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 12.09 4.67 2.37 0.92 24.41
1968 8.39 3.24 -1.33 -0.51 -13.72
1969 10.21 3.94 0.49 0.19 5.05
1970 11.59 4.48 1.87 0.73 19.27
1971 11.00 4.25 1.28 0.50 13.20
1972 9.95 3.84 0.23 0.09 2.32
1973 11.63 4.49 1.91 0.74 19.70
1974 11.61 4.48 1.89 0.73 19.49
1975 9.76 3.77 0.04 0.02 0.41
1976 12.51 4.83 2.79 1.08 28.71
1977 10.52 4.06 0.80 0.31 8.20
1978 11.47 4.43 1.75 0.68 18.01
1979 12.34 4.77 2.62 1.02 26.98
1980 11.69 4.51 1.97 0.76 20.28
1981 12.38 4.78 2.66 1.03 27.41
1982 9.07 3.50 -0.65 -0.25 -6.66
1983 10.94 4.22 1.22 0.47 12.50
1984 9.55 3.69 -0.17 -0.06 -1.80
1985 11.31 4.37 1.59 0.62 16.37
1986 10.69 4.13 0.97 0.38 10.02
1987 10.01 3.86 0.29 0.11 2.94
1988 9.77 3.77 0.05 0.02 0.54
1989 9.11 3.52 -0.61 -0.23 -6.29
1990 8.09 3.12 -1.63 -0.63 -16.75
1991 10.05 3.88 0.33 0.13 3.42
1992 9.14 3.53 -0.58 -0.22 -5.96
1993 9.80 3.78 0.08 0.03 0.83
1994 9.96 3.85 0.24 0.10 2.51
1995 10.28 3.97 0.56 0.22 5.72
1996 10.58 4.08 0.86 0.33 8.84
1997 9.06 3.50 -0.66 -0.25 -6.77
1998 10.56 4.08 0.84 0.33 8.66
1999 9.67 3.73 -0.05 -0.02 -0.49
2000 9.61 3.71 -0.11 -0.04 -1.13
2001 8.54 3.30 -1.18 -0.45 -12.11
2002 9.49 3.66 -0.23 -0.09 -2.37
2003 10.76 4.15 1.04 0.40 10.68
2004 10.43 4.03 0.71 0.28 7.25
2005 8.94 3.45 -0.78 -0.30 -8.01
2006 10.13 3.91 0.41 0.16 4.23
2007 8.74 3.37 -0.98 -0.38 -10.10
2008 8.59 3.32 -1.13 -0.43 -11.67
2009 8.86 3.42 -0.86 -0.33 -8.86
2010 7.58 2.93 -2.14 -0.82 -22.02
2011 7.70 2.97 -2.02 -0.78 -20.76
2012 7.55 2.91 -2.17 -0.84 -22.35
2013 7.26 2.80 -2.46 -0.95 -25.29