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 17.78 6.87 0.24 0.10 1.38
1968 17.62 6.80 0.08 0.03 0.47
1969 17.94 6.93 0.40 0.16 2.28
1970 18.28 7.06 0.74 0.29 4.19
1971 17.95 6.93 0.41 0.16 2.35
1972 16.93 6.54 -0.61 -0.23 -3.48
1973 16.79 6.48 -0.75 -0.29 -4.26
1974 17.41 6.72 -0.13 -0.05 -0.76
1975 17.37 6.71 -0.17 -0.06 -0.97
1976 17.27 6.67 -0.27 -0.10 -1.52
1977 17.66 6.82 0.12 0.05 0.69
1978 18.33 7.08 0.79 0.31 4.51
1979 18.63 7.19 1.09 0.42 6.21
1980 17.56 6.78 0.02 0.01 0.11
1981 16.07 6.20 -1.47 -0.57 -8.40
1982 18.56 7.17 1.02 0.40 5.83
1983 17.30 6.68 -0.24 -0.09 -1.39
1984 18.42 7.11 0.88 0.34 4.99
1985 18.82 7.26 1.28 0.49 7.27
1986 17.20 6.64 -0.34 -0.13 -1.95
1987 17.42 6.72 -0.12 -0.05 -0.70
1988 18.23 7.04 0.69 0.27 3.93
1989 16.72 6.46 -0.82 -0.31 -4.67
1990 16.86 6.51 -0.68 -0.26 -3.87
1991 17.64 6.81 0.10 0.04 0.56
1992 16.88 6.52 -0.66 -0.25 -3.78
1993 17.90 6.91 0.36 0.14 2.04
1994 17.72 6.84 0.18 0.07 1.05
1995 17.33 6.69 -0.21 -0.08 -1.19
1996 17.46 6.74 -0.08 -0.03 -0.43
1997 17.62 6.80 0.08 0.03 0.43
1998 17.08 6.59 -0.46 -0.18 -2.63
1999 17.04 6.58 -0.50 -0.19 -2.83
2000 17.26 6.66 -0.28 -0.11 -1.62
2001 18.09 6.98 0.55 0.21 3.12
2002 17.19 6.64 -0.35 -0.13 -2.02
2003 16.95 6.54 -0.59 -0.23 -3.37
2004 18.11 6.99 0.57 0.22 3.28
2005 17.79 6.87 0.25 0.10 1.41
2006 16.52 6.38 -1.02 -0.39 -5.81
2007 17.91 6.92 0.37 0.15 2.11
2008 18.01 6.95 0.47 0.18 2.68
2009 17.90 6.91 0.36 0.14 2.06
2010 18.32 7.07 0.78 0.30 4.43
2011 18.50 7.14 0.96 0.37 5.46
2012 16.71 6.45 -0.83 -0.32 -4.74
2013 17.99 6.95 0.45 0.18 2.59
2014 17.37 6.71 -0.17 -0.06 -0.96