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 48.52 18.73 1.65 0.63 3.51
1968 46.29 17.87 -0.58 -0.23 -1.24
1969 47.73 18.43 0.86 0.33 1.82
1970 48.26 18.63 1.39 0.53 2.96
1971 47.41 18.31 0.54 0.21 1.15
1972 47.31 18.27 0.44 0.17 0.94
1973 46.25 17.86 -0.62 -0.24 -1.33
1974 46.05 17.78 -0.82 -0.32 -1.74
1975 44.95 17.35 -1.92 -0.75 -4.10
1976 45.68 17.64 -1.19 -0.46 -2.55
1977 49.00 18.92 2.13 0.82 4.54
1978 49.72 19.20 2.85 1.10 6.08
1979 49.41 19.08 2.54 0.98 5.43
1980 45.91 17.72 -0.96 -0.38 -2.06
1981 41.89 16.17 -4.98 -1.93 -10.62
1982 48.25 18.63 1.38 0.53 2.94
1983 46.51 17.96 -0.36 -0.14 -0.77
1984 46.52 17.96 -0.35 -0.14 -0.75
1985 50.18 19.37 3.31 1.27 7.06
1986 46.38 17.91 -0.49 -0.19 -1.05
1987 47.77 18.45 0.90 0.35 1.93
1988 47.39 18.30 0.52 0.20 1.12
1989 45.89 17.72 -0.98 -0.38 -2.10
1990 45.67 17.63 -1.20 -0.47 -2.55
1991 46.24 17.86 -0.63 -0.24 -1.33
1992 46.22 17.85 -0.65 -0.25 -1.39
1993 46.88 18.10 0.01 0.00 0.02
1994 45.27 17.48 -1.60 -0.62 -3.42
1995 46.13 17.81 -0.74 -0.29 -1.58
1996 46.93 18.12 0.06 0.02 0.12
1997 46.76 18.05 -0.11 -0.05 -0.24
1998 46.08 17.79 -0.79 -0.31 -1.68
1999 44.69 17.26 -2.18 -0.84 -4.65
2000 47.61 18.38 0.74 0.28 1.58
2001 47.05 18.16 0.18 0.06 0.38
2002 46.93 18.12 0.06 0.02 0.12
2003 48.01 18.54 1.14 0.44 2.43
2004 48.08 18.56 1.21 0.46 2.58
2005 46.56 17.98 -0.31 -0.12 -0.66
2006 48.01 18.54 1.14 0.44 2.42
2007 45.37 17.52 -1.50 -0.58 -3.21
2008 50.28 19.41 3.41 1.31 7.27
2009 47.60 18.38 0.73 0.28 1.56
2010 48.84 18.86 1.97 0.76 4.20
2011 49.10 18.96 2.23 0.86 4.77
2012 47.47 18.33 0.60 0.23 1.28
2013 49.22 19.00 2.35 0.90 5.00
2014 46.03 17.77 -0.84 -0.33 -1.79