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 15.87 6.13 -0.43 -0.16 -2.64
1980 16.71 6.45 0.41 0.16 2.52
1981 16.36 6.32 0.06 0.03 0.37
1982 16.02 6.19 -0.28 -0.10 -1.72
1983 16.31 6.30 0.01 0.01 0.06
1984 16.58 6.40 0.28 0.11 1.72
1985 16.41 6.34 0.11 0.05 0.67
1986 15.54 6.00 -0.76 -0.29 -4.66
1987 15.82 6.11 -0.48 -0.18 -2.94
1988 16.61 6.41 0.31 0.12 1.90
1989 16.08 6.21 -0.22 -0.08 -1.35
1990 16.01 6.18 -0.29 -0.11 -1.78
1991 16.05 6.20 -0.25 -0.09 -1.53
1992 16.26 6.28 -0.04 -0.01 -0.25
1993 16.40 6.33 0.10 0.04 0.61
1994 16.41 6.34 0.11 0.05 0.67
1995 15.97 6.17 -0.33 -0.12 -2.02
1996 16.36 6.32 0.06 0.03 0.37
1997 16.25 6.27 -0.05 -0.02 -0.31
1998 16.64 6.42 0.34 0.13 2.09
1999 16.32 6.30 0.02 0.01 0.12
2000 16.23 6.27 -0.07 -0.02 -0.43
2001 15.76 6.08 -0.54 -0.21 -3.31
2002 15.91 6.14 -0.39 -0.15 -2.39
2003 16.53 6.38 0.23 0.09 1.41
2004 16.57 6.40 0.27 0.11 1.66
2005 16.78 6.48 0.48 0.19 2.94
2006 16.76 6.47 0.46 0.18 2.82
2007 16.24 6.27 -0.06 -0.02 -0.37
2008 16.59 6.41 0.29 0.12 1.78
2009 16.37 6.32 0.07 0.03 0.43
2010 16.94 6.54 0.64 0.25 3.93
2011 16.20 6.25 -0.10 -0.04 -0.61
2012 16.68 6.44 0.38 0.15 2.33
2013 17.16 6.63 0.86 0.34 5.28