Description of algorithm
Interpretation of results
  Ice thickness stat.s ++
  Contingency tables

Validation of ice thickness - Full domain

Bulletin date: 2025-11-20

Data source: AWI SMOS sea ice thickness

Definition of categories:

Category   Sea ice thickness   
c1<0.3m
c20.3 - 0.6m
c30.6 - 1m
c4>1m

Model vs. SMOS observations, sea ice thickness contingency tables

Date: 2025-11-14:

Best estimate Forecast
observations
open c1 c2 c3 c4
m
o
d
e
l		 open 176427 15475 7 0 0
c1 684 19274 3178 551 0
c2 26 2783 6315 5992 0
c3 0 270 1523 3446 0
c4 6 431 538 1602 0
...date precedes bulletin

Date: 2025-11-16:

Best estimate Forecast
observations
open c1 c2 c3 c4
m
o
d
e
l		 open 179791 15294 39 0 0
c1 302 20343 2373 396 0
c2 32 3648 6980 5180 0
c3 16 427 1748 2646 0
c4 12 470 847 1664 0
...date precedes bulletin

Date: 2025-11-18:

Best estimate Forecast
observations
open c1 c2 c3 c4
m
o
d
e
l		 open 176230 15288 71 4 0
c1 571 22346 4369 661 0
c2 31 2491 5380 4197 0
c3 10 720 2288 2479 0
c4 6 545 1373 1858 0
...date precedes bulletin

Date: 2025-11-20:

Best estimate Forecast
observations
open c1 c2 c3 c4
m
o
d
e
l		 open 174357 14656 34 8 0
c1 1062 21996 5284 659 0
c2 82 2451 7461 8690 0
c3 32 736 1648 3594 0
c4 6 230 1018 2642 0
observations
open c1 c2 c3 c4
m
o
d
e
l		 open 174482 14756 79 10 0
c1 926 21871 5254 689 0
c2 94 2456 7334 8621 0
c3 31 737 1751 3630 0
c4 6 249 1027 2643 0

Date: 2025-11-22:

Best estimate Forecast
observations
open c1 c2 c3 c4
m
o
d
e
l		 open 172831 13631 15 4 0
c1 834 22494 5190 1086 0
c2 101 2061 4436 4223 0
c3 13 455 1399 4578 0
c4 6 128 1015 1901 0
observations
open c1 c2 c3 c4
m
o
d
e
l		 open 172951 13941 28 10 0
c1 713 22189 5251 1095 0
c2 97 2068 4352 4158 0
c3 18 428 1424 4629 0
c4 6 143 1000 1900 0

Date: 2025-11-24:

Best estimate Forecast
observations
open c1 c2 c3 c4
m
o
d
e
l		 open 173534 12650 9 0 0
c1 1022 23354 3149 476 0
c2 80 4803 8926 6886 0
c3 13 1137 2709 6078 0
c4 6 313 1195 1698 0
observations
open c1 c2 c3 c4
m
o
d
e
l		 open 173081 13080 19 0 0
c1 1460 23790 5065 1007 0
c2 92 3945 6886 6671 0
c3 16 1235 3064 5950 0
c4 6 207 954 1510 0

Date: 2025-11-26:

Best estimate Forecast
observations
open c1 c2 c3 c4
m
o
d
e
l		 open 183041 13186 8 0 0
c1 1205 20469 2592 478 0
c2 48 3569 9637 6132 0
c3 26 1312 2339 7137 0
c4 6 398 946 2604 0
observations
open c1 c2 c3 c4
m
o
d
e
l		 open 182721 13601 37 0 0
c1 1493 19866 4082 1146 0
c2 88 3341 7846 5430 0
c3 18 1882 2649 7423 0
c4 6 244 908 2352 0

Date: 2025-11-28:

Best estimate Forecast
observations
open c1 c2 c3 c4
m
o
d
e
l		 open 187207 14502 5 0 0
c1 1503 19279 3778 490 0
c2 309 4002 7064 4635 0
c3 207 1468 1429 4595 0
c4 6 658 673 1599 0
observations
open c1 c2 c3 c4
m
o
d
e
l		 open 186978 15094 2 0 0
c1 1668 18294 4513 864 0
c2 419 3925 6284 4700 0
c3 161 2134 1421 4188 0
c4 6 462 729 1567 0


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