Validation of sea ice concentration - Full domain
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 |
115949 |
11013 |
451 |
692 |
114 |
4 |
0 |
0 |
| OW |
67 |
513 |
273 |
969 |
191 |
26 |
0 |
0 |
| VODI |
3 |
35 |
67 |
1004 |
754 |
252 |
93 |
0 |
| ODI |
0 |
0 |
6 |
266 |
915 |
1230 |
343 |
0 |
| CDI |
0 |
0 |
0 |
70 |
925 |
1728 |
745 |
30 |
| VCDI |
0 |
0 |
0 |
0 |
122 |
7699 |
22686 |
25508 |
|
...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 |
114675 |
11523 |
496 |
828 |
40 |
0 |
0 |
0 |
| OW |
99 |
731 |
345 |
820 |
237 |
0 |
0 |
0 |
| VODI |
9 |
160 |
94 |
805 |
724 |
60 |
7 |
0 |
| ODI |
0 |
2 |
20 |
330 |
881 |
504 |
322 |
3 |
| CDI |
0 |
0 |
0 |
130 |
1011 |
1302 |
1160 |
29 |
| VCDI |
0 |
0 |
0 |
15 |
311 |
5094 |
21579 |
30397 |
|
...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 |
114723 |
11301 |
641 |
908 |
46 |
0 |
0 |
0 |
| OW |
94 |
637 |
360 |
1063 |
244 |
0 |
0 |
0 |
| VODI |
10 |
22 |
51 |
782 |
647 |
4 |
0 |
0 |
| ODI |
0 |
0 |
3 |
261 |
859 |
207 |
2 |
0 |
| CDI |
0 |
0 |
0 |
73 |
1000 |
1289 |
264 |
35 |
| VCDI |
0 |
0 |
0 |
11 |
306 |
8354 |
21272 |
29274 |
|
...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 |
113121 |
11145 |
656 |
1135 |
56 |
2 |
0 |
0 |
| OW |
71 |
679 |
248 |
1232 |
588 |
9 |
0 |
0 |
| VODI |
9 |
26 |
65 |
666 |
981 |
109 |
0 |
0 |
| ODI |
0 |
0 |
0 |
281 |
725 |
236 |
1 |
1 |
| CDI |
0 |
0 |
0 |
89 |
836 |
1091 |
121 |
26 |
| VCDI |
0 |
0 |
0 |
5 |
492 |
6327 |
23674 |
30040 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
113121 |
11197 |
691 |
1348 |
133 |
8 |
0 |
0 |
| OW |
70 |
616 |
218 |
1013 |
498 |
11 |
0 |
0 |
| VODI |
10 |
37 |
60 |
667 |
930 |
91 |
0 |
0 |
| ODI |
0 |
0 |
0 |
280 |
695 |
234 |
2 |
1 |
| CDI |
0 |
0 |
0 |
97 |
896 |
1026 |
104 |
21 |
| VCDI |
0 |
0 |
0 |
3 |
526 |
6404 |
23690 |
30045 |
|
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 |
109661 |
12381 |
527 |
908 |
104 |
0 |
0 |
0 |
| OW |
134 |
1133 |
296 |
1470 |
671 |
66 |
0 |
0 |
| VODI |
12 |
213 |
81 |
928 |
821 |
222 |
0 |
0 |
| ODI |
0 |
1 |
9 |
320 |
717 |
426 |
13 |
0 |
| CDI |
0 |
0 |
0 |
106 |
862 |
1136 |
238 |
9 |
| VCDI |
0 |
0 |
0 |
18 |
393 |
5203 |
22797 |
32867 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
109634 |
12494 |
597 |
1194 |
178 |
18 |
0 |
0 |
| OW |
159 |
1071 |
235 |
1166 |
603 |
49 |
0 |
0 |
| VODI |
14 |
163 |
81 |
885 |
777 |
205 |
0 |
0 |
| ODI |
0 |
0 |
0 |
365 |
643 |
437 |
16 |
0 |
| CDI |
0 |
0 |
0 |
130 |
951 |
1086 |
202 |
15 |
| VCDI |
0 |
0 |
0 |
10 |
416 |
5258 |
22830 |
32861 |
|
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 |
109543 |
11304 |
580 |
1257 |
232 |
8 |
0 |
0 |
| OW |
117 |
769 |
255 |
873 |
851 |
64 |
0 |
0 |
| VODI |
26 |
332 |
152 |
731 |
1003 |
226 |
6 |
0 |
| ODI |
1 |
36 |
27 |
350 |
781 |
349 |
22 |
0 |
| CDI |
0 |
1 |
10 |
203 |
1122 |
801 |
107 |
34 |
| VCDI |
0 |
0 |
1 |
53 |
449 |
4886 |
20292 |
36889 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
109483 |
11205 |
548 |
1114 |
214 |
9 |
0 |
0 |
| OW |
160 |
845 |
229 |
944 |
852 |
60 |
0 |
0 |
| VODI |
43 |
374 |
202 |
776 |
1161 |
258 |
0 |
0 |
| ODI |
1 |
16 |
33 |
349 |
660 |
411 |
30 |
0 |
| CDI |
0 |
2 |
12 |
238 |
1035 |
844 |
176 |
38 |
| VCDI |
0 |
0 |
1 |
46 |
516 |
4752 |
20221 |
36885 |
|
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 |
105732 |
12529 |
959 |
692 |
69 |
0 |
0 |
0 |
| OW |
67 |
1290 |
323 |
724 |
393 |
13 |
0 |
0 |
| VODI |
12 |
962 |
203 |
1315 |
831 |
105 |
0 |
0 |
| ODI |
6 |
37 |
18 |
502 |
1150 |
561 |
0 |
0 |
| CDI |
0 |
17 |
1 |
105 |
1060 |
1814 |
56 |
44 |
| VCDI |
0 |
6 |
0 |
26 |
221 |
5071 |
20675 |
37154 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
105687 |
12282 |
895 |
769 |
223 |
8 |
0 |
0 |
| OW |
97 |
1297 |
255 |
602 |
651 |
145 |
0 |
0 |
| VODI |
28 |
1054 |
252 |
1015 |
948 |
486 |
5 |
0 |
| ODI |
5 |
178 |
80 |
662 |
685 |
579 |
33 |
0 |
| CDI |
0 |
29 |
15 |
252 |
956 |
1515 |
222 |
46 |
| VCDI |
0 |
1 |
7 |
64 |
261 |
4831 |
20471 |
37152 |
|
Date: 2025-11-14:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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