Arctic Sea Ice Extent
The Northern Hemisphere Sea Ice coverage
Dansk version

Northern Hemisphere Sea Ice extent

  Monthly mean sea ice extent in the Northern Hemisphere since 1979. The ice extent values are calculated from the latest reprocessed ice concentration data set (OSI-409), from The Ocean and Sea Ice, Satellite Application Facility (OSISAF). Ice extent corresponds to the area where ice concentration is greater than 15%. The most recent ice extend values are calculated from an interim ice concentration climate data set (OSI-430). The interim data close the gap between the latest reprocessed ice concentration data set and today. The interim sea ice extent values will be replaced by certified climate data records when new climate data are calculated. The monthly mean sea ice extent product is generated by Copernicus Marine environment monitoring service based on OSISAF ice concentration data. You can find the data here and the data are presented graphically here.

  Possible differences between this sea ice extent estimate and other estimates are most likely caused by differences in the applied algorithms and in the definition of ice extent.


Sea Ice Extent - monthly mean values (Mill.km2) >

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1979
15.84
16.57
16.85
16.04
14.60
13.43
11.55
9.15
8.00
8.00
11.68
13.85
1980
15.59
16.47
16.51
15.95
14.50
13.02
11.28
9.35
8.75
10.06
12.14
14.22
1981
15.43
16.08
16.14
15.66
14.43
13.29
11.61
9.28
8.17
9.71
11.78
14.08
1982
15.72
16.46
16.53
16.01
14.58
13.33
11.61
9.23
8.22
10.12
12.18
14.16
1983
15.45
16.42
16.53
15.72
14.05
13.05
11.80
9.54
8.46
10.01
12.04
13.85
1984
14.91
15.67
15.98
15.44
14.07
12.82
11.12
9.16
7.88
9.23
11.56
13.49
1985
15.11
15.83
16.32
15.75
14.58
13.03
11.07
8.68
7.80
9.40
11.69
13.72
1986
15.27
16.21
16.30
-
-
12.78
11.15
9.02
8.14
10.25
12.08
13.81
1987
15.51
16.45
16.17
15.59
14.26
13.15
11.33
8.64
8.15
9.74
11.89
13.13
1988
15.57
16.00
16.35
15.50
13.93
12.58
10.86
8.89
8.16
9.82
12.00
14.10
1989
15.37
15.89
15.86
14.74
13.38
12.85
11.15
8.78
7.75
9.55
11.66
13.91
1990
15.14
16.00
16.34
15.12
13.61
12.27
10.49
7.83
6.94
9.01
11.76
13.57
1991
14.79
15.65
15.80
15.29
13.86
12.69
10.61
8.43
7.24
9.25
11.47
13.53
1992
15.30
15.97
16.04
15.17
13.64
12.77
11.14
8.73
8.24
10.02
12.07
14.04
1993
15.46
16.14
16.22
15.54
13.81
12.49
10.77
8.48
7.32
9.57
12.12
13.93
1994
15.19
16.02
15.97
15.27
14.14
12.68
10.99
8.77
8.02
9.65
11.72
13.88
1995
15.06
15.64
15.66
14.94
13.45
12.17
10.08
7.78
6.82
8.60
11.40
13.46
1996
14.61
15.55
15.53
14.65
13.47
12.60
11.11
9.17
8.42
9.76
11.08
13.47
1997
14.97
15.86
15.90
15.01
13.59
12.36
10.41
8.13
7.42
9.07
11.40
13.69
1998
15.12
16.10
16.02
15.26
13.99
12.33
10.47
8.65
7.50
9.18
11.18
13.47
1999
14.84
15.66
15.71
15.41
14.19
12.49
10.35
8.46
7.18
9.40
11.52
13.29
2000
14.72
15.61
15.64
14.93
13.57
12.22
10.56
8.21
7.28
9.20
11.11
13.37
2001
14.76
15.68
15.85
15.16
13.96
12.11
9.91
8.35
7.59
9.04
11.40
13.29
2002
14.89
15.77
15.75
14.69
13.41
12.16
10.37
7.65
6.59
8.84
10.96
13.12
2003
14.78
15.55
15.84
14.89
13.39
12.15
10.20
7.87
6.89
8.57
10.72
13.15
2004
14.43
15.27
15.31
14.36
12.90
11.91
10.29
7.76
6.64
8.55
11.01
13.08
2005
14.04
14.77
15.04
14.38
13.22
11.71
9.75
7.09
6.19
8.12
10.80
12.76
2006
13.91
14.67
14.77
14.22
12.95
11.50
9.36
7.29
6.56
8.22
10.24
12.54
2007
14.14
14.91
14.91
14.27
13.12
11.73
8.81
6.15
4.96
6.87
10.38
12.62
2008
14.24
15.27
15.44
14.63
13.29
11.68
9.44
6.74
5.39
7.98
10.82
12.76
2009
14.22
15.06
15.26
14.74
13.52
11.79
9.24
6.90
5.89
7.51
10.24
12.58
2010
13.95
14.79
15.37
14.97
13.22
11.09
9.04
6.77
5.60
7.56
10.08
12.20
2011
13.73
14.56
14.83
14.40
13.04
11.16
8.60
6.27
5.23
7.07
10.20
12.60
2012
14.03
14.85
15.45
14.91
13.34
11.19
8.47
5.45
4.22
6.48
9.85
12.41
2013
14.07
15.00
15.27
14.62
13.45
11.93
9.10
6.87
5.86
8.11
10.53
12.62
2014
14.02
14.74
15.12
14.42
13.10
11.68
9.09
6.82
5.95
7.75
10.65
12.75
2015
13.92
14.70
14.71
14.30
12.89
11.46
9.44
6.85
5.49
7.75
10.51
12.55
2016
13.89
14.61
14.88
14.12
12.44
11.12
9.00
6.44
5.39
6.95
9.41
12.13
2017
13.75
14.60
14.71
14.14
13.04
11.49
9.07






  Monthly mean Sea Ice Extent since 1979, in the Northern Hemisphere. Ice Extent values are calculated from the latest OSI SAF climate data record and from an interim ice concentration climate product (see links to the left). The interim ice extent values fill in the gap between the latest update of the OSI SAF climate data set, and today. The monthly record-low values are red and the corresponding record-high values are green.