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.

Place mouse on axis and left-click to pan; wheel up/down for zoom in/out (or shift key+left-click).

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 13.86 5.35 0.38 0.15 2.82
1967 13.11 5.06 -0.37 -0.14 -2.76
1968 13.37 5.16 -0.11 -0.04 -0.83
1969 13.07 5.05 -0.41 -0.15 -3.03
1970 13.44 5.19 -0.04 -0.01 -0.32
1971 13.99 5.40 0.51 0.20 3.81
1972 13.20 5.09 -0.28 -0.11 -2.11
1973 14.45 5.58 0.97 0.38 7.23
1974 12.15 4.69 -1.33 -0.51 -9.85
1975 13.40 5.17 -0.08 -0.03 -0.59
1976 12.96 5.00 -0.52 -0.20 -3.89
1977 12.38 4.78 -1.10 -0.42 -8.14
1978 13.65 5.27 0.17 0.07 1.29
1979 11.48 4.43 -2.00 -0.77 -14.81
1980 12.62 4.87 -0.86 -0.33 -6.39
1981 12.56 4.85 -0.92 -0.35 -6.80
1982 13.68 5.28 0.20 0.08 1.47
1983 13.48 5.20 -0.00 0.00 -0.03
1984 13.41 5.18 -0.07 -0.02 -0.50
1985 14.87 5.74 1.39 0.54 10.33
1986 14.42 5.57 0.94 0.37 6.96
1987 11.54 4.46 -1.94 -0.74 -14.36
1988 13.32 5.14 -0.16 -0.06 -1.19
1989 13.53 5.22 0.05 0.02 0.35
1990 12.14 4.69 -1.34 -0.51 -9.97
1991 14.75 5.70 1.27 0.50 9.43
1992 13.97 5.40 0.49 0.20 3.66
1993 14.47 5.59 0.99 0.39 7.31
1994 13.62 5.26 0.14 0.06 1.07
1995 14.10 5.44 0.62 0.24 4.60
1996 14.81 5.72 1.33 0.52 9.85
1997 13.47 5.20 -0.01 0.00 -0.09
1998 12.19 4.71 -1.29 -0.49 -9.55
1999 11.96 4.62 -1.52 -0.58 -11.28
2000 14.28 5.51 0.80 0.31 5.91
2001 12.71 4.91 -0.77 -0.29 -5.69
2002 14.16 5.47 0.68 0.27 5.01
2003 14.74 5.69 1.26 0.49 9.36
2004 13.38 5.17 -0.10 -0.03 -0.76
2005 13.00 5.02 -0.48 -0.18 -3.58
2006 13.37 5.16 -0.11 -0.04 -0.79
2007 13.19 5.09 -0.29 -0.11 -2.17
2008 13.32 5.14 -0.16 -0.06 -1.15
2009 12.13 4.68 -1.35 -0.52 -9.99
2010 13.96 5.39 0.48 0.19 3.58
2011 13.97 5.39 0.49 0.19 3.65
2012 14.03 5.42 0.55 0.22 4.05
2013 14.76 5.70 1.28 0.50 9.51