Validation of sea ice concentration - American sector
Bulletin date: 2025-11-06
Data source: OSI SAF N.H. multi-product 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 |
25527 |
3709 |
284 |
424 |
79 |
0 |
0 |
0 |
| OW |
0 |
155 |
137 |
626 |
117 |
0 |
0 |
0 |
| VODI |
3 |
5 |
19 |
420 |
342 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
137 |
529 |
97 |
1 |
0 |
| CDI |
0 |
0 |
0 |
18 |
512 |
629 |
72 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
67 |
1383 |
8245 |
17693 |
|
...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 |
25391 |
3641 |
242 |
563 |
27 |
0 |
0 |
0 |
| OW |
22 |
325 |
165 |
469 |
139 |
0 |
0 |
0 |
| VODI |
4 |
52 |
63 |
447 |
367 |
10 |
0 |
0 |
| ODI |
0 |
2 |
18 |
213 |
407 |
68 |
0 |
0 |
| CDI |
0 |
0 |
0 |
100 |
532 |
348 |
16 |
2 |
| VCDI |
0 |
0 |
0 |
15 |
256 |
1651 |
6729 |
18947 |
|
...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 |
24415 |
4038 |
417 |
748 |
44 |
0 |
0 |
0 |
| OW |
37 |
348 |
214 |
608 |
160 |
0 |
0 |
0 |
| VODI |
10 |
15 |
25 |
501 |
394 |
4 |
0 |
0 |
| ODI |
0 |
0 |
0 |
155 |
512 |
62 |
0 |
0 |
| CDI |
0 |
0 |
0 |
29 |
477 |
460 |
24 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
155 |
1875 |
8583 |
16920 |
|
...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 |
24013 |
3555 |
342 |
774 |
51 |
2 |
0 |
0 |
| OW |
29 |
205 |
128 |
774 |
486 |
9 |
0 |
0 |
| VODI |
8 |
17 |
41 |
393 |
669 |
56 |
0 |
0 |
| ODI |
0 |
0 |
0 |
160 |
470 |
116 |
0 |
0 |
| CDI |
0 |
0 |
0 |
35 |
450 |
362 |
49 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
397 |
1869 |
8174 |
17592 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24015 |
3563 |
355 |
906 |
128 |
8 |
0 |
0 |
| OW |
26 |
183 |
125 |
583 |
368 |
11 |
0 |
0 |
| VODI |
9 |
31 |
31 |
447 |
640 |
47 |
0 |
0 |
| ODI |
0 |
0 |
0 |
166 |
450 |
119 |
1 |
0 |
| CDI |
0 |
0 |
0 |
36 |
514 |
346 |
49 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
423 |
1883 |
8173 |
17592 |
|
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 |
23742 |
3344 |
292 |
492 |
49 |
0 |
0 |
0 |
| OW |
41 |
224 |
134 |
826 |
465 |
65 |
0 |
0 |
| VODI |
12 |
76 |
52 |
558 |
492 |
172 |
0 |
0 |
| ODI |
0 |
1 |
9 |
205 |
452 |
170 |
12 |
0 |
| CDI |
0 |
0 |
0 |
73 |
461 |
473 |
117 |
1 |
| VCDI |
0 |
0 |
0 |
16 |
312 |
1776 |
7627 |
18490 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23726 |
3425 |
328 |
698 |
82 |
18 |
0 |
0 |
| OW |
55 |
150 |
102 |
594 |
413 |
48 |
0 |
0 |
| VODI |
14 |
70 |
57 |
514 |
447 |
153 |
0 |
0 |
| ODI |
0 |
0 |
0 |
253 |
401 |
186 |
15 |
0 |
| CDI |
0 |
0 |
0 |
103 |
555 |
467 |
124 |
1 |
| VCDI |
0 |
0 |
0 |
8 |
333 |
1784 |
7617 |
18490 |
|
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 |
23624 |
2914 |
290 |
662 |
129 |
8 |
0 |
0 |
| OW |
41 |
272 |
102 |
464 |
512 |
56 |
0 |
0 |
| VODI |
16 |
91 |
70 |
380 |
564 |
174 |
6 |
0 |
| ODI |
1 |
15 |
16 |
120 |
462 |
212 |
22 |
0 |
| CDI |
0 |
1 |
10 |
80 |
648 |
401 |
97 |
4 |
| VCDI |
0 |
0 |
1 |
49 |
251 |
1496 |
6609 |
20361 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23603 |
2907 |
296 |
608 |
88 |
9 |
0 |
0 |
| OW |
53 |
275 |
84 |
471 |
528 |
53 |
0 |
0 |
| VODI |
25 |
98 |
78 |
410 |
594 |
169 |
0 |
0 |
| ODI |
1 |
11 |
20 |
142 |
454 |
230 |
29 |
0 |
| CDI |
0 |
2 |
10 |
83 |
603 |
478 |
131 |
5 |
| VCDI |
0 |
0 |
1 |
41 |
299 |
1408 |
6574 |
20360 |
|
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 |
23651 |
2785 |
223 |
310 |
33 |
0 |
0 |
0 |
| OW |
38 |
363 |
139 |
369 |
186 |
12 |
0 |
0 |
| VODI |
12 |
125 |
54 |
580 |
459 |
88 |
0 |
0 |
| ODI |
6 |
9 |
9 |
184 |
648 |
468 |
0 |
0 |
| CDI |
0 |
6 |
1 |
62 |
348 |
920 |
27 |
4 |
| VCDI |
0 |
2 |
0 |
25 |
133 |
1579 |
7374 |
19999 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23582 |
2678 |
193 |
341 |
121 |
3 |
0 |
0 |
| OW |
92 |
291 |
110 |
271 |
319 |
82 |
0 |
0 |
| VODI |
28 |
218 |
67 |
508 |
489 |
300 |
5 |
0 |
| ODI |
5 |
86 |
34 |
238 |
264 |
347 |
18 |
0 |
| CDI |
0 |
16 |
15 |
110 |
437 |
718 |
101 |
5 |
| VCDI |
0 |
1 |
7 |
62 |
177 |
1617 |
7277 |
19998 |
|
Date: 2025-11-14:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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