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 |
109568 |
11463 |
534 |
846 |
62 |
0 |
0 |
0 |
| OW |
102 |
910 |
443 |
1244 |
199 |
0 |
0 |
0 |
| VODI |
17 |
68 |
48 |
1069 |
1252 |
23 |
0 |
0 |
| ODI |
0 |
1 |
0 |
217 |
1696 |
258 |
0 |
1 |
| CDI |
0 |
0 |
0 |
75 |
990 |
1246 |
55 |
39 |
| VCDI |
0 |
0 |
0 |
16 |
239 |
4807 |
20372 |
36883 |
|
|
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 |
108389 |
10523 |
366 |
583 |
48 |
0 |
0 |
0 |
| OW |
72 |
1371 |
308 |
789 |
417 |
16 |
0 |
0 |
| VODI |
15 |
955 |
184 |
1258 |
845 |
117 |
0 |
0 |
| ODI |
4 |
21 |
14 |
519 |
1204 |
572 |
0 |
0 |
| CDI |
0 |
19 |
1 |
103 |
1000 |
1859 |
68 |
41 |
| VCDI |
0 |
4 |
0 |
28 |
210 |
5000 |
20663 |
37157 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
108350 |
10288 |
308 |
687 |
223 |
8 |
0 |
0 |
| OW |
97 |
1314 |
238 |
602 |
651 |
145 |
0 |
0 |
| VODI |
28 |
1064 |
242 |
1015 |
948 |
486 |
5 |
0 |
| ODI |
5 |
197 |
63 |
660 |
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 |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
108258 |
9769 |
340 |
731 |
38 |
0 |
0 |
0 |
| OW |
294 |
1310 |
231 |
653 |
338 |
7 |
0 |
0 |
| VODI |
50 |
1095 |
264 |
949 |
741 |
193 |
0 |
0 |
| ODI |
3 |
262 |
49 |
468 |
779 |
611 |
0 |
0 |
| CDI |
0 |
14 |
6 |
135 |
792 |
1971 |
161 |
8 |
| VCDI |
0 |
18 |
1 |
40 |
301 |
6094 |
23105 |
34664 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
108094 |
9406 |
359 |
833 |
220 |
9 |
0 |
0 |
| OW |
296 |
1253 |
151 |
406 |
384 |
270 |
2 |
0 |
| VODI |
179 |
1294 |
259 |
960 |
817 |
682 |
27 |
0 |
| ODI |
36 |
437 |
82 |
522 |
620 |
808 |
79 |
0 |
| CDI |
0 |
49 |
16 |
162 |
640 |
1409 |
329 |
3 |
| VCDI |
0 |
29 |
24 |
93 |
308 |
5698 |
22829 |
34669 |
|
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