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
1966 43.00 16.60 -0.98 -0.38 -2.22
1967 44.07 17.01 0.09 0.03 0.20
1968 43.77 16.90 -0.21 -0.08 -0.48
1969 43.35 16.74 -0.63 -0.24 -1.44
1970 46.12 17.81 2.14 0.83 4.86
1971 44.12 17.04 0.14 0.06 0.33
1972 44.80 17.30 0.82 0.32 1.87
1973 44.29 17.10 0.31 0.12 0.70
1974 39.49 15.25 -4.49 -1.73 -10.20
1975 42.45 16.39 -1.53 -0.59 -3.47
1976 42.27 16.32 -1.71 -0.66 -3.89
1977 44.97 17.36 0.99 0.38 2.26
1978 43.91 16.95 -0.07 -0.03 -0.15
1979 37.87 14.62 -6.11 -2.36 -13.90
1980 37.44 14.46 -6.54 -2.52 -14.87
1981 43.74 16.89 -0.24 -0.09 -0.55
1982 42.99 16.60 -0.99 -0.38 -2.26
1983 44.40 17.14 0.42 0.16 0.97
1984 42.33 16.34 -1.65 -0.64 -3.76
1985 46.25 17.86 2.27 0.88 5.16
1986 41.89 16.17 -2.09 -0.81 -4.75
1987 42.51 16.41 -1.47 -0.57 -3.34
1988 41.31 15.95 -2.67 -1.03 -6.06
1989 44.96 17.36 0.98 0.38 2.23
1990 44.21 17.07 0.23 0.09 0.53
1991 43.03 16.61 -0.95 -0.37 -2.17
1992 45.73 17.65 1.75 0.67 3.97
1993 44.03 17.00 0.05 0.02 0.12
1994 43.58 16.83 -0.40 -0.15 -0.91
1995 44.11 17.03 0.13 0.05 0.30
1996 41.96 16.20 -2.02 -0.78 -4.60
1997 44.29 17.10 0.31 0.12 0.70
1998 43.73 16.88 -0.25 -0.10 -0.57
1999 42.99 16.60 -0.99 -0.38 -2.25
2000 44.37 17.13 0.39 0.15 0.90
2001 45.23 17.46 1.25 0.48 2.84
2002 45.87 17.71 1.89 0.73 4.29
2003 43.26 16.70 -0.72 -0.28 -1.63
2004 44.37 17.13 0.39 0.15 0.88
2005 44.52 17.19 0.54 0.21 1.22
2006 42.27 16.32 -1.71 -0.66 -3.88
2007 44.59 17.22 0.61 0.24 1.39
2008 43.99 16.98 0.01 0.00 0.02
2009 46.45 17.94 2.47 0.96 5.62
2010 46.47 17.94 2.49 0.96 5.67
2011 43.30 16.72 -0.68 -0.26 -1.55
2012 46.85 18.09 2.87 1.11 6.52
2013 45.27 17.48 1.29 0.50 2.94