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 18.81 7.26 1.64 0.63 9.57
1968 15.84 6.12 -1.33 -0.51 -7.72
1969 17.32 6.69 0.15 0.06 0.90
1970 19.40 7.49 2.23 0.86 13.01
1971 17.64 6.81 0.47 0.18 2.72
1972 17.86 6.90 0.69 0.27 4.01
1973 18.00 6.95 0.83 0.32 4.82
1974 16.73 6.46 -0.44 -0.17 -2.54
1975 16.60 6.41 -0.57 -0.22 -3.33
1976 18.07 6.98 0.90 0.35 5.25
1977 17.91 6.91 0.74 0.28 4.28
1978 16.56 6.39 -0.61 -0.24 -3.57
1979 19.82 7.65 2.65 1.02 15.43
1980 20.29 7.84 3.12 1.21 18.19
1981 20.69 7.99 3.52 1.36 20.48
1982 16.95 6.54 -0.22 -0.09 -1.29
1983 16.50 6.37 -0.67 -0.26 -3.89
1984 18.17 7.02 1.00 0.39 5.83
1985 18.72 7.23 1.55 0.60 9.01
1986 17.34 6.69 0.17 0.06 0.98
1987 19.15 7.39 1.98 0.76 11.51
1988 16.58 6.40 -0.59 -0.23 -3.44
1989 16.58 6.40 -0.59 -0.23 -3.46
1990 15.44 5.96 -1.73 -0.67 -10.10
1991 16.18 6.25 -0.99 -0.38 -5.79
1992 16.04 6.19 -1.13 -0.44 -6.59
1993 16.08 6.21 -1.09 -0.42 -6.32
1994 16.80 6.49 -0.37 -0.14 -2.17
1995 18.54 7.16 1.37 0.53 7.95
1996 19.25 7.43 2.08 0.80 12.10
1997 16.36 6.31 -0.81 -0.32 -4.74
1998 18.65 7.20 1.48 0.57 8.60
1999 16.98 6.56 -0.19 -0.07 -1.12
2000 16.87 6.51 -0.30 -0.12 -1.77
2001 16.52 6.38 -0.65 -0.25 -3.76
2002 16.91 6.53 -0.26 -0.10 -1.49
2003 18.00 6.95 0.83 0.32 4.81
2004 16.92 6.53 -0.25 -0.10 -1.43
2005 17.29 6.68 0.12 0.05 0.69
2006 17.90 6.91 0.73 0.28 4.28
2007 15.39 5.94 -1.78 -0.69 -10.39
2008 15.03 5.80 -2.14 -0.83 -12.47
2009 15.80 6.10 -1.37 -0.53 -8.01
2010 17.62 6.80 0.45 0.17 2.62
2011 15.82 6.11 -1.35 -0.52 -7.84
2012 15.99 6.18 -1.18 -0.45 -6.85
2013 17.78 6.86 0.61 0.23 3.53
2014 14.77 5.70 -2.40 -0.93 -14.00