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These maps show the monthly mean sea ice extents. These are defined as the extent of the monthly mean sea ice concentration which exceeds 30%. The maps are additionally overlayed with the corresponding multi-year montly mean of the periods 1978-2014 (left-hand side) og 2004-2014 (right-hand side)
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| What is ice concentration? Ice concentration is defined as the fractor of the sea surface which is covered by ice, where 100% corresponds to a complete ice cover and 0% corresponds to open waters. These maps are based on data from American satelites during the period from 1978 to 2014, which have been re-processed by by the European project: EUMETSAT OSI SAF. The sea ice typically reaches its maximum extent during March, extending approximately 14-16 million square kilometers, and its minimum extent by the end of september, which in the 1980's was approximately 7 million square kilometers compared to today's 3-5 million square kilometers. |
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Arctic |
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Antarctic |
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In order to document OSI-SAF's impact and enable ongoing support of OSI-SAF, you are obligated to acknowledge OSI-SAF in your work. Therefore, if you wish to use any material presented here please read this file.
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