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 30.73 11.87 1.41 0.55 4.83
1968 28.67 11.07 -0.65 -0.25 -2.23
1969 29.79 11.50 0.47 0.18 1.59
1970 29.98 11.58 0.66 0.26 2.26
1971 29.46 11.37 0.14 0.05 0.47
1972 30.38 11.73 1.06 0.41 3.61
1973 29.46 11.37 0.14 0.05 0.46
1974 28.65 11.06 -0.67 -0.26 -2.29
1975 27.58 10.65 -1.74 -0.67 -5.94
1976 28.40 10.97 -0.92 -0.35 -3.13
1977 31.34 12.10 2.02 0.78 6.88
1978 31.39 12.12 2.07 0.80 7.06
1979 30.79 11.89 1.47 0.57 5.00
1980 28.35 10.94 -0.97 -0.38 -3.32
1981 25.82 9.97 -3.50 -1.35 -11.93
1982 29.69 11.46 0.37 0.14 1.25
1983 29.21 11.28 -0.11 -0.04 -0.36
1984 28.10 10.85 -1.22 -0.47 -4.14
1985 31.36 12.11 2.04 0.79 6.96
1986 29.18 11.27 -0.14 -0.05 -0.48
1987 30.36 11.72 1.04 0.40 3.54
1988 29.17 11.26 -0.15 -0.06 -0.53
1989 29.16 11.26 -0.16 -0.06 -0.53
1990 28.81 11.12 -0.51 -0.20 -1.73
1991 28.61 11.05 -0.71 -0.27 -2.43
1992 29.34 11.33 0.02 0.01 0.08
1993 28.98 11.19 -0.34 -0.13 -1.16
1994 27.55 10.64 -1.77 -0.68 -6.05
1995 28.80 11.12 -0.52 -0.20 -1.79
1996 29.46 11.37 0.14 0.05 0.48
1997 29.14 11.25 -0.18 -0.07 -0.61
1998 29.01 11.20 -0.31 -0.12 -1.07
1999 27.65 10.68 -1.67 -0.64 -5.70
2000 30.36 11.72 1.04 0.40 3.53
2001 28.96 11.18 -0.36 -0.14 -1.23
2002 29.74 11.48 0.42 0.16 1.43
2003 31.06 11.99 1.74 0.67 5.93
2004 29.97 11.57 0.65 0.25 2.20
2005 28.77 11.11 -0.55 -0.21 -1.87
2006 31.49 12.16 2.17 0.84 7.39
2007 27.46 10.60 -1.86 -0.72 -6.36
2008 32.27 12.46 2.95 1.14 10.04
2009 29.70 11.47 0.38 0.15 1.29
2010 30.52 11.78 1.20 0.46 4.09
2011 30.61 11.82 1.29 0.50 4.39
2012 30.76 11.88 1.44 0.56 4.92
2013 31.22 12.05 1.90 0.73 6.48
2014 28.66 11.07 -0.66 -0.25 -2.24