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: National Snow and Ice Data Center (NSIDC)

Download: xml csv json
Date Extent
million km²
Extent
million mi²
Anomaly
million km²
Anomaly
million mi²
Anomaly
% Difference
1979 20.92 8.08 1.02 0.40 5.13
1980 19.67 7.59 -0.23 -0.09 -1.16
1981 19.27 7.44 -0.63 -0.24 -3.17
1982 20.95 8.09 1.05 0.41 5.28
1983 20.42 7.88 0.52 0.20 2.61
1984 19.55 7.55 -0.35 -0.13 -1.76
1985 20.05 7.74 0.15 0.06 0.75
1986 20.16 7.78 0.26 0.10 1.31
1987 20.37 7.86 0.47 0.18 2.36
1988 20.48 7.91 0.58 0.23 2.91
1989 19.71 7.61 -0.19 -0.07 -0.95
1990 20.24 7.81 0.34 0.13 1.71
1991 19.83 7.66 -0.07 -0.02 -0.35
1992 19.54 7.54 -0.36 -0.14 -1.81
1993 20.06 7.75 0.16 0.07 0.80
1994 20.65 7.97 0.75 0.29 3.77
1995 20.29 7.83 0.39 0.15 1.96
1996 19.74 7.62 -0.16 -0.06 -0.80
1997 19.43 7.50 -0.47 -0.18 -2.36
1998 20.31 7.84 0.41 0.16 2.06
1999 19.93 7.70 0.03 0.02 0.15
2000 19.70 7.61 -0.20 -0.07 -1.01
2001 20.68 7.98 0.78 0.30 3.92
2002 19.38 7.48 -0.52 -0.20 -2.61
2003 20.30 7.84 0.40 0.16 2.01
2004 19.86 7.67 -0.04 -0.01 -0.20
2005 19.21 7.42 -0.69 -0.26 -3.47
2006 17.87 6.90 -2.03 -0.78 -10.20
2007 18.74 7.24 -1.16 -0.44 -5.83
2008 20.96 8.09 1.06 0.41 5.33
2009 20.10 7.76 0.20 0.08 1.01
2010 19.14 7.39 -0.76 -0.29 -3.82
2011 18.19 7.02 -1.71 -0.66 -8.59
2012 20.26 7.82 0.36 0.14 1.81
2013 20.40 7.88 0.50 0.20 2.51
2014 20.06 7.75 0.16 0.07 0.80