi²
Anomaly
% Difference
1979 11.43 4.41 0.64 0.24 5.93
1980 9.46 3.65 -1.33 -0.52 -12.33
1981 10.11 3.90 -0.68 -0.27 -6.30
1982 11.16 4.31 0.37 0.14 3.43
1983 10.09 3.90 -0.70 -0.27 -6.49
1984 10.38 4.01 -0.41 -0.16 -3.80
1985 10.86 4.19 0.07 0.02 0.65
1986 9.78 3.78 -1.01 -0.39 -9.36
1987 10.28 3.97 -0.51 -0.20 -4.73
1988 10.32 3.98 -0.47 -0.19 -4.36
1989 11.17 4.31 0.38 0.14 3.52
1990 10.34 3.99 -0.45 -0.18 -4.17
1991 11.08 4.28 0.29 0.11 2.69
1992 10.37 4.00 -0.42 -0.17 -3.89
1993 10.59 4.09 -0.20 -0.08 -1.85
1994 10.95 4.23 0.16 0.06 1.48
1995 11.11 4.29 0.32 0.12 2.97
1996 11.50 4.44 0.71 0.27 6.58
1997 10.84 4.19 0.05 0.02 0.46
1998 10.92 4.22 0.13 0.05 1.20
1999 10.89 4.20 0.10 0.03 0.93
2000 11.66 4.50 0.87 0.33 8.06
2001 10.96 4.23 0.17 0.06 1.58
2002 9.98 3.85 -0.81 -0.32 -7.51
2003 11.38 4.39 0.59 0.22 5.47
2004 10.95 4.23 0.16 0.06 1.48
2005 10.97 4.24 0.18 0.07 1.67
2006 10.18 3.93 -0.61 -0.24 -5.65
2007 10.34 3.99 -0.45 -0.18 -4.17
2008 11.51 4.44 0.72 0.27 6.67
2009 11.43 4.41 0.64 0.24 5.93
2010 11.51 4.44 0.72 0.27 6.67
2011 10.85 4.19 0.06 0.02 0.56
2012 10.97 4.24 0.18 0.07 1.67
2013 11.47 4.43 0.68 0.26 6.30