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 22.79 8.80 3.77 1.46 19.84
1968 16.39 6.33 -2.63 -1.01 -13.81
1969 18.91 7.30 -0.11 -0.04 -0.60
1970 21.33 8.23 2.31 0.89 12.13
1971 19.96 7.71 0.94 0.37 4.95
1972 19.76 7.63 0.74 0.29 3.88
1973 21.18 8.18 2.16 0.84 11.36
1974 23.09 8.92 4.07 1.58 21.42
1975 19.90 7.68 0.88 0.34 4.61
1976 22.48 8.68 3.46 1.34 18.17
1977 20.14 7.78 1.12 0.44 5.91
1978 22.09 8.53 3.07 1.19 16.16
1979 22.82 8.81 3.80 1.47 19.99
1980 20.57 7.94 1.55 0.60 8.15
1981 22.48 8.68 3.46 1.34 18.20
1982 18.91 7.30 -0.11 -0.04 -0.56
1983 20.97 8.10 1.95 0.76 10.27
1984 18.51 7.15 -0.51 -0.19 -2.69
1985 22.51 8.69 3.49 1.35 18.36
1986 20.49 7.91 1.47 0.57 7.74
1987 18.57 7.17 -0.45 -0.17 -2.37
1988 18.82 7.27 -0.20 -0.07 -1.03
1989 18.06 6.97 -0.96 -0.37 -5.07
1990 17.04 6.58 -1.98 -0.76 -10.41
1991 18.88 7.29 -0.14 -0.05 -0.74
1992 18.91 7.30 -0.11 -0.04 -0.58
1993 18.62 7.19 -0.40 -0.15 -2.09
1994 18.68 7.21 -0.34 -0.13 -1.79
1995 19.30 7.45 0.28 0.11 1.48
1996 20.74 8.01 1.72 0.67 9.02
1997 19.97 7.71 0.95 0.37 4.99
1998 18.83 7.27 -0.19 -0.07 -1.01
1999 18.92 7.30 -0.10 -0.04 -0.53
2000 19.35 7.47 0.33 0.13 1.71
2001 17.77 6.86 -1.25 -0.48 -6.55
2002 19.49 7.53 0.47 0.19 2.48
2003 20.13 7.77 1.11 0.43 5.84
2004 20.27 7.83 1.25 0.49 6.56
2005 17.43 6.73 -1.59 -0.61 -8.34
2006 18.55 7.16 -0.47 -0.18 -2.49
2007 17.30 6.68 -1.72 -0.66 -9.03
2008 17.46 6.74 -1.56 -0.60 -8.20
2009 18.22 7.04 -0.80 -0.30 -4.19
2010 15.38 5.94 -3.64 -1.40 -19.15
2011 16.80 6.48 -2.22 -0.86 -11.69
2012 16.14 6.23 -2.88 -1.11 -15.16
2013 16.28 6.29 -2.74 -1.05 -14.40
2014 17.01 6.57 -2.01 -0.77 -10.56