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 33.11 12.78 2.89 1.11 9.57
1968 28.00 10.81 -2.22 -0.86 -7.34
1969 30.45 11.76 0.23 0.09 0.76
1970 33.81 13.05 3.59 1.38 11.88
1971 31.25 12.06 1.03 0.39 3.40
1972 31.51 12.16 1.29 0.49 4.25
1973 31.39 12.12 1.17 0.45 3.86
1974 30.93 11.94 0.71 0.27 2.34
1975 31.67 12.23 1.45 0.56 4.81
1976 30.06 11.61 -0.16 -0.06 -0.54
1977 30.94 11.95 0.72 0.28 2.38
1978 30.20 11.66 -0.02 -0.01 -0.07
1979 34.61 13.36 4.39 1.69 14.51
1980 33.57 12.96 3.35 1.29 11.07
1981 33.62 12.98 3.40 1.31 11.24
1982 31.76 12.26 1.54 0.59 5.11
1983 30.12 11.63 -0.10 -0.04 -0.33
1984 30.62 11.82 0.40 0.15 1.32
1985 32.68 12.62 2.46 0.95 8.15
1986 30.37 11.73 0.15 0.06 0.50
1987 31.03 11.98 0.81 0.31 2.68
1988 29.04 11.21 -1.18 -0.46 -3.90
1989 30.04 11.60 -0.18 -0.07 -0.59
1990 28.12 10.86 -2.10 -0.81 -6.95
1991 28.57 11.03 -1.65 -0.64 -5.45
1992 28.82 11.13 -1.40 -0.54 -4.64
1993 28.38 10.96 -1.84 -0.71 -6.09
1994 29.75 11.49 -0.47 -0.18 -1.54
1995 32.95 12.72 2.73 1.05 9.03
1996 33.12 12.79 2.90 1.12 9.59
1997 30.99 11.97 0.77 0.30 2.55
1998 30.88 11.92 0.66 0.25 2.18
1999 29.68 11.46 -0.54 -0.21 -1.80
2000 29.45 11.37 -0.77 -0.30 -2.56
2001 29.62 11.44 -0.60 -0.23 -1.99
2002 30.54 11.79 0.32 0.12 1.05
2003 31.43 12.14 1.21 0.47 4.01
2004 29.45 11.37 -0.77 -0.30 -2.55
2005 29.51 11.39 -0.71 -0.28 -2.34
2006 30.13 11.63 -0.09 -0.04 -0.29
2007 28.32 10.94 -1.90 -0.73 -6.27
2008 29.29 11.31 -0.93 -0.36 -3.07
2009 29.52 11.40 -0.70 -0.27 -2.30
2010 28.64 11.06 -1.58 -0.61 -5.23
2011 29.93 11.56 -0.29 -0.11 -0.96
2012 28.27 10.91 -1.95 -0.76 -6.46
2013 32.59 12.58 2.37 0.91 7.84
2014 28.55 11.03 -1.67 -0.64 -5.51