Validation of sea ice concentration - Full domain
Bulletin date: 2025-12-04
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-11-28:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87043 |
10141 |
196 |
230 |
41 |
0 |
0 |
0 |
| OW |
1087 |
1665 |
246 |
363 |
208 |
44 |
0 |
0 |
| VODI |
3346 |
1048 |
355 |
593 |
472 |
246 |
9 |
0 |
| ODI |
0 |
210 |
164 |
538 |
615 |
325 |
8 |
0 |
| CDI |
0 |
77 |
55 |
256 |
767 |
1069 |
72 |
5 |
| VCDI |
0 |
37 |
28 |
167 |
616 |
6431 |
31977 |
30060 |
|
...date precedes bulletin
|
Date: 2025-11-30:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
84731 |
11598 |
275 |
332 |
71 |
13 |
0 |
0 |
| OW |
1157 |
1556 |
307 |
414 |
280 |
104 |
0 |
0 |
| VODI |
3342 |
1061 |
209 |
503 |
491 |
523 |
12 |
0 |
| ODI |
0 |
463 |
139 |
306 |
360 |
413 |
25 |
0 |
| CDI |
0 |
226 |
79 |
306 |
494 |
1232 |
167 |
7 |
| VCDI |
0 |
236 |
102 |
320 |
623 |
8079 |
29956 |
30298 |
|
...date precedes bulletin
|
Date: 2025-12-02:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
82527 |
13408 |
195 |
203 |
31 |
0 |
0 |
0 |
| OW |
1042 |
1827 |
299 |
453 |
181 |
1 |
0 |
0 |
| VODI |
3351 |
554 |
307 |
704 |
692 |
57 |
3 |
0 |
| ODI |
0 |
187 |
50 |
335 |
793 |
283 |
0 |
0 |
| CDI |
0 |
106 |
47 |
245 |
863 |
1554 |
252 |
7 |
| VCDI |
0 |
93 |
82 |
251 |
479 |
7305 |
31575 |
30468 |
|
...date precedes bulletin
|
Date: 2025-12-04:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
80327 |
14145 |
210 |
203 |
35 |
0 |
0 |
0 |
| OW |
1038 |
1473 |
339 |
528 |
181 |
27 |
0 |
0 |
| VODI |
3093 |
395 |
302 |
750 |
608 |
202 |
2 |
0 |
| ODI |
281 |
72 |
76 |
431 |
986 |
323 |
5 |
0 |
| CDI |
0 |
13 |
53 |
251 |
1020 |
1387 |
267 |
0 |
| VCDI |
0 |
0 |
3 |
231 |
839 |
5189 |
33775 |
31750 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
80316 |
14195 |
222 |
231 |
36 |
0 |
0 |
0 |
| OW |
1049 |
1468 |
343 |
545 |
214 |
39 |
0 |
0 |
| VODI |
3122 |
356 |
290 |
729 |
627 |
207 |
2 |
0 |
| ODI |
252 |
64 |
73 |
392 |
927 |
334 |
7 |
0 |
| CDI |
0 |
15 |
52 |
252 |
1059 |
1376 |
287 |
0 |
| VCDI |
0 |
0 |
3 |
245 |
806 |
5172 |
33753 |
31750 |
|
Date: 2025-12-06:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
79112 |
13667 |
243 |
250 |
85 |
5 |
0 |
0 |
| OW |
1047 |
1763 |
271 |
424 |
229 |
43 |
0 |
0 |
| VODI |
2820 |
669 |
313 |
628 |
406 |
195 |
1 |
0 |
| ODI |
573 |
92 |
96 |
534 |
758 |
296 |
6 |
0 |
| CDI |
0 |
26 |
43 |
295 |
1388 |
1450 |
308 |
0 |
| VCDI |
0 |
4 |
4 |
27 |
900 |
5341 |
34418 |
32080 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
79083 |
13833 |
270 |
289 |
102 |
5 |
0 |
0 |
| OW |
1077 |
1662 |
249 |
400 |
223 |
51 |
0 |
0 |
| VODI |
2835 |
614 |
320 |
666 |
481 |
192 |
1 |
0 |
| ODI |
557 |
92 |
88 |
507 |
755 |
344 |
9 |
0 |
| CDI |
0 |
18 |
35 |
253 |
1272 |
1472 |
336 |
0 |
| VCDI |
0 |
2 |
8 |
43 |
933 |
5266 |
34387 |
32080 |
|
Date: 2025-12-08:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
78384 |
13857 |
353 |
336 |
119 |
27 |
0 |
0 |
| OW |
1155 |
1510 |
207 |
402 |
237 |
50 |
3 |
0 |
| VODI |
2729 |
689 |
253 |
448 |
407 |
118 |
8 |
0 |
| ODI |
701 |
205 |
148 |
433 |
600 |
232 |
44 |
0 |
| CDI |
0 |
47 |
71 |
286 |
879 |
1229 |
275 |
3 |
| VCDI |
0 |
20 |
30 |
156 |
1187 |
6119 |
28712 |
38141 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
78356 |
13321 |
330 |
301 |
119 |
30 |
0 |
0 |
| OW |
1171 |
1794 |
178 |
382 |
234 |
57 |
3 |
0 |
| VODI |
2739 |
867 |
298 |
486 |
385 |
104 |
7 |
0 |
| ODI |
703 |
281 |
163 |
486 |
715 |
300 |
36 |
0 |
| CDI |
0 |
52 |
62 |
254 |
838 |
1350 |
253 |
1 |
| VCDI |
0 |
13 |
31 |
152 |
1138 |
5934 |
28743 |
38143 |
|
Date: 2025-12-10:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
77380 |
14973 |
289 |
191 |
67 |
28 |
0 |
0 |
| OW |
1127 |
1331 |
264 |
420 |
164 |
34 |
0 |
0 |
| VODI |
2627 |
402 |
254 |
602 |
363 |
88 |
5 |
0 |
| ODI |
802 |
31 |
56 |
425 |
625 |
221 |
25 |
0 |
| CDI |
0 |
7 |
11 |
198 |
909 |
1420 |
388 |
0 |
| VCDI |
0 |
3 |
4 |
38 |
715 |
5464 |
33245 |
35614 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
77264 |
13396 |
278 |
261 |
94 |
34 |
0 |
0 |
| OW |
1188 |
1632 |
139 |
290 |
290 |
50 |
3 |
0 |
| VODI |
2630 |
1250 |
211 |
416 |
332 |
101 |
19 |
0 |
| ODI |
854 |
412 |
185 |
511 |
531 |
302 |
34 |
0 |
| CDI |
0 |
53 |
57 |
298 |
782 |
1129 |
366 |
11 |
| VCDI |
0 |
4 |
8 |
98 |
814 |
5639 |
33241 |
35603 |
|
Date: 2025-12-12:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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