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 21.08 8.14 0.61 0.24 3.00
1967 21.40 8.26 0.93 0.36 4.57
1968 22.12 8.54 1.65 0.64 8.04
1969 21.10 8.15 0.63 0.25 3.06
1970 22.07 8.52 1.60 0.62 7.83
1971 20.17 7.79 -0.30 -0.11 -1.45
1972 22.68 8.76 2.21 0.86 10.79
1973 22.87 8.83 2.40 0.93 11.72
1974 18.34 7.08 -2.13 -0.82 -10.41
1975 17.41 6.72 -3.06 -1.18 -14.96
1976 21.68 8.37 1.21 0.47 5.91
1977 19.21 7.42 -1.26 -0.48 -6.18
1978 17.93 6.92 -2.54 -0.98 -12.42
1979 16.80 6.49 -3.67 -1.41 -17.95
1980 18.66 7.20 -1.81 -0.70 -8.84
1981 21.01 8.11 0.54 0.21 2.65
1982 20.03 7.73 -0.44 -0.17 -2.17
1983 19.16 7.40 -1.31 -0.50 -6.42
1984 19.99 7.72 -0.48 -0.18 -2.36
1985 23.03 8.89 2.56 0.99 12.51
1986 19.50 7.53 -0.97 -0.37 -4.75
1987 20.59 7.95 0.12 0.05 0.60
1988 18.27 7.05 -2.20 -0.85 -10.75
1989 19.29 7.45 -1.18 -0.45 -5.76
1990 18.07 6.98 -2.40 -0.92 -11.70
1991 19.60 7.57 -0.87 -0.33 -4.25
1992 20.08 7.75 -0.39 -0.15 -1.92
1993 24.13 9.32 3.66 1.42 17.89
1994 19.98 7.72 -0.49 -0.18 -2.38
1995 20.94 8.09 0.47 0.19 2.30
1996 20.44 7.89 -0.03 -0.01 -0.15
1997 20.99 8.10 0.52 0.20 2.52
1998 21.78 8.41 1.31 0.51 6.41
1999 22.09 8.53 1.62 0.63 7.93
2000 20.83 8.04 0.36 0.14 1.76
2001 19.15 7.39 -1.32 -0.51 -6.45
2002 21.44 8.28 0.97 0.38 4.75
2003 20.88 8.06 0.41 0.16 1.99
2004 20.74 8.01 0.27 0.11 1.33
2005 19.04 7.35 -1.43 -0.55 -7.00
2006 20.84 8.05 0.37 0.15 1.81
2007 20.03 7.73 -0.44 -0.17 -2.14
2008 19.20 7.41 -1.27 -0.49 -6.19
2009 22.64 8.74 2.17 0.84 10.60
2010 20.44 7.89 -0.03 -0.01 -0.13
2011 22.96 8.86 2.49 0.96 12.16
2012 22.51 8.69 2.04 0.79 9.96
2013 20.00 7.72 -0.47 -0.18 -2.29
2014 21.18 8.18 0.71 0.28 3.48