Ice climatology of the Arctic and Antarctic
Dansk version
The Arctic Today
Climate and Weather
- Mean temperatures
  North of 80N

- Arctic weather
  North of 60N

- Ice Extent in the
  Northern Hemisphere

- Minimum Ice Extent
  since 1979

- Monthly mean Sea Ice
  Extent since 1979

Satellite Products
- Sea ice drift and-
  sea ice concentration

- Sea Surface temp. and

- Ice temperatures
Climatological Sea Ice Atlas
Ice concentration
Monthly means
Monthly variations
Ice extent
Download ice edges
Break-up, freeze-up and open water days
Trend (significance)
Surface temperature
Sea ice
Land ice
Sea ice temperature and extent
Model Products
- Ice thickness and volume
- Ice and Ocean Forecasts
Seaice & Navigation
- Satellite Images
  around Greenland

This site has been updated with an extension of the input data record. Moreover, minor changes and improvements have been made:
  • The input data record has been extended from 2015 to 2022.
  • Climatology for the latest WMO's climate periode (1991-2020) has been calculated and added to ease comparison with other climatological products.
  • The statistical significance of trends has been re-calculated, due to errors in the previous version.
  • Plots and maps have been made bigger to show more details.
  • The statistics for the past 10 years has been removed, due to large statistical uncertainty.
More information of the applied data can be found here. The previous version of the climatology is still available here.

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.