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
1966 16.13 6.23 -0.72 -0.28 -4.24
1967 16.57 6.40 -0.28 -0.11 -1.68
1968 17.29 6.68 0.44 0.17 2.63
1969 17.17 6.63 0.32 0.12 1.88
1970 17.33 6.69 0.48 0.18 2.85
1971 17.13 6.62 0.28 0.11 1.69
1972 17.34 6.70 0.49 0.19 2.92
1973 16.62 6.42 -0.23 -0.09 -1.34
1974 15.65 6.04 -1.20 -0.47 -7.12
1975 16.61 6.41 -0.24 -0.10 -1.42
1976 15.96 6.16 -0.89 -0.35 -5.28
1977 16.54 6.38 -0.31 -0.13 -1.86
1978 17.65 6.82 0.80 0.31 4.77
1979 14.94 5.77 -1.91 -0.74 -11.36
1980 14.56 5.62 -2.29 -0.89 -13.60
1981 16.64 6.43 -0.21 -0.08 -1.22
1982 16.35 6.31 -0.50 -0.20 -2.99
1983 18.03 6.96 1.18 0.45 7.03
1984 16.69 6.45 -0.16 -0.06 -0.92
1985 18.03 6.96 1.18 0.45 7.01
1986 15.79 6.10 -1.06 -0.41 -6.29
1987 16.16 6.24 -0.69 -0.27 -4.08
1988 15.70 6.06 -1.15 -0.45 -6.85
1989 17.58 6.79 0.73 0.28 4.32
1990 16.93 6.54 0.08 0.03 0.49
1991 16.07 6.21 -0.78 -0.30 -4.62
1992 17.95 6.93 1.10 0.42 6.52
1993 16.02 6.18 -0.83 -0.33 -4.95
1994 16.64 6.43 -0.21 -0.08 -1.24
1995 16.47 6.36 -0.38 -0.15 -2.28
1996 16.71 6.45 -0.14 -0.06 -0.83
1997 16.86 6.51 0.01 -0.00 0.04
1998 16.40 6.33 -0.45 -0.18 -2.66
1999 15.36 5.93 -1.49 -0.58 -8.86
2000 17.92 6.92 1.07 0.41 6.37
2001 16.58 6.40 -0.27 -0.11 -1.59
2002 16.17 6.24 -0.68 -0.27 -4.04
2003 17.05 6.58 0.20 0.07 1.18
2004 16.19 6.25 -0.66 -0.26 -3.94
2005 17.08 6.60 0.23 0.09 1.37
2006 16.31 6.30 -0.54 -0.21 -3.19
2007 17.97 6.94 1.12 0.43 6.64
2008 17.66 6.82 0.81 0.31 4.78
2009 18.27 7.06 1.42 0.55 8.44
2010 17.81 6.88 0.96 0.37 5.69
2011 16.17 6.24 -0.68 -0.27 -4.04
2012 17.34 6.69 0.49 0.18 2.89
2013 17.91 6.92 1.06 0.41 6.29