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 42.98 16.59 2.85 1.10 7.09
1968 37.63 14.53 -2.50 -0.96 -6.24
1969 41.88 16.17 1.75 0.68 4.36
1970 42.00 16.22 1.87 0.73 4.66
1971 44.07 17.01 3.94 1.52 9.81
1972 40.89 15.79 0.76 0.30 1.89
1973 40.31 15.56 0.18 0.07 0.44
1974 39.47 15.24 -0.66 -0.25 -1.66
1975 41.27 15.93 1.14 0.44 2.84
1976 41.45 16.00 1.32 0.51 3.28
1977 40.05 15.47 -0.08 -0.02 -0.19
1978 43.76 16.90 3.63 1.41 9.04
1979 43.72 16.88 3.59 1.39 8.95
1980 42.77 16.51 2.64 1.02 6.58
1981 42.65 16.47 2.52 0.98 6.29
1982 40.69 15.71 0.56 0.22 1.39
1983 40.41 15.60 0.28 0.11 0.70
1984 41.12 15.88 0.99 0.39 2.48
1985 44.28 17.10 4.15 1.61 10.35
1986 39.93 15.42 -0.20 -0.07 -0.50
1987 43.63 16.84 3.50 1.35 8.71
1988 39.87 15.39 -0.26 -0.10 -0.64
1989 38.57 14.89 -1.56 -0.60 -3.88
1990 37.12 14.33 -3.01 -1.16 -7.50
1991 39.45 15.23 -0.68 -0.26 -1.69
1992 38.54 14.88 -1.59 -0.61 -3.97
1993 39.78 15.36 -0.35 -0.13 -0.88
1994 39.40 15.21 -0.73 -0.28 -1.81
1995 38.25 14.77 -1.88 -0.72 -4.69
1996 41.86 16.16 1.72 0.67 4.30
1997 39.02 15.07 -1.11 -0.42 -2.76
1998 41.35 15.96 1.22 0.47 3.03
1999 39.67 15.32 -0.46 -0.17 -1.15
2000 39.59 15.29 -0.54 -0.20 -1.34
2001 40.52 15.64 0.39 0.15 0.97
2002 37.62 14.52 -2.51 -0.97 -6.26
2003 41.68 16.09 1.55 0.60 3.86
2004 38.70 14.94 -1.43 -0.55 -3.56
2005 41.08 15.86 0.95 0.37 2.36
2006 40.98 15.82 0.85 0.33 2.11
2007 39.42 15.22 -0.71 -0.27 -1.77
2008 37.85 14.62 -2.28 -0.87 -5.67
2009 39.71 15.33 -0.42 -0.16 -1.04
2010 41.14 15.88 1.01 0.39 2.51
2011 42.63 16.46 2.50 0.97 6.22
2012 40.74 15.73 0.61 0.24 1.52
2013 41.68 16.09 1.55 0.60 3.86
2014 38.41 14.83 -1.72 -0.66 -4.28