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
1967 47.43 18.31 1.84 0.71 4.04
1968 43.74 16.89 -1.85 -0.71 -4.06
1969 48.23 18.62 2.64 1.02 5.80
1970 44.91 17.34 -0.68 -0.26 -1.49
1971 46.24 17.85 0.65 0.25 1.42
1972 48.89 18.87 3.30 1.27 7.23
1973 46.62 18.00 1.03 0.40 2.25
1974 45.33 17.50 -0.26 -0.10 -0.56
1975 44.94 17.35 -0.65 -0.25 -1.42
1976 45.23 17.47 -0.36 -0.13 -0.78
1977 44.39 17.14 -1.20 -0.46 -2.63
1978 51.32 19.81 5.73 2.21 12.57
1979 47.68 18.41 2.09 0.81 4.58
1980 48.50 18.73 2.91 1.13 6.39
1981 43.72 16.88 -1.87 -0.72 -4.11
1982 46.27 17.86 0.68 0.26 1.49
1983 46.81 18.07 1.22 0.47 2.67
1984 45.12 17.42 -0.47 -0.18 -1.03
1985 48.52 18.73 2.93 1.13 6.43
1986 47.92 18.50 2.33 0.90 5.11
1987 45.74 17.66 0.15 0.06 0.34
1988 45.42 17.54 -0.17 -0.06 -0.38
1989 44.23 17.08 -1.36 -0.52 -2.98
1990 43.51 16.80 -2.08 -0.80 -4.56
1991 45.59 17.60 -0.00 0.00 -0.01
1992 43.53 16.81 -2.06 -0.79 -4.51
1993 45.27 17.48 -0.32 -0.12 -0.70
1994 45.92 17.73 0.33 0.13 0.73
1995 42.67 16.47 -2.92 -1.13 -6.41
1996 45.03 17.39 -0.56 -0.21 -1.23
1997 45.58 17.60 -0.01 -0.00 -0.02
1998 44.77 17.29 -0.82 -0.31 -1.80
1999 43.85 16.93 -1.74 -0.67 -3.82
2000 45.54 17.58 -0.05 -0.02 -0.11
2001 45.50 17.57 -0.09 -0.03 -0.21
2002 42.93 16.57 -2.66 -1.03 -5.84
2003 48.54 18.74 2.95 1.14 6.47
2004 45.48 17.56 -0.11 -0.04 -0.23
2005 47.64 18.39 2.05 0.79 4.49
2006 46.03 17.77 0.44 0.17 0.97
2007 45.30 17.49 -0.29 -0.11 -0.65
2008 47.41 18.31 1.82 0.71 4.00
2009 44.93 17.35 -0.66 -0.25 -1.45
2010 49.05 18.94 3.46 1.34 7.58
2011 48.08 18.57 2.49 0.97 5.47
2012 48.33 18.66 2.74 1.06 6.01
2013 47.00 18.15 1.41 0.55 3.09
2014 46.81 18.07 1.22 0.47 2.67