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 30.24 11.68 1.76 0.68 6.19
1968 27.76 10.72 -0.72 -0.28 -2.52
1969 30.38 11.73 1.90 0.73 6.69
1970 28.17 10.88 -0.31 -0.12 -1.09
1971 29.10 11.24 0.62 0.24 2.18
1972 31.99 12.35 3.51 1.35 12.31
1973 29.76 11.49 1.28 0.49 4.50
1974 28.76 11.10 0.28 0.10 0.99
1975 27.46 10.60 -1.02 -0.40 -3.58
1976 28.54 11.02 0.06 0.02 0.21
1977 28.34 10.94 -0.14 -0.06 -0.50
1978 32.29 12.47 3.81 1.47 13.36
1979 28.88 11.15 0.40 0.15 1.42
1980 30.30 11.70 1.82 0.70 6.40
1981 27.81 10.74 -0.67 -0.26 -2.35
1982 28.26 10.91 -0.22 -0.09 -0.78
1983 29.89 11.54 1.41 0.54 4.94
1984 28.32 10.94 -0.16 -0.06 -0.55
1985 30.23 11.67 1.75 0.67 6.14
1986 30.02 11.59 1.54 0.59 5.40
1987 29.27 11.30 0.79 0.30 2.76
1988 28.34 10.94 -0.14 -0.06 -0.48
1989 26.80 10.35 -1.68 -0.65 -5.90
1990 26.87 10.37 -1.61 -0.63 -5.66
1991 29.46 11.38 0.98 0.38 3.46
1992 27.70 10.70 -0.78 -0.30 -2.73
1993 27.47 10.61 -1.01 -0.39 -3.54
1994 28.74 11.10 0.26 0.10 0.93
1995 26.27 10.14 -2.21 -0.86 -7.75
1996 28.22 10.90 -0.26 -0.10 -0.91
1997 28.48 10.99 -0.00 -0.01 -0.01
1998 28.36 10.95 -0.12 -0.05 -0.43
1999 27.54 10.63 -0.94 -0.37 -3.30
2000 28.78 11.11 0.30 0.11 1.07
2001 27.82 10.74 -0.66 -0.26 -2.32
2002 25.91 10.01 -2.57 -0.99 -9.01
2003 30.73 11.87 2.25 0.87 7.90
2004 27.50 10.62 -0.98 -0.38 -3.44
2005 31.19 12.04 2.71 1.04 9.51
2006 29.19 11.27 0.71 0.27 2.48
2007 27.70 10.70 -0.78 -0.30 -2.73
2008 29.52 11.40 1.04 0.40 3.66
2009 27.64 10.67 -0.84 -0.33 -2.95
2010 30.33 11.71 1.85 0.71 6.49
2011 30.14 11.64 1.66 0.64 5.82
2012 31.58 12.19 3.10 1.19 10.88
2013 29.33 11.33 0.85 0.33 3.00
2014 28.90 11.16 0.42 0.16 1.46