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 17.19 6.64 0.07 0.03 0.40
1968 15.98 6.17 -1.14 -0.44 -6.67
1969 17.85 6.89 0.73 0.28 4.25
1970 16.74 6.46 -0.38 -0.15 -2.22
1971 17.14 6.62 0.02 0.01 0.10
1972 16.90 6.52 -0.22 -0.09 -1.29
1973 16.85 6.51 -0.27 -0.10 -1.55
1974 16.57 6.40 -0.55 -0.21 -3.20
1975 17.49 6.75 0.37 0.14 2.13
1976 16.70 6.45 -0.42 -0.16 -2.48
1977 16.05 6.20 -1.07 -0.41 -6.23
1978 19.04 7.35 1.92 0.74 11.19
1979 18.79 7.26 1.67 0.65 9.78
1980 18.20 7.03 1.08 0.42 6.31
1981 15.91 6.14 -1.21 -0.47 -7.10
1982 18.01 6.95 0.89 0.34 5.21
1983 16.92 6.53 -0.20 -0.08 -1.15
1984 16.80 6.49 -0.32 -0.12 -1.87
1985 18.29 7.06 1.17 0.45 6.85
1986 17.90 6.91 0.78 0.30 4.57
1987 16.48 6.36 -0.64 -0.25 -3.76
1988 17.08 6.59 -0.04 -0.02 -0.26
1989 17.43 6.73 0.31 0.12 1.81
1990 16.64 6.43 -0.48 -0.18 -2.79
1991 16.12 6.22 -1.00 -0.39 -5.83
1992 15.83 6.11 -1.29 -0.50 -7.53
1993 17.80 6.87 0.68 0.26 3.98
1994 17.18 6.63 0.06 0.02 0.34
1995 16.39 6.33 -0.73 -0.28 -4.24
1996 16.81 6.49 -0.31 -0.12 -1.81
1997 17.11 6.60 -0.01 -0.01 -0.09
1998 16.41 6.34 -0.71 -0.27 -4.12
1999 16.31 6.30 -0.81 -0.31 -4.73
2000 16.75 6.47 -0.37 -0.14 -2.14
2001 17.68 6.82 0.56 0.21 3.25
2002 17.01 6.57 -0.11 -0.04 -0.62
2003 17.81 6.88 0.69 0.27 4.04
2004 17.98 6.94 0.86 0.33 5.04
2005 16.45 6.35 -0.67 -0.26 -3.93
2006 16.85 6.51 -0.27 -0.10 -1.59
2007 17.59 6.79 0.47 0.18 2.77
2008 17.89 6.91 0.77 0.30 4.50
2009 17.29 6.68 0.17 0.07 0.98
2010 18.72 7.23 1.60 0.62 9.34
2011 17.95 6.93 0.83 0.32 4.84
2012 16.75 6.47 -0.37 -0.14 -2.15
2013 17.66 6.82 0.54 0.21 3.17
2014 17.91 6.92 0.79 0.31 4.62