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 18.03 6.96 -0.30 -0.12 -1.64
1980 18.90 7.30 0.57 0.22 3.11
1981 18.54 7.16 0.21 0.08 1.15
1982 18.00 6.95 -0.33 -0.13 -1.80
1983 18.11 6.99 -0.22 -0.09 -1.20
1984 17.75 6.85 -0.58 -0.23 -3.16
1985 18.42 7.11 0.09 0.03 0.49
1986 17.61 6.80 -0.72 -0.28 -3.93
1987 18.01 6.95 -0.32 -0.13 -1.75
1988 18.60 7.18 0.27 0.10 1.47
1989 18.03 6.96 -0.30 -0.12 -1.64
1990 18.18 7.02 -0.15 -0.06 -0.82
1991 18.20 7.03 -0.13 -0.05 -0.71
1992 18.22 7.03 -0.11 -0.05 -0.60
1993 18.38 7.10 0.05 0.02 0.27
1994 18.26 7.05 -0.07 -0.03 -0.38
1995 18.30 7.07 -0.03 -0.01 -0.16
1996 18.17 7.02 -0.16 -0.06 -0.87
1997 18.14 7.00 -0.19 -0.08 -1.04
1998 18.82 7.27 0.49 0.19 2.67
1999 18.73 7.23 0.40 0.15 2.18
2000 18.46 7.13 0.13 0.05 0.71
2001 18.08 6.98 -0.25 -0.10 -1.36
2002 18.17 7.02 -0.16 -0.06 -0.87
2003 18.37 7.09 0.04 0.01 0.22
2004 18.57 7.17 0.24 0.09 1.31
2005 18.70 7.22 0.37 0.14 2.02
2006 18.99 7.33 0.66 0.25 3.60
2007 18.68 7.21 0.35 0.13 1.91
2008 18.08 6.98 -0.25 -0.10 -1.36
2009 18.60 7.18 0.27 0.10 1.47
2010 18.83 7.27 0.50 0.19 2.73
2011 18.54 7.16 0.21 0.08 1.15
2012 18.92 7.31 0.59 0.23 3.22
2013 19.43 7.50 1.10 0.42 6.00