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: Rutgers University Global Snow Laboratory (GSL)

Download: xml csv json
Date Extent
million km²
Extent
million mi²
Anomaly
million km²
Anomaly
million mi²
Anomaly
% Difference
1967 9.49 3.67 -0.01 -0.00 -0.08
1968 12.34 4.77 2.84 1.10 29.95
1970 13.16 5.08 3.66 1.41 38.51
1971 12.39 4.78 2.89 1.11 30.37
1972 12.34 4.76 2.84 1.09 29.85
1973 10.18 3.93 0.68 0.26 7.11
1974 9.55 3.69 0.05 0.02 0.54
1975 8.32 3.21 -1.18 -0.46 -12.40
1976 17.22 6.65 7.72 2.98 81.24
1977 11.58 4.47 2.08 0.80 21.88
1978 10.08 3.89 0.58 0.22 6.13
1979 8.32 3.21 -1.18 -0.46 -12.46
1980 7.15 2.76 -2.35 -0.91 -24.73
1981 8.58 3.31 -0.92 -0.36 -9.71
1982 10.02 3.87 0.52 0.20 5.48
1983 9.10 3.51 -0.40 -0.16 -4.22
1984 9.47 3.66 -0.03 -0.01 -0.31
1985 9.48 3.66 -0.02 -0.01 -0.16
1986 8.70 3.36 -0.80 -0.31 -8.39
1987 6.96 2.69 -2.54 -0.98 -26.72
1988 5.58 2.15 -3.92 -1.52 -41.28
1989 9.05 3.50 -0.45 -0.17 -4.71
1990 7.58 2.93 -1.92 -0.74 -20.21
1991 7.23 2.79 -2.27 -0.88 -23.86
1992 8.40 3.24 -1.10 -0.43 -11.55
1993 10.41 4.02 0.91 0.35 9.57
1994 7.30 2.82 -2.20 -0.85 -23.11
1995 9.68 3.74 0.18 0.07 1.92
1996 10.03 3.87 0.53 0.20 5.57
1997 9.10 3.51 -0.40 -0.16 -4.25
1998 11.71 4.52 2.21 0.85 23.31
1999 9.76 3.77 0.26 0.10 2.79
2000 10.24 3.95 0.74 0.28 7.82
2001 11.04 4.26 1.54 0.59 16.18
2002 13.47 5.20 3.97 1.53 41.82
2003 10.43 4.03 0.93 0.36 9.83
2004 10.95 4.23 1.45 0.56 15.31
2005 9.42 3.64 -0.08 -0.03 -0.81
2006 11.79 4.55 2.29 0.88 24.06
2007 8.34 3.22 -1.16 -0.45 -12.25
2008 8.70 3.36 -0.80 -0.31 -8.44
2009 11.55 4.46 2.05 0.79 21.60
2010 10.81 4.18 1.31 0.51 13.83
2011 9.47 3.66 -0.03 -0.01 -0.34
2012 11.36 4.39 1.86 0.72 19.60
2013 12.85 4.96 3.35 1.29 35.29
2014 14.14 5.46 4.64 1.79 48.84