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 16.09 6.21 0.45 0.17 2.85
1968 14.04 5.42 -1.60 -0.62 -10.22
1969 17.29 6.68 1.65 0.64 10.57
1970 16.34 6.31 0.70 0.27 4.47
1971 16.99 6.56 1.35 0.52 8.64
1972 15.28 5.90 -0.36 -0.14 -2.30
1973 14.74 5.69 -0.90 -0.35 -5.73
1974 15.45 5.97 -0.19 -0.07 -1.19
1975 16.95 6.54 1.31 0.50 8.37
1976 15.76 6.09 0.12 0.05 0.79
1977 15.84 6.12 0.20 0.08 1.29
1978 17.16 6.63 1.52 0.59 9.71
1979 16.65 6.43 1.01 0.39 6.48
1980 16.15 6.23 0.51 0.19 3.25
1981 14.70 5.68 -0.94 -0.36 -5.98
1982 16.29 6.29 0.65 0.25 4.15
1983 15.93 6.15 0.29 0.11 1.85
1984 16.40 6.33 0.76 0.29 4.87
1985 16.35 6.31 0.71 0.27 4.54
1986 15.16 5.85 -0.48 -0.19 -3.08
1987 15.99 6.17 0.35 0.13 2.22
1988 14.62 5.65 -1.02 -0.39 -6.50
1989 15.84 6.12 0.20 0.08 1.27
1990 15.05 5.81 -0.59 -0.23 -3.78
1991 14.98 5.78 -0.66 -0.26 -4.21
1992 14.70 5.68 -0.94 -0.36 -6.02
1993 15.80 6.10 0.16 0.06 1.04
1994 15.18 5.86 -0.46 -0.18 -2.92
1995 15.23 5.88 -0.41 -0.16 -2.60
1996 16.21 6.26 0.57 0.22 3.62
1997 15.85 6.12 0.21 0.08 1.35
1998 16.33 6.31 0.69 0.27 4.42
1999 15.72 6.07 0.08 0.03 0.52
2000 14.54 5.61 -1.10 -0.43 -7.06
2001 16.13 6.23 0.49 0.19 3.12
2002 16.44 6.35 0.80 0.31 5.09
2003 15.62 6.03 -0.02 -0.01 -0.16
2004 15.50 5.98 -0.14 -0.06 -0.91
2005 15.56 6.01 -0.08 -0.03 -0.52
2006 16.12 6.22 0.48 0.18 3.07
2007 15.39 5.94 -0.25 -0.10 -1.57
2008 16.51 6.37 0.87 0.33 5.56
2009 15.92 6.15 0.28 0.11 1.80
2010 15.06 5.82 -0.58 -0.22 -3.68
2011 16.61 6.41 0.97 0.37 6.21
2012 14.67 5.67 -0.97 -0.37 -6.18
2013 16.63 6.42 0.99 0.38 6.30
2014 16.20 6.25 0.56 0.21 3.58