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 25.49 9.84 1.31 0.50 5.42
1980 23.50 9.07 -0.68 -0.27 -2.81
1981 24.01 9.27 -0.17 -0.07 -0.70
1982 25.33 9.78 1.15 0.44 4.76
1983 23.63 9.12 -0.55 -0.22 -2.27
1984 24.06 9.29 -0.12 -0.05 -0.50
1985 25.09 9.69 0.91 0.35 3.76
1986 23.30 9.00 -0.88 -0.34 -3.64
1987 24.09 9.30 -0.09 -0.04 -0.37
1988 24.01 9.27 -0.17 -0.07 -0.70
1989 24.15 9.32 -0.03 -0.02 -0.12
1990 23.64 9.13 -0.54 -0.21 -2.23
1991 24.59 9.49 0.41 0.15 1.70
1992 23.62 9.12 -0.56 -0.22 -2.32
1993 24.13 9.32 -0.05 -0.02 -0.21
1994 24.68 9.53 0.50 0.19 2.07
1995 24.15 9.32 -0.03 -0.02 -0.12
1996 24.56 9.48 0.38 0.14 1.57
1997 24.16 9.33 -0.02 -0.01 -0.08
1998 24.72 9.54 0.54 0.20 2.23
1999 24.75 9.56 0.57 0.22 2.36
2000 24.84 9.59 0.66 0.25 2.73
2001 24.68 9.53 0.50 0.19 2.07
2002 23.10 8.92 -1.08 -0.42 -4.47
2003 24.38 9.41 0.20 0.07 0.83
2004 23.53 9.08 -0.65 -0.26 -2.69
2005 23.96 9.25 -0.22 -0.09 -0.91
2006 22.80 8.80 -1.38 -0.54 -5.71
2007 23.23 8.97 -0.95 -0.37 -3.93
2008 24.70 9.54 0.52 0.20 2.15
2009 24.83 9.59 0.65 0.25 2.69
2010 24.62 9.51 0.44 0.17 1.82
2011 23.66 9.14 -0.52 -0.20 -2.15
2012 24.09 9.30 -0.09 -0.04 -0.37
2013 24.58 9.49 0.40 0.15 1.65
2014 24.81 9.58 0.63 0.24 2.61