Validation of sea ice concentration - Full domain
Bulletin date: 2025-11-20
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-11-14:
| 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 |
92609 |
9410 |
345 |
290 |
73 |
0 |
0 |
0 |
| OW |
1370 |
1565 |
192 |
383 |
287 |
23 |
0 |
0 |
| VODI |
3163 |
1362 |
291 |
612 |
632 |
245 |
0 |
0 |
| ODI |
0 |
332 |
96 |
389 |
637 |
641 |
13 |
0 |
| CDI |
0 |
23 |
38 |
94 |
527 |
1935 |
316 |
11 |
| VCDI |
0 |
10 |
8 |
63 |
264 |
5263 |
27120 |
30178 |
|
...date precedes bulletin
|
Date: 2025-11-16:
| 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 |
92515 |
9410 |
297 |
263 |
23 |
2 |
0 |
0 |
| OW |
1404 |
1462 |
286 |
489 |
342 |
34 |
0 |
0 |
| VODI |
3422 |
707 |
219 |
573 |
732 |
275 |
1 |
0 |
| ODI |
0 |
158 |
107 |
313 |
596 |
428 |
21 |
0 |
| CDI |
0 |
31 |
35 |
274 |
963 |
1308 |
161 |
11 |
| VCDI |
0 |
17 |
20 |
63 |
541 |
9187 |
28415 |
25705 |
|
...date precedes bulletin
|
Date: 2025-11-18:
| 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 |
90700 |
11023 |
318 |
305 |
72 |
9 |
0 |
0 |
| OW |
1260 |
1275 |
301 |
435 |
178 |
17 |
0 |
0 |
| VODI |
3270 |
371 |
209 |
596 |
802 |
139 |
1 |
0 |
| ODI |
0 |
113 |
71 |
296 |
788 |
397 |
22 |
0 |
| CDI |
0 |
24 |
13 |
123 |
876 |
1978 |
240 |
0 |
| VCDI |
0 |
0 |
1 |
35 |
528 |
9209 |
28857 |
25958 |
|
...date precedes bulletin
|
Date: 2025-11-20:
| 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 |
89823 |
10809 |
228 |
204 |
42 |
0 |
0 |
0 |
| OW |
1227 |
1414 |
255 |
353 |
127 |
11 |
0 |
0 |
| VODI |
3286 |
706 |
225 |
651 |
574 |
128 |
0 |
0 |
| ODI |
0 |
139 |
108 |
387 |
755 |
445 |
19 |
0 |
| CDI |
0 |
38 |
35 |
186 |
734 |
1714 |
269 |
1 |
| VCDI |
0 |
44 |
17 |
51 |
298 |
8006 |
30356 |
27145 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89861 |
10812 |
253 |
230 |
38 |
0 |
0 |
0 |
| OW |
1184 |
1393 |
240 |
357 |
133 |
7 |
0 |
0 |
| VODI |
3291 |
714 |
215 |
635 |
597 |
126 |
0 |
0 |
| ODI |
0 |
154 |
113 |
378 |
771 |
431 |
13 |
0 |
| CDI |
0 |
30 |
34 |
190 |
721 |
1776 |
282 |
0 |
| VCDI |
0 |
47 |
13 |
42 |
270 |
7964 |
30349 |
27146 |
|
Date: 2025-11-22:
| 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 |
89397 |
10037 |
245 |
208 |
24 |
7 |
0 |
0 |
| OW |
1113 |
1122 |
192 |
386 |
125 |
23 |
5 |
0 |
| VODI |
3298 |
1092 |
288 |
657 |
672 |
138 |
7 |
0 |
| ODI |
0 |
134 |
124 |
384 |
714 |
486 |
31 |
0 |
| CDI |
0 |
16 |
24 |
219 |
798 |
1687 |
327 |
8 |
| VCDI |
0 |
36 |
31 |
80 |
396 |
5774 |
31824 |
28681 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89408 |
10110 |
249 |
232 |
35 |
13 |
5 |
0 |
| OW |
1103 |
1076 |
210 |
414 |
121 |
8 |
5 |
0 |
| VODI |
3297 |
1046 |
276 |
628 |
668 |
132 |
7 |
0 |
| ODI |
0 |
148 |
108 |
367 |
736 |
542 |
13 |
0 |
| CDI |
0 |
22 |
32 |
213 |
771 |
1688 |
270 |
7 |
| VCDI |
0 |
35 |
29 |
80 |
398 |
5732 |
31894 |
28682 |
|
Date: 2025-11-24:
| 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 |
88784 |
10069 |
194 |
180 |
64 |
21 |
0 |
0 |
| OW |
1068 |
1754 |
345 |
278 |
75 |
29 |
0 |
0 |
| VODI |
3311 |
343 |
355 |
1052 |
394 |
54 |
5 |
0 |
| ODI |
0 |
19 |
19 |
322 |
1024 |
231 |
17 |
0 |
| CDI |
0 |
6 |
17 |
101 |
1026 |
2007 |
193 |
13 |
| VCDI |
0 |
8 |
11 |
18 |
259 |
5464 |
29518 |
32162 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88730 |
9922 |
274 |
286 |
128 |
76 |
5 |
0 |
| OW |
1105 |
1010 |
164 |
305 |
158 |
63 |
9 |
0 |
| VODI |
3328 |
961 |
279 |
602 |
550 |
160 |
31 |
0 |
| ODI |
0 |
237 |
150 |
465 |
695 |
372 |
43 |
0 |
| CDI |
0 |
43 |
47 |
214 |
941 |
1496 |
243 |
15 |
| VCDI |
0 |
26 |
27 |
79 |
370 |
5639 |
29402 |
32160 |
|
Date: 2025-11-26:
| 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 |
87762 |
10320 |
176 |
176 |
39 |
36 |
2 |
0 |
| OW |
1040 |
1525 |
335 |
348 |
123 |
28 |
9 |
0 |
| VODI |
3322 |
778 |
359 |
838 |
524 |
52 |
20 |
0 |
| ODI |
0 |
85 |
105 |
479 |
795 |
167 |
28 |
0 |
| CDI |
0 |
33 |
52 |
199 |
802 |
1541 |
235 |
0 |
| VCDI |
0 |
0 |
3 |
63 |
332 |
5315 |
29918 |
32846 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87709 |
10330 |
230 |
257 |
92 |
66 |
18 |
0 |
| OW |
1064 |
1088 |
250 |
350 |
210 |
41 |
24 |
0 |
| VODI |
3351 |
816 |
262 |
519 |
504 |
85 |
45 |
0 |
| ODI |
0 |
371 |
174 |
610 |
665 |
321 |
53 |
0 |
| CDI |
0 |
114 |
80 |
250 |
751 |
1330 |
281 |
1 |
| VCDI |
0 |
22 |
34 |
117 |
393 |
5296 |
29791 |
32845 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
86978 |
10334 |
287 |
344 |
123 |
19 |
0 |
0 |
| OW |
1098 |
1189 |
198 |
383 |
312 |
150 |
2 |
0 |
| VODI |
3398 |
947 |
243 |
446 |
449 |
291 |
11 |
0 |
| ODI |
2 |
373 |
160 |
468 |
551 |
369 |
28 |
0 |
| CDI |
0 |
234 |
97 |
260 |
630 |
1143 |
175 |
15 |
| VCDI |
0 |
101 |
59 |
246 |
654 |
6143 |
31850 |
30050 |
|
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