Sea Ice and Snow Cover Extent

Sea ice extent provided by the National Snow and Ice Data Center (NSIDC) is available from 1979–2015 for the Northern Hemisphere, Southern Hemisphere, and Globe. Snow cover extent provided by the Rutgers University Global Snow Laboratory (GSL) is available from 1967–2015 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
1967 47.43 18.31 1.82 0.70 3.99
1968 45.48 17.56 -0.13 -0.05 -0.28
1969 48.23 18.62 2.62 1.01 5.75
1970 44.91 17.34 -0.70 -0.27 -1.54
1971 46.24 17.85 0.63 0.24 1.37
1972 50.84 19.63 5.23 2.02 11.46
1973 45.16 17.44 -0.45 -0.17 -0.99
1974 43.94 16.97 -1.67 -0.64 -3.65
1975 43.55 16.82 -2.06 -0.79 -4.51
1976 45.23 17.47 -0.38 -0.14 -0.82
1977 44.39 17.14 -1.22 -0.47 -2.67
1978 51.32 19.81 5.71 2.20 12.52
1979 47.68 18.41 2.07 0.80 4.53
1980 50.41 19.46 4.80 1.85 10.53
1981 43.72 16.88 -1.89 -0.73 -4.15
1982 46.27 17.86 0.66 0.25 1.45
1983 46.81 18.07 1.20 0.46 2.63
1984 46.89 18.11 1.28 0.50 2.82
1985 48.52 18.73 2.91 1.12 6.38
1986 47.92 18.50 2.31 0.89 5.07
1987 45.74 17.66 0.13 0.05 0.29
1988 47.24 18.24 1.63 0.63 3.57
1989 44.23 17.08 -1.38 -0.53 -3.03
1990 42.16 16.28 -3.45 -1.33 -7.56
1991 44.20 17.06 -1.41 -0.55 -3.10
1992 43.53 16.81 -2.08 -0.80 -4.55
1993 43.88 16.94 -1.73 -0.67 -3.79
1994 45.92 17.73 0.31 0.12 0.69
1995 42.67 16.47 -2.94 -1.14 -6.45
1996 46.84 18.08 1.23 0.47 2.69
1997 45.58 17.60 -0.03 -0.01 -0.06
1998 44.77 17.29 -0.84 -0.32 -1.84
1999 43.85 16.93 -1.76 -0.68 -3.86
2000 47.35 18.28 1.74 0.67 3.81
2001 45.50 17.57 -0.11 -0.04 -0.25
2002 42.93 16.57 -2.68 -1.04 -5.88
2003 48.54 18.74 2.93 1.13 6.43
2004 47.28 18.26 1.67 0.65 3.67
2005 47.64 18.39 2.03 0.78 4.44
2006 46.03 17.77 0.42 0.16 0.93
2007 43.91 16.95 -1.70 -0.66 -3.74
2008 47.41 18.31 1.80 0.70 3.95
2009 43.55 16.81 -2.06 -0.80 -4.52
2010 47.53 18.35 1.92 0.74 4.21
2011 46.59 17.99 0.98 0.38 2.16
2012 50.22 19.39 4.61 1.78 10.11
2013 47.00 18.15 1.39 0.54 3.04
2014 46.81 18.07 1.20 0.46 2.62
2015 44.99 17.37 -0.62 -0.24 -1.36