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 26.87 10.37 -0.26 -0.10 -0.96
1967 27.50 10.62 0.37 0.15 1.37
1968 26.48 10.22 -0.65 -0.25 -2.41
1969 26.18 10.11 -0.95 -0.36 -3.51
1970 28.79 11.12 1.66 0.65 6.11
1971 26.99 10.42 -0.14 -0.05 -0.52
1972 27.46 10.60 0.33 0.13 1.22
1973 27.66 10.68 0.53 0.21 1.96
1974 23.84 9.21 -3.29 -1.26 -12.12
1975 25.84 9.98 -1.29 -0.49 -4.75
1976 26.31 10.16 -0.82 -0.31 -3.03
1977 28.44 10.98 1.31 0.51 4.82
1978 26.26 10.14 -0.87 -0.33 -3.21
1979 22.93 8.85 -4.20 -1.62 -15.47
1980 22.88 8.83 -4.25 -1.64 -15.66
1981 27.09 10.46 -0.04 -0.01 -0.13
1982 26.64 10.29 -0.49 -0.18 -1.80
1983 26.37 10.18 -0.76 -0.29 -2.80
1984 25.63 9.90 -1.50 -0.57 -5.52
1985 28.22 10.89 1.09 0.42 4.00
1986 26.10 10.08 -1.03 -0.39 -3.79
1987 26.35 10.17 -0.78 -0.30 -2.88
1988 25.62 9.89 -1.51 -0.58 -5.57
1989 27.38 10.57 0.25 0.10 0.93
1990 27.28 10.53 0.15 0.06 0.56
1991 26.95 10.41 -0.18 -0.06 -0.65
1992 27.78 10.72 0.65 0.25 2.39
1993 28.02 10.82 0.89 0.35 3.27
1994 26.94 10.40 -0.19 -0.07 -0.70
1995 27.65 10.67 0.52 0.20 1.91
1996 25.25 9.75 -1.88 -0.72 -6.95
1997 27.43 10.59 0.30 0.12 1.10
1998 27.33 10.55 0.20 0.08 0.72
1999 27.63 10.67 0.50 0.20 1.86
2000 26.45 10.21 -0.68 -0.26 -2.51
2001 28.65 11.06 1.52 0.59 5.59
2002 29.70 11.47 2.57 1.00 9.47
2003 26.21 10.12 -0.92 -0.35 -3.38
2004 28.18 10.88 1.05 0.41 3.87
2005 27.44 10.59 0.31 0.12 1.12
2006 25.96 10.02 -1.17 -0.45 -4.31
2007 26.62 10.28 -0.51 -0.19 -1.88
2008 26.33 10.17 -0.80 -0.30 -2.94
2009 28.18 10.88 1.05 0.41 3.87
2010 28.67 11.07 1.54 0.60 5.66
2011 27.13 10.48 0.00 0.01 0.00
2012 29.51 11.39 2.38 0.92 8.77
2013 27.36 10.57 0.23 0.10 0.86