Results for 2021
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Sea ice concentration vs. ice chart data
Ice chart definitions
Timeseries
| Quarter 1 | Quarter 2 | Quarter 3 | Quarter 4 |
| Week 1 | Week 7 |
| Week 2 | Week 8 |
| Week 3 | Week 9 |
| Week 4 | Week 10 |
| Week 5 | Week 11 |
| Week 6 |
Sea ice concentration, root-mean-square difference, Nordic 4km
Ice edge position, root-mean-square difference, Nordic 4km
Sea ice extent (no. grids), Nordic 4km
Extent, marginal ice zone (no. grids), Nordic 4km
Sea ice concentration, root-mean-square difference, Arctic 20km
Ice edge position, root-mean-square difference, Arctic 20km
Sea ice extent (no. grids), Arctic 20km
Extent, marginal ice zone (no. grids), Arctic 20km
