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 27.03 10.44 -0.26 -0.10 -0.95
1980 28.40 10.97 1.11 0.43 4.07
1981 27.53 10.63 0.24 0.09 0.88
1982 27.93 10.78 0.64 0.24 2.35
1983 27.95 10.79 0.66 0.25 2.42
1984 27.87 10.76 0.58 0.22 2.13
1985 27.80 10.73 0.51 0.19 1.87
1986 27.32 10.55 0.03 0.01 0.11
1987 27.34 10.56 0.05 0.02 0.18
1988 28.30 10.93 1.01 0.39 3.70
1989 27.58 10.65 0.29 0.11 1.06
1990 27.32 10.55 0.03 0.01 0.11
1991 27.17 10.49 -0.12 -0.05 -0.44
1992 28.13 10.86 0.84 0.32 3.08
1993 28.13 10.86 0.84 0.32 3.08
1994 27.71 10.70 0.42 0.16 1.54
1995 26.94 10.40 -0.35 -0.14 -1.28
1996 26.92 10.39 -0.37 -0.15 -1.36
1997 27.16 10.49 -0.13 -0.05 -0.48
1998 27.39 10.58 0.10 0.04 0.37
1999 27.31 10.54 0.02 0.00 0.07
2000 26.77 10.34 -0.52 -0.20 -1.91
2001 26.68 10.30 -0.61 -0.24 -2.24
2002 26.69 10.31 -0.60 -0.23 -2.20
2003 26.82 10.36 -0.47 -0.18 -1.72
2004 27.22 10.51 -0.07 -0.03 -0.26
2005 27.25 10.52 -0.04 -0.02 -0.15
2006 26.60 10.27 -0.69 -0.27 -2.53
2007 26.29 10.15 -1.00 -0.39 -3.66
2008 27.21 10.51 -0.08 -0.03 -0.29
2009 26.64 10.29 -0.65 -0.25 -2.38
2010 26.82 10.36 -0.47 -0.18 -1.72
2011 26.20 10.12 -1.09 -0.42 -3.99
2012 26.60 10.27 -0.69 -0.27 -2.53
2013 27.45 10.60 0.16 0.06 0.59
2014 26.99 10.42 -0.30 -0.12 -1.10