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 34.94 13.49 0.98 0.38 2.90
1967 34.51 13.33 0.55 0.22 1.63
1968 35.48 13.70 1.52 0.59 4.49
1969 34.17 13.19 0.21 0.08 0.61
1970 35.51 13.71 1.55 0.60 4.56
1971 34.17 13.19 0.21 0.08 0.61
1972 35.87 13.85 1.91 0.74 5.64
1973 37.32 14.41 3.36 1.30 9.90
1974 30.49 11.77 -3.47 -1.34 -10.21
1975 30.81 11.89 -3.15 -1.22 -9.28
1976 34.64 13.37 0.68 0.26 1.99
1977 31.59 12.20 -2.37 -0.91 -6.98
1978 31.58 12.19 -2.38 -0.92 -7.00
1979 28.28 10.92 -5.68 -2.19 -16.73
1980 31.28 12.08 -2.68 -1.03 -7.89
1981 33.58 12.96 -0.38 -0.15 -1.13
1982 33.71 13.01 -0.25 -0.10 -0.75
1983 32.63 12.60 -1.33 -0.51 -3.91
1984 33.40 12.90 -0.56 -0.21 -1.65
1985 37.90 14.63 3.94 1.52 11.61
1986 33.92 13.10 -0.04 -0.01 -0.13
1987 32.14 12.41 -1.82 -0.70 -5.36
1988 31.59 12.20 -2.37 -0.91 -6.98
1989 32.82 12.67 -1.14 -0.44 -3.36
1990 30.21 11.66 -3.75 -1.45 -11.04
1991 34.35 13.26 0.39 0.15 1.15
1992 34.05 13.15 0.09 0.04 0.27
1993 38.60 14.90 4.64 1.79 13.65
1994 33.61 12.98 -0.35 -0.13 -1.04
1995 35.04 13.53 1.08 0.42 3.18
1996 35.25 13.61 1.29 0.50 3.79
1997 34.45 13.30 0.49 0.19 1.46
1998 33.98 13.12 0.02 0.01 0.05
1999 34.05 13.15 0.09 0.04 0.28
2000 35.11 13.55 1.15 0.44 3.38
2001 31.86 12.30 -2.10 -0.81 -6.17
2002 35.60 13.74 1.64 0.63 4.82
2003 35.62 13.75 1.66 0.64 4.88
2004 34.12 13.17 0.16 0.06 0.47
2005 32.04 12.37 -1.92 -0.74 -5.67
2006 34.21 13.21 0.25 0.10 0.75
2007 33.22 12.83 -0.74 -0.28 -2.18
2008 32.53 12.56 -1.43 -0.55 -4.22
2009 34.77 13.43 0.81 0.32 2.40
2010 34.41 13.28 0.45 0.17 1.31
2011 36.93 14.26 2.97 1.15 8.75
2012 36.54 14.11 2.58 1.00 7.58
2013 34.76 13.42 0.80 0.31 2.37