Validation of sea ice concentration - Full domain
Bulletin date: 2025-11-13
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-11-07:
| 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 |
111940 |
11078 |
592 |
990 |
94 |
0 |
0 |
0 |
| OW |
204 |
897 |
321 |
1455 |
553 |
50 |
0 |
0 |
| VODI |
17 |
82 |
87 |
748 |
925 |
155 |
0 |
0 |
| ODI |
0 |
0 |
1 |
335 |
693 |
344 |
6 |
0 |
| CDI |
0 |
0 |
0 |
101 |
859 |
1141 |
193 |
4 |
| VCDI |
0 |
0 |
0 |
8 |
557 |
5473 |
24034 |
30806 |
|
...date precedes bulletin
|
Date: 2025-11-09:
| 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 |
110234 |
11328 |
462 |
758 |
84 |
0 |
0 |
0 |
| OW |
123 |
1183 |
317 |
1256 |
709 |
62 |
0 |
0 |
| VODI |
8 |
320 |
141 |
943 |
965 |
234 |
15 |
0 |
| ODI |
1 |
21 |
24 |
382 |
668 |
395 |
24 |
0 |
| CDI |
0 |
2 |
8 |
147 |
963 |
921 |
162 |
47 |
| VCDI |
0 |
0 |
0 |
47 |
391 |
4915 |
22063 |
34420 |
|
...date precedes bulletin
|
Date: 2025-11-11:
| 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 |
109507 |
10869 |
412 |
618 |
80 |
0 |
0 |
0 |
| OW |
106 |
1184 |
343 |
1086 |
360 |
3 |
0 |
0 |
| VODI |
24 |
126 |
94 |
1032 |
1110 |
60 |
0 |
0 |
| ODI |
1 |
11 |
3 |
234 |
1459 |
483 |
0 |
3 |
| CDI |
0 |
3 |
0 |
62 |
1037 |
1587 |
97 |
57 |
| VCDI |
0 |
0 |
0 |
19 |
161 |
4425 |
21185 |
36902 |
|
...date precedes bulletin
|
Date: 2025-11-13:
| 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 |
108327 |
9972 |
378 |
611 |
52 |
0 |
0 |
0 |
| OW |
109 |
1243 |
285 |
677 |
267 |
18 |
0 |
0 |
| VODI |
12 |
1235 |
172 |
1128 |
983 |
96 |
0 |
0 |
| ODI |
2 |
286 |
30 |
497 |
1138 |
531 |
0 |
0 |
| CDI |
5 |
12 |
2 |
84 |
875 |
2081 |
113 |
9 |
| VCDI |
11 |
15 |
1 |
21 |
294 |
5174 |
22153 |
35844 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
108347 |
9987 |
387 |
638 |
78 |
1 |
0 |
0 |
| OW |
87 |
1171 |
284 |
618 |
224 |
15 |
0 |
0 |
| VODI |
13 |
1273 |
159 |
1152 |
970 |
97 |
0 |
0 |
| ODI |
3 |
305 |
35 |
480 |
1077 |
472 |
1 |
0 |
| CDI |
4 |
13 |
2 |
110 |
957 |
2087 |
136 |
12 |
| VCDI |
12 |
14 |
1 |
20 |
303 |
5228 |
22129 |
35841 |
|
Date: 2025-11-15:
| 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 |
107228 |
10863 |
433 |
612 |
5 |
0 |
0 |
0 |
| OW |
338 |
1304 |
238 |
803 |
316 |
3 |
0 |
0 |
| VODI |
176 |
532 |
198 |
1056 |
826 |
106 |
0 |
0 |
| ODI |
0 |
139 |
54 |
456 |
692 |
434 |
21 |
0 |
| CDI |
1 |
7 |
4 |
192 |
1040 |
1711 |
168 |
7 |
| VCDI |
0 |
12 |
1 |
57 |
578 |
6732 |
23633 |
33767 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
107248 |
10810 |
434 |
648 |
41 |
0 |
0 |
0 |
| OW |
327 |
1317 |
251 |
736 |
247 |
2 |
0 |
0 |
| VODI |
167 |
577 |
186 |
1074 |
832 |
73 |
0 |
0 |
| ODI |
1 |
134 |
51 |
469 |
689 |
378 |
13 |
0 |
| CDI |
0 |
7 |
5 |
200 |
1070 |
1577 |
180 |
5 |
| VCDI |
0 |
12 |
1 |
49 |
578 |
6956 |
23629 |
33769 |
|
Date: 2025-11-17:
| 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 |
105640 |
12752 |
493 |
413 |
23 |
1 |
0 |
0 |
| OW |
276 |
902 |
440 |
1112 |
53 |
4 |
0 |
0 |
| VODI |
10 |
187 |
62 |
1132 |
686 |
42 |
0 |
0 |
| ODI |
1 |
30 |
25 |
383 |
1141 |
117 |
5 |
1 |
| CDI |
3 |
0 |
0 |
102 |
1357 |
1980 |
86 |
16 |
| VCDI |
13 |
0 |
0 |
20 |
686 |
9189 |
23917 |
31443 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
105463 |
12021 |
411 |
522 |
34 |
0 |
0 |
0 |
| OW |
337 |
1344 |
348 |
730 |
256 |
6 |
0 |
0 |
| VODI |
125 |
396 |
203 |
1042 |
908 |
152 |
0 |
0 |
| ODI |
2 |
75 |
27 |
560 |
760 |
475 |
0 |
1 |
| CDI |
0 |
27 |
21 |
264 |
1243 |
1178 |
60 |
14 |
| VCDI |
16 |
8 |
10 |
44 |
745 |
9522 |
23948 |
31445 |
|
Date: 2025-11-19:
| 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 |
105569 |
11376 |
384 |
493 |
44 |
0 |
0 |
0 |
| OW |
198 |
1153 |
301 |
828 |
162 |
3 |
0 |
0 |
| VODI |
6 |
308 |
140 |
1104 |
801 |
119 |
0 |
0 |
| ODI |
1 |
91 |
22 |
457 |
926 |
376 |
1 |
0 |
| CDI |
2 |
32 |
8 |
140 |
1100 |
1776 |
197 |
13 |
| VCDI |
14 |
6 |
4 |
41 |
368 |
7845 |
25891 |
32443 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
105271 |
10445 |
335 |
642 |
100 |
0 |
0 |
0 |
| OW |
388 |
1712 |
216 |
536 |
171 |
28 |
0 |
0 |
| VODI |
114 |
658 |
227 |
1016 |
786 |
255 |
0 |
0 |
| ODI |
1 |
118 |
62 |
579 |
801 |
663 |
18 |
2 |
| CDI |
2 |
20 |
14 |
229 |
1213 |
1551 |
243 |
7 |
| VCDI |
14 |
13 |
5 |
61 |
330 |
7622 |
25828 |
32447 |
|
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 |
104752 |
11064 |
325 |
269 |
13 |
0 |
0 |
0 |
| OW |
117 |
1541 |
303 |
668 |
106 |
0 |
0 |
0 |
| VODI |
8 |
603 |
245 |
1182 |
583 |
48 |
0 |
0 |
| ODI |
1 |
95 |
49 |
580 |
917 |
305 |
3 |
0 |
| CDI |
9 |
11 |
1 |
258 |
1395 |
1358 |
128 |
6 |
| VCDI |
10 |
13 |
0 |
100 |
584 |
6200 |
23386 |
37507 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
104466 |
10605 |
289 |
439 |
117 |
34 |
0 |
0 |
| OW |
283 |
1426 |
319 |
491 |
75 |
20 |
0 |
0 |
| VODI |
126 |
1052 |
213 |
1105 |
654 |
167 |
2 |
0 |
| ODI |
6 |
175 |
75 |
540 |
898 |
540 |
37 |
0 |
| CDI |
8 |
55 |
27 |
395 |
1194 |
1469 |
293 |
11 |
| VCDI |
8 |
14 |
0 |
87 |
660 |
5681 |
23185 |
37502 |
|
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