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 26.89 10.38 2.40 0.92 9.80
1968 23.59 9.11 -0.90 -0.35 -3.69
1969 24.59 9.49 0.10 0.03 0.40
1970 25.66 9.91 1.17 0.45 4.78
1971 27.08 10.45 2.59 0.99 10.56
1972 25.61 9.89 1.12 0.43 4.57
1973 25.56 9.87 1.07 0.41 4.38
1974 24.01 9.27 -0.48 -0.19 -1.96
1975 24.32 9.39 -0.17 -0.07 -0.69
1976 25.68 9.92 1.19 0.46 4.87
1977 24.21 9.35 -0.28 -0.11 -1.13
1978 26.60 10.27 2.11 0.81 8.61
1979 27.07 10.45 2.58 0.99 10.53
1980 26.62 10.28 2.13 0.82 8.70
1981 27.95 10.79 3.46 1.33 14.13
1982 24.40 9.42 -0.09 -0.04 -0.37
1983 24.48 9.45 -0.01 -0.01 -0.04
1984 24.72 9.54 0.23 0.08 0.94
1985 27.93 10.78 3.44 1.32 14.05
1986 24.77 9.56 0.28 0.10 1.15
1987 27.64 10.67 3.15 1.21 12.86
1988 25.25 9.75 0.76 0.29 3.10
1989 22.73 8.78 -1.76 -0.68 -7.17
1990 22.07 8.52 -2.42 -0.94 -9.87
1991 24.47 9.45 -0.02 -0.01 -0.08
1992 23.84 9.20 -0.65 -0.26 -2.67
1993 23.97 9.26 -0.52 -0.20 -2.10
1994 24.22 9.35 -0.27 -0.11 -1.10
1995 23.02 8.89 -1.47 -0.57 -6.02
1996 25.65 9.90 1.16 0.44 4.73
1997 23.17 8.95 -1.32 -0.51 -5.38
1998 25.01 9.66 0.52 0.20 2.14
1999 23.95 9.25 -0.54 -0.21 -2.22
2000 25.06 9.67 0.57 0.21 2.31
2001 24.39 9.42 -0.10 -0.04 -0.40
2002 21.18 8.18 -3.31 -1.28 -13.50
2003 26.07 10.06 1.58 0.60 6.43
2004 23.20 8.96 -1.29 -0.50 -5.26
2005 25.52 9.85 1.03 0.39 4.20
2006 24.86 9.60 0.37 0.14 1.50
2007 24.02 9.28 -0.47 -0.18 -1.90
2008 21.34 8.24 -3.15 -1.22 -12.85
2009 23.79 9.19 -0.70 -0.27 -2.85
2010 26.08 10.07 1.59 0.61 6.47
2011 26.01 10.04 1.52 0.58 6.23
2012 26.07 10.06 1.58 0.60 6.44
2013 25.05 9.67 0.56 0.21 2.30
2014 22.21 8.58 -2.28 -0.88 -9.30