| Year | 1965 | 1966 | 1967 | 1968 | 1969 | 1970 | 1971 | 1972 | 1973 | 1974 | 1975 | 1976 | 1977 | 1978 |
| Atmospheric air, % | 1.90 | 1.90 | 1.88 | 1.88 | 1.87 | 1.87 | 1.87 | 1.87 | 1.87 | 1.87 | 2.01 | 2.01 | 2.01 | 2.01 |
| Seawaters, % | 6.22 | 6.22 | 6.22 | 6.22 | 6.22 | 6.22 | 6.22 | 6.22 | 6.22 | 6.22 | 6.69 | 6.69 | 6.69 | 6.69 |
| Vegetated land, % | 1.29 | 1.29 | 1.29 | 1.29 | 1.29 | 1.29 | 1.29 | 1.29 | 1.29 | 1.29 | 1.39 | 1.39 | 1.39 | 1.39 |
| Glaciers, % | 3.28 | 3.28 | 3.28 | 3.28 | 3.28 | 3.28 | 3.28 | 3.28 | 3.28 | 3.28 | 3.53 | 3.53 | 3.53 | 3.53 |
| Sea Ice, % | 87.31 | 87.32 | 87.34 | 87.34 | 87.34 | 87.34 | 87.34 | 87.34 | 87.34 | 87.34 | 86.39 | 86.39 | 86.38 | 86.39 |
| Year | 1979 | 1980 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986 | 1987 | 1988 | 1989 | 1990 | 1991 | 1992 |
| Atmospheric air, % | 2.01 | 2.01 | 2.01 | 2.02 | 2.02 | 2.01 | 2.18 | 2.18 | 2.18 | 2.17 | 2.18 | 2.38 | 2.37 | 2.37 |
| Seawaters, % | 6.69 | 6.69 | 6.69 | 6.69 | 6.69 | 6.69 | 7.24 | 7.23 | 7.23 | 7.24 | 7.24 | 7.88 | 7.88 | 7.88 |
| Vegetated land, % | 1.39 | 1.39 | 1.39 | 1.39 | 1.39 | 1.39 | 1.50 | 1.50 | 1.50 | 1.50 | 1.50 | 1.63 | 1.63 | 1.63 |
| Glaciers, % | 3.53 | 3.53 | 3.53 | 3.53 | 3.53 | 3.53 | 3.81 | 3.81 | 3.81 | 3.81 | 3.81 | 4.15 | 4.15 | 4.15 |
| Sea Ice, % | 86.39 | 86.38 | 86.38 | 86.38 | 86.38 | 86.38 | 85.28 | 85.27 | 85.27 | 85.28 | 85.28 | 83.96 | 83.97 | 83.97 |
| Year | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 |
| Atmospheric air, % | 2.37 | 2.38 | 2.60 | 2.60 | 2.61 | 2.62 | 2.60 | 2.87 | 2.87 | 2.87 | 2.88 | 2.87 | 3.22 | 3.23 |
| Seawaters, % | 7.88 | 7.88 | 8.64 | 8.64 | 8.64 | 8.64 | 8.64 | 9.58 | 9.58 | 9.58 | 9.58 | 9.58 | 10.73 | 10.73 |
| Vegetated land, % | 1.63 | 1.63 | 1.79 | 1.79 | 1.79 | 1.79 | 1.79 | 1.99 | 1.99 | 1.99 | 1.99 | 1.99 | 2.23 | 2.22 |
| Glaciers, % | 4.15 | 4.15 | 4.55 | 4.56 | 4.55 | 4.55 | 4.56 | 5.05 | 5.05 | 5.05 | 5.05 | 5.05 | 5.66 | 5.66 |
| Sea Ice, % | 83.97 | 83.96 | 82.41 | 82.41 | 82.40 | 82.40 | 82.41 | 80.52 | 80.52 | 80.52 | 80.52 | 80.52 | 78.16 | 78.16 |
| Year | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 |
| Atmospheric air, % | 3.22 | 3.22 | 3.22 | 3.66 | 3.66 | 3.67 | 3.66 | 3.67 | 4.28 | 4.28 | 4.26 | 4.26 | 4.27 | 4.28 |
| Seawaters, % | 10.73 | 10.73 | 10.73 | 12.21 | 12.21 | 12.21 | 12.21 | 12.21 | 14.15 | 14.15 | 14.15 | 14.16 | 14.15 | 14.15 |
| Vegetated land, % | 2.23 | 2.23 | 2.23 | 2.53 | 2.53 | 2.53 | 2.53 | 2.53 | 2.93 | 2.93 | 2.93 | 2.93 | 2.93 | 2.93 |
| Glaciers, % | 5.66 | 5.66 | 5.66 | 6.43 | 6.43 | 6.43 | 6.44 | 6.43 | 7.46 | 7.46 | 7.46 | 7.46 | 7.46 | 7.46 |
| Sea Ice, % | 78.16 | 78.16 | 78.16 | 75.16 | 75.16 | 75.15 | 75.17 | 75.15 | 71.18 | 71.18 | 71.19 | 71.19 | 71.19 | 71.18 |