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 14.30 5.52 1.26 0.49 9.65
1968 12.16 4.69 -0.88 -0.34 -6.77
1969 13.12 5.07 0.08 0.04 0.64
1970 14.41 5.56 1.37 0.53 10.49
1971 13.61 5.25 0.57 0.22 4.36
1972 13.65 5.27 0.61 0.24 4.65
1973 13.39 5.17 0.35 0.14 2.68
1974 14.19 5.48 1.15 0.45 8.84
1975 15.08 5.82 2.04 0.79 15.62
1976 11.99 4.63 -1.05 -0.40 -8.08
1977 13.03 5.03 -0.01 0.00 -0.04
1978 13.64 5.27 0.60 0.24 4.61
1979 14.79 5.71 1.75 0.68 13.39
1980 13.27 5.12 0.23 0.09 1.79
1981 12.93 4.99 -0.11 -0.04 -0.83
1982 14.82 5.72 1.78 0.69 13.61
1983 13.62 5.26 0.58 0.23 4.43
1984 12.45 4.81 -0.59 -0.22 -4.55
1985 13.97 5.39 0.93 0.36 7.11
1986 13.03 5.03 -0.01 0.00 -0.05
1987 11.88 4.59 -1.16 -0.44 -8.86
1988 12.46 4.81 -0.58 -0.22 -4.43
1989 13.47 5.20 0.43 0.17 3.27
1990 12.68 4.90 -0.36 -0.13 -2.73
1991 12.40 4.79 -0.64 -0.24 -4.93
1992 12.78 4.93 -0.26 -0.10 -2.00
1993 12.29 4.75 -0.75 -0.28 -5.72
1994 12.96 5.00 -0.08 -0.03 -0.64
1995 14.41 5.56 1.37 0.53 10.52
1996 13.87 5.36 0.83 0.33 6.36
1997 14.63 5.65 1.59 0.62 12.23
1998 12.23 4.72 -0.81 -0.31 -6.21
1999 12.70 4.90 -0.34 -0.13 -2.62
2000 12.58 4.86 -0.46 -0.17 -3.53
2001 13.09 5.06 0.05 0.03 0.41
2002 13.62 5.26 0.58 0.23 4.47
2003 13.44 5.19 0.40 0.16 3.03
2004 12.52 4.84 -0.52 -0.19 -3.95
2005 12.22 4.72 -0.82 -0.31 -6.26
2006 12.23 4.72 -0.81 -0.31 -6.22
2007 12.94 5.00 -0.10 -0.03 -0.78
2008 14.26 5.51 1.22 0.48 9.39
2009 13.73 5.30 0.69 0.27 5.29
2010 11.02 4.25 -2.02 -0.78 -15.49
2011 14.11 5.45 1.07 0.42 8.17
2012 12.27 4.74 -0.77 -0.29 -5.88
2013 14.81 5.72 1.77 0.69 13.60
2014 13.79 5.32 0.75 0.29 5.74