Validation of sea ice concentration - Full domain
Bulletin date: 2025-12-04
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-11-28:
| 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 |
99897 |
12499 |
447 |
482 |
33 |
0 |
0 |
0 |
| OW |
116 |
1367 |
311 |
894 |
207 |
17 |
0 |
0 |
| VODI |
16 |
690 |
272 |
1248 |
606 |
171 |
0 |
0 |
| ODI |
0 |
116 |
69 |
795 |
849 |
232 |
2 |
0 |
| CDI |
0 |
13 |
47 |
281 |
1240 |
829 |
65 |
4 |
| VCDI |
0 |
1 |
1 |
138 |
792 |
6587 |
22779 |
40630 |
|
...date precedes bulletin
|
Date: 2025-11-30:
| 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 |
97032 |
14426 |
344 |
609 |
76 |
4 |
0 |
0 |
| OW |
411 |
1279 |
274 |
885 |
346 |
60 |
0 |
0 |
| VODI |
59 |
854 |
200 |
922 |
645 |
414 |
0 |
0 |
| ODI |
2 |
325 |
104 |
560 |
577 |
341 |
2 |
0 |
| CDI |
0 |
161 |
34 |
399 |
991 |
1042 |
92 |
28 |
| VCDI |
0 |
144 |
83 |
353 |
985 |
8147 |
22938 |
38595 |
|
...date precedes bulletin
|
Date: 2025-12-02:
| 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 |
95251 |
15346 |
495 |
435 |
1 |
0 |
0 |
0 |
| OW |
44 |
1571 |
453 |
1031 |
177 |
1 |
0 |
0 |
| VODI |
8 |
426 |
185 |
1288 |
727 |
48 |
0 |
0 |
| ODI |
0 |
172 |
26 |
461 |
1107 |
153 |
1 |
0 |
| CDI |
0 |
77 |
34 |
302 |
1385 |
1382 |
121 |
18 |
| VCDI |
0 |
25 |
36 |
343 |
723 |
7409 |
26209 |
37272 |
|
...date precedes bulletin
|
Date: 2025-12-04:
| 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 |
91867 |
16531 |
454 |
597 |
3 |
0 |
0 |
0 |
| OW |
83 |
1228 |
434 |
1277 |
215 |
12 |
0 |
0 |
| VODI |
6 |
215 |
186 |
1345 |
790 |
160 |
0 |
0 |
| ODI |
0 |
17 |
30 |
639 |
1268 |
250 |
4 |
0 |
| CDI |
0 |
6 |
8 |
343 |
1539 |
1330 |
82 |
11 |
| VCDI |
0 |
0 |
0 |
132 |
1079 |
5629 |
22562 |
44411 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
91855 |
16625 |
477 |
721 |
22 |
0 |
0 |
0 |
| OW |
96 |
1161 |
430 |
1210 |
266 |
21 |
0 |
0 |
| VODI |
5 |
191 |
171 |
1312 |
774 |
171 |
0 |
0 |
| ODI |
0 |
17 |
22 |
627 |
1195 |
266 |
4 |
0 |
| CDI |
0 |
3 |
12 |
314 |
1574 |
1344 |
103 |
11 |
| VCDI |
0 |
0 |
0 |
149 |
1063 |
5579 |
22541 |
44411 |
|
Date: 2025-12-06:
| 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 |
90330 |
15954 |
502 |
752 |
71 |
0 |
0 |
0 |
| OW |
119 |
1645 |
343 |
906 |
358 |
56 |
0 |
0 |
| VODI |
5 |
468 |
231 |
1158 |
597 |
284 |
0 |
0 |
| ODI |
0 |
58 |
33 |
715 |
988 |
328 |
2 |
0 |
| CDI |
0 |
26 |
23 |
291 |
1995 |
1565 |
120 |
0 |
| VCDI |
0 |
2 |
1 |
40 |
869 |
5992 |
21908 |
46008 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
90301 |
16076 |
539 |
845 |
85 |
0 |
0 |
0 |
| OW |
146 |
1541 |
320 |
864 |
382 |
98 |
0 |
0 |
| VODI |
7 |
444 |
230 |
1177 |
630 |
273 |
0 |
0 |
| ODI |
0 |
67 |
31 |
670 |
988 |
378 |
1 |
0 |
| CDI |
0 |
25 |
13 |
248 |
1874 |
1573 |
132 |
0 |
| VCDI |
0 |
0 |
0 |
58 |
919 |
5903 |
21897 |
46008 |
|
Date: 2025-12-08:
| 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 |
87681 |
17486 |
613 |
1216 |
104 |
0 |
0 |
0 |
| OW |
223 |
1351 |
304 |
911 |
387 |
15 |
0 |
0 |
| VODI |
36 |
366 |
254 |
1020 |
669 |
107 |
1 |
0 |
| ODI |
0 |
75 |
50 |
802 |
901 |
210 |
7 |
0 |
| CDI |
0 |
24 |
5 |
351 |
1592 |
1151 |
127 |
11 |
| VCDI |
0 |
5 |
5 |
134 |
1638 |
6187 |
24918 |
43806 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87657 |
16906 |
558 |
1022 |
105 |
0 |
0 |
0 |
| OW |
231 |
1711 |
308 |
952 |
340 |
26 |
0 |
0 |
| VODI |
52 |
535 |
281 |
1129 |
679 |
94 |
1 |
0 |
| ODI |
0 |
129 |
73 |
893 |
1070 |
229 |
7 |
0 |
| CDI |
0 |
22 |
6 |
312 |
1592 |
1290 |
86 |
7 |
| VCDI |
0 |
4 |
5 |
126 |
1505 |
6031 |
24959 |
43810 |
|
Date: 2025-12-10:
| 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 |
87651 |
17280 |
751 |
738 |
85 |
0 |
0 |
0 |
| OW |
208 |
1009 |
445 |
1033 |
218 |
0 |
0 |
0 |
| VODI |
37 |
261 |
158 |
1217 |
477 |
20 |
0 |
0 |
| ODI |
3 |
20 |
12 |
585 |
1078 |
107 |
5 |
0 |
| CDI |
0 |
16 |
2 |
164 |
1754 |
1433 |
173 |
17 |
| VCDI |
0 |
6 |
1 |
67 |
955 |
6349 |
22439 |
47969 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87548 |
15737 |
640 |
818 |
121 |
0 |
0 |
0 |
| OW |
272 |
1625 |
247 |
778 |
378 |
10 |
0 |
0 |
| VODI |
66 |
933 |
319 |
952 |
614 |
78 |
4 |
0 |
| ODI |
13 |
258 |
139 |
854 |
978 |
257 |
9 |
0 |
| CDI |
0 |
39 |
23 |
358 |
1415 |
1181 |
205 |
27 |
| VCDI |
0 |
0 |
1 |
44 |
1061 |
6383 |
22399 |
47959 |
|
Date: 2025-12-12:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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