On top of the maps contours are drawn indicating the confidence of the statistics (larger is better). Since the sea ice does not retreat and expand completely every year, not all areas experience the same number of freeze-ups and break-ups over an equal period of years. Therefore, some areas may experience relatively few freeze-ups and break-ups, thus reducing the confidence in the statistics of the area. This is illustrated by the contours overlayed the plots, indicating the percentage of years the statistic was able to be estimated from. In addition, only areas having more than 6 samples are considered for statistical robustness.
Click here to change between the full period and the wmo standard climate period.
|What is ice concentration? |
|Days of open water|| ||Freeze-up date|| ||Break-up date|
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.
This page is a result of the sea ice concentration climatology. To download a summary data set climatology click here.