Validation of sea ice concentration - Full domain
Bulletin date: 2025-11-27
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-11-21:
| 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 |
89696 |
10264 |
177 |
177 |
34 |
2 |
0 |
0 |
| OW |
1109 |
1647 |
252 |
318 |
129 |
20 |
0 |
0 |
| VODI |
3296 |
721 |
282 |
764 |
602 |
95 |
2 |
0 |
| ODI |
0 |
108 |
111 |
395 |
819 |
354 |
23 |
0 |
| CDI |
0 |
11 |
19 |
226 |
1018 |
1469 |
256 |
0 |
| VCDI |
0 |
20 |
26 |
80 |
505 |
6652 |
31029 |
28102 |
|
...date precedes bulletin
|
Date: 2025-11-23:
| 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 |
89155 |
9847 |
209 |
215 |
124 |
16 |
0 |
0 |
| OW |
1109 |
1120 |
171 |
317 |
159 |
54 |
1 |
0 |
| VODI |
3307 |
1134 |
243 |
580 |
509 |
238 |
1 |
0 |
| ODI |
0 |
233 |
136 |
389 |
701 |
505 |
51 |
0 |
| CDI |
0 |
31 |
39 |
239 |
812 |
1650 |
264 |
1 |
| VCDI |
0 |
29 |
30 |
73 |
327 |
5421 |
30022 |
31348 |
|
...date precedes bulletin
|
Date: 2025-11-25:
| 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 |
88154 |
10388 |
198 |
166 |
42 |
23 |
0 |
0 |
| OW |
1039 |
1492 |
321 |
382 |
77 |
27 |
0 |
0 |
| VODI |
3316 |
668 |
383 |
1020 |
380 |
25 |
13 |
0 |
| ODI |
0 |
65 |
75 |
409 |
789 |
208 |
25 |
0 |
| CDI |
0 |
23 |
39 |
181 |
925 |
1633 |
254 |
20 |
| VCDI |
0 |
2 |
11 |
47 |
280 |
5370 |
29582 |
32758 |
|
...date precedes bulletin
|
Date: 2025-11-27:
| 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 |
87492 |
10195 |
162 |
152 |
41 |
0 |
0 |
0 |
| OW |
1030 |
1607 |
306 |
331 |
179 |
35 |
0 |
0 |
| VODI |
3330 |
865 |
341 |
738 |
569 |
113 |
7 |
0 |
| ODI |
0 |
174 |
128 |
500 |
758 |
244 |
31 |
0 |
| CDI |
0 |
32 |
58 |
208 |
765 |
1300 |
165 |
0 |
| VCDI |
0 |
0 |
8 |
84 |
375 |
5618 |
32608 |
30261 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87491 |
10303 |
161 |
145 |
23 |
0 |
0 |
0 |
| OW |
1031 |
1525 |
320 |
327 |
181 |
38 |
0 |
0 |
| VODI |
3330 |
853 |
323 |
786 |
569 |
103 |
16 |
0 |
| ODI |
0 |
152 |
130 |
462 |
800 |
261 |
34 |
0 |
| CDI |
0 |
39 |
56 |
209 |
744 |
1332 |
170 |
0 |
| VCDI |
0 |
1 |
13 |
84 |
370 |
5576 |
32591 |
30261 |
|
Date: 2025-11-29:
| 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 |
85787 |
11027 |
268 |
235 |
97 |
12 |
0 |
0 |
| OW |
1118 |
1644 |
267 |
342 |
282 |
89 |
0 |
0 |
| VODI |
3344 |
1139 |
269 |
447 |
543 |
325 |
10 |
0 |
| ODI |
0 |
400 |
131 |
403 |
442 |
364 |
24 |
0 |
| CDI |
0 |
145 |
127 |
335 |
698 |
1040 |
112 |
0 |
| VCDI |
0 |
49 |
85 |
322 |
731 |
7493 |
30672 |
29992 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
85785 |
11209 |
293 |
255 |
104 |
19 |
0 |
0 |
| OW |
1113 |
1540 |
241 |
326 |
249 |
85 |
2 |
0 |
| VODI |
3351 |
1059 |
279 |
484 |
553 |
320 |
8 |
0 |
| ODI |
0 |
396 |
124 |
368 |
476 |
394 |
33 |
0 |
| CDI |
0 |
150 |
128 |
328 |
689 |
1018 |
108 |
0 |
| VCDI |
0 |
50 |
82 |
323 |
722 |
7487 |
30667 |
29992 |
|
Date: 2025-12-01:
| 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 |
82680 |
13747 |
216 |
210 |
16 |
2 |
0 |
0 |
| OW |
1039 |
2003 |
404 |
363 |
181 |
12 |
0 |
0 |
| VODI |
3346 |
645 |
249 |
761 |
492 |
49 |
0 |
0 |
| ODI |
0 |
117 |
46 |
332 |
901 |
237 |
1 |
0 |
| CDI |
0 |
91 |
47 |
172 |
827 |
2079 |
110 |
5 |
| VCDI |
0 |
160 |
69 |
168 |
325 |
8002 |
32907 |
27799 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
82602 |
13171 |
235 |
296 |
83 |
11 |
0 |
0 |
| OW |
1110 |
1656 |
253 |
380 |
370 |
65 |
0 |
0 |
| VODI |
3353 |
892 |
236 |
487 |
732 |
473 |
2 |
0 |
| ODI |
0 |
474 |
135 |
309 |
502 |
470 |
15 |
0 |
| CDI |
0 |
247 |
42 |
241 |
515 |
1298 |
204 |
13 |
| VCDI |
0 |
323 |
130 |
293 |
540 |
8064 |
32797 |
27791 |
|
Date: 2025-12-03:
| 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 |
81258 |
13950 |
275 |
211 |
30 |
0 |
0 |
0 |
| OW |
1010 |
1615 |
301 |
474 |
208 |
12 |
0 |
0 |
| VODI |
3363 |
467 |
307 |
684 |
748 |
119 |
2 |
0 |
| ODI |
0 |
92 |
73 |
427 |
844 |
350 |
1 |
0 |
| CDI |
0 |
41 |
64 |
291 |
789 |
1443 |
247 |
0 |
| VCDI |
0 |
6 |
6 |
294 |
621 |
6020 |
33106 |
31061 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
81259 |
13339 |
248 |
245 |
70 |
1 |
0 |
0 |
| OW |
1005 |
1577 |
255 |
426 |
309 |
77 |
2 |
0 |
| VODI |
3367 |
763 |
242 |
467 |
646 |
272 |
0 |
0 |
| ODI |
0 |
221 |
156 |
462 |
758 |
511 |
20 |
0 |
| CDI |
0 |
203 |
83 |
448 |
737 |
1183 |
359 |
0 |
| VCDI |
0 |
68 |
42 |
333 |
720 |
5900 |
32975 |
31061 |
|
Date: 2025-12-05:
| 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 |
79555 |
13966 |
241 |
207 |
47 |
0 |
0 |
0 |
| OW |
1033 |
1611 |
305 |
534 |
194 |
49 |
0 |
0 |
| VODI |
2903 |
436 |
282 |
701 |
538 |
178 |
5 |
0 |
| ODI |
479 |
76 |
79 |
489 |
968 |
247 |
5 |
0 |
| CDI |
0 |
15 |
18 |
300 |
1341 |
1227 |
376 |
0 |
| VCDI |
0 |
5 |
2 |
84 |
1050 |
5111 |
32611 |
33542 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
79287 |
13128 |
242 |
305 |
99 |
4 |
0 |
0 |
| OW |
1293 |
2039 |
238 |
483 |
250 |
111 |
4 |
0 |
| VODI |
2861 |
749 |
273 |
525 |
552 |
208 |
9 |
1 |
| ODI |
529 |
130 |
119 |
428 |
801 |
440 |
31 |
8 |
| CDI |
0 |
47 |
40 |
376 |
1090 |
1037 |
314 |
56 |
| VCDI |
0 |
16 |
15 |
198 |
1346 |
5012 |
32639 |
33477 |
|
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