Validation of sea ice concentration - Full domain
Bulletin date: 2025-11-06
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-10-31:
| 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 |
99341 |
11183 |
358 |
426 |
103 |
7 |
0 |
0 |
| OW |
1359 |
845 |
295 |
548 |
145 |
33 |
1 |
0 |
| VODI |
2825 |
207 |
246 |
679 |
564 |
325 |
109 |
0 |
| ODI |
0 |
33 |
46 |
279 |
631 |
1315 |
385 |
0 |
| CDI |
0 |
5 |
13 |
86 |
541 |
1837 |
910 |
11 |
| VCDI |
0 |
0 |
0 |
0 |
82 |
5891 |
30386 |
18760 |
|
...date precedes bulletin
|
Date: 2025-11-02:
| 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 |
99031 |
10922 |
322 |
435 |
35 |
0 |
0 |
0 |
| OW |
1296 |
1047 |
326 |
490 |
178 |
6 |
0 |
0 |
| VODI |
2977 |
361 |
200 |
469 |
607 |
96 |
7 |
0 |
| ODI |
0 |
69 |
66 |
275 |
691 |
558 |
360 |
5 |
| CDI |
0 |
28 |
28 |
119 |
708 |
1372 |
1276 |
9 |
| VCDI |
0 |
3 |
7 |
44 |
185 |
4398 |
28996 |
22808 |
|
...date precedes bulletin
|
Date: 2025-11-04:
| 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 |
98739 |
11144 |
373 |
504 |
77 |
0 |
0 |
0 |
| OW |
1270 |
1029 |
383 |
568 |
263 |
3 |
0 |
0 |
| VODI |
2992 |
106 |
156 |
548 |
563 |
63 |
0 |
0 |
| ODI |
0 |
11 |
32 |
254 |
687 |
254 |
15 |
0 |
| CDI |
0 |
5 |
8 |
70 |
774 |
1314 |
371 |
19 |
| VCDI |
0 |
2 |
3 |
15 |
187 |
6756 |
31577 |
19675 |
|
...date precedes bulletin
|
Date: 2025-11-06:
| 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 |
96824 |
11333 |
499 |
683 |
99 |
0 |
0 |
0 |
| OW |
1240 |
939 |
274 |
777 |
587 |
46 |
0 |
0 |
| VODI |
3015 |
191 |
156 |
445 |
753 |
247 |
0 |
0 |
| ODI |
0 |
35 |
64 |
224 |
519 |
318 |
13 |
2 |
| CDI |
0 |
3 |
14 |
153 |
476 |
1150 |
239 |
32 |
| VCDI |
0 |
0 |
0 |
13 |
390 |
5230 |
27557 |
26270 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
96823 |
11369 |
550 |
853 |
211 |
7 |
0 |
0 |
| OW |
1240 |
886 |
226 |
584 |
494 |
45 |
0 |
0 |
| VODI |
3016 |
199 |
143 |
442 |
710 |
225 |
0 |
0 |
| ODI |
0 |
43 |
67 |
237 |
465 |
321 |
6 |
2 |
| CDI |
0 |
4 |
21 |
165 |
528 |
1103 |
211 |
29 |
| VCDI |
0 |
0 |
0 |
14 |
416 |
5290 |
27592 |
26273 |
|
Date: 2025-11-08:
| 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 |
94237 |
11579 |
565 |
475 |
145 |
12 |
0 |
0 |
| OW |
1279 |
1450 |
400 |
974 |
500 |
174 |
0 |
0 |
| VODI |
3039 |
323 |
175 |
691 |
659 |
290 |
8 |
0 |
| ODI |
0 |
29 |
50 |
302 |
545 |
471 |
35 |
0 |
| CDI |
0 |
1 |
17 |
116 |
512 |
1186 |
424 |
10 |
| VCDI |
0 |
0 |
0 |
30 |
360 |
3934 |
28231 |
27582 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
94218 |
11797 |
612 |
657 |
225 |
32 |
0 |
0 |
| OW |
1296 |
1272 |
359 |
767 |
452 |
148 |
0 |
0 |
| VODI |
3041 |
291 |
178 |
629 |
604 |
297 |
2 |
0 |
| ODI |
0 |
22 |
48 |
330 |
468 |
481 |
40 |
0 |
| CDI |
0 |
0 |
10 |
175 |
591 |
1109 |
410 |
8 |
| VCDI |
0 |
0 |
0 |
30 |
381 |
4000 |
28246 |
27584 |
|
Date: 2025-11-10:
| 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 |
93019 |
12048 |
314 |
452 |
95 |
4 |
0 |
0 |
| OW |
1206 |
1563 |
408 |
604 |
159 |
1 |
0 |
0 |
| VODI |
3068 |
135 |
185 |
959 |
1000 |
87 |
0 |
0 |
| ODI |
0 |
1 |
17 |
213 |
1377 |
445 |
18 |
0 |
| CDI |
0 |
0 |
2 |
68 |
687 |
1355 |
143 |
35 |
| VCDI |
0 |
0 |
0 |
9 |
106 |
4005 |
27013 |
30009 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
92972 |
11812 |
386 |
618 |
241 |
27 |
0 |
0 |
| OW |
1257 |
1181 |
214 |
702 |
643 |
122 |
0 |
0 |
| VODI |
3064 |
640 |
211 |
464 |
927 |
402 |
10 |
0 |
| ODI |
0 |
86 |
82 |
264 |
520 |
393 |
78 |
0 |
| CDI |
0 |
26 |
29 |
230 |
785 |
826 |
318 |
37 |
| VCDI |
0 |
2 |
4 |
27 |
308 |
4127 |
26768 |
30007 |
|
Date: 2025-11-12:
| 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 |
90103 |
12564 |
345 |
332 |
84 |
9 |
0 |
0 |
| OW |
1158 |
1596 |
347 |
477 |
351 |
62 |
0 |
0 |
| VODI |
3093 |
1070 |
291 |
896 |
800 |
208 |
0 |
0 |
| ODI |
0 |
39 |
58 |
347 |
1010 |
765 |
15 |
0 |
| CDI |
0 |
1 |
7 |
112 |
534 |
1994 |
275 |
54 |
| VCDI |
0 |
0 |
1 |
25 |
113 |
4026 |
26407 |
31241 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
90065 |
12315 |
349 |
436 |
208 |
47 |
0 |
0 |
| OW |
1197 |
1436 |
229 |
420 |
572 |
194 |
1 |
0 |
| VODI |
3092 |
1210 |
291 |
665 |
807 |
643 |
21 |
0 |
| ODI |
0 |
278 |
127 |
436 |
577 |
617 |
87 |
3 |
| CDI |
0 |
26 |
44 |
190 |
572 |
1603 |
423 |
37 |
| VCDI |
0 |
5 |
9 |
42 |
156 |
3960 |
26165 |
31255 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
92516 |
9031 |
342 |
380 |
218 |
28 |
0 |
0 |
| OW |
1349 |
1433 |
143 |
244 |
313 |
278 |
3 |
0 |
| VODI |
3256 |
1599 |
276 |
605 |
694 |
721 |
37 |
0 |
| ODI |
21 |
513 |
135 |
384 |
519 |
718 |
163 |
0 |
| CDI |
0 |
78 |
40 |
120 |
415 |
1370 |
428 |
3 |
| VCDI |
0 |
48 |
34 |
98 |
261 |
4992 |
26818 |
30186 |
|
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