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 17.57 6.78 0.03 0.01 0.18
1968 19.77 7.63 2.23 0.86 12.73
1970 21.84 8.43 4.30 1.66 24.51
1971 21.53 8.31 3.99 1.54 22.75
1972 21.52 8.31 3.98 1.54 22.71
1973 17.96 6.93 0.42 0.16 2.38
1974 19.01 7.34 1.47 0.57 8.36
1975 16.78 6.48 -0.76 -0.29 -4.33
1976 25.72 9.93 8.18 3.16 46.66
1977 19.06 7.36 1.52 0.59 8.65
1978 17.96 6.93 0.42 0.16 2.37
1979 14.68 5.67 -2.86 -1.10 -16.30
1980 13.61 5.25 -3.93 -1.52 -22.41
1981 16.75 6.47 -0.79 -0.30 -4.49
1982 17.43 6.73 -0.11 -0.04 -0.65
1983 17.17 6.63 -0.37 -0.14 -2.11
1984 17.44 6.73 -0.10 -0.04 -0.57
1985 17.45 6.74 -0.09 -0.03 -0.51
1986 17.44 6.73 -0.10 -0.04 -0.59
1987 13.35 5.15 -4.19 -1.62 -23.91
1988 12.78 4.93 -4.76 -1.84 -27.13
1989 16.68 6.44 -0.86 -0.33 -4.87
1990 15.25 5.89 -2.29 -0.88 -13.06
1991 15.58 6.02 -1.96 -0.75 -11.18
1992 16.78 6.48 -0.76 -0.29 -4.36
1993 18.22 7.03 0.68 0.26 3.87
1994 14.23 5.49 -3.31 -1.28 -18.86
1995 17.54 6.77 -0.00 0.00 -0.03
1996 19.14 7.39 1.60 0.62 9.13
1997 17.54 6.77 0.00 0.00 0.01
1998 19.38 7.48 1.84 0.71 10.47
1999 17.55 6.78 0.01 0.01 0.08
2000 18.50 7.14 0.96 0.37 5.49
2001 19.06 7.36 1.52 0.59 8.67
2002 23.24 8.97 5.70 2.20 32.48
2003 18.21 7.03 0.67 0.26 3.83
2004 19.69 7.60 2.15 0.83 12.26
2005 16.77 6.47 -0.77 -0.30 -4.40
2006 20.35 7.86 2.81 1.09 16.05
2007 16.20 6.26 -1.34 -0.51 -7.62
2008 16.63 6.42 -0.91 -0.35 -5.19
2009 21.01 8.11 3.47 1.34 19.79
2010 18.97 7.32 1.43 0.55 8.15
2011 17.34 6.70 -0.20 -0.07 -1.13
2012 20.14 7.78 2.60 1.01 14.81
2013 21.01 8.11 3.47 1.34 19.77
2014 22.88 8.83 5.34 2.06 30.42