Validation of sea ice concentration - Full domain
Bulletin date: 2025-10-30
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-10-24:
| 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 |
120721 |
10135 |
741 |
1486 |
164 |
12 |
0 |
0 |
| OW |
30 |
301 |
279 |
1462 |
822 |
205 |
4 |
0 |
| VODI |
20 |
59 |
62 |
980 |
1562 |
632 |
91 |
0 |
| ODI |
1 |
2 |
3 |
218 |
1372 |
750 |
162 |
0 |
| CDI |
0 |
0 |
0 |
89 |
1465 |
2176 |
691 |
0 |
| VCDI |
1 |
0 |
0 |
3 |
205 |
11065 |
19838 |
16934 |
|
...date precedes bulletin
|
Date: 2025-10-26:
| 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 |
120068 |
9314 |
774 |
1392 |
120 |
1 |
0 |
0 |
| OW |
36 |
218 |
267 |
1487 |
639 |
37 |
2 |
0 |
| VODI |
23 |
33 |
32 |
903 |
1671 |
298 |
23 |
0 |
| ODI |
3 |
8 |
1 |
155 |
1627 |
891 |
79 |
0 |
| CDI |
0 |
0 |
0 |
23 |
929 |
2626 |
517 |
0 |
| VCDI |
1 |
0 |
0 |
0 |
279 |
10828 |
24102 |
15336 |
|
...date precedes bulletin
|
Date: 2025-10-28:
| 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 |
118846 |
9330 |
565 |
956 |
64 |
0 |
0 |
0 |
| OW |
7 |
245 |
227 |
1386 |
359 |
0 |
0 |
0 |
| VODI |
3 |
23 |
4 |
1133 |
1899 |
140 |
2 |
0 |
| ODI |
0 |
3 |
0 |
100 |
1670 |
1286 |
87 |
0 |
| CDI |
0 |
1 |
0 |
13 |
871 |
2974 |
567 |
0 |
| VCDI |
0 |
0 |
1 |
0 |
64 |
9946 |
25240 |
16731 |
|
...date precedes bulletin
|
Date: 2025-10-30:
| 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 |
117127 |
10145 |
448 |
825 |
199 |
5 |
0 |
0 |
| OW |
17 |
376 |
231 |
856 |
333 |
28 |
0 |
0 |
| VODI |
3 |
60 |
78 |
856 |
1021 |
462 |
51 |
0 |
| ODI |
0 |
2 |
3 |
217 |
1128 |
1453 |
131 |
4 |
| CDI |
0 |
0 |
1 |
68 |
713 |
2127 |
703 |
13 |
| VCDI |
0 |
0 |
0 |
1 |
126 |
8382 |
24444 |
22106 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
117119 |
10175 |
451 |
864 |
223 |
10 |
0 |
0 |
| OW |
25 |
329 |
204 |
753 |
309 |
19 |
0 |
0 |
| VODI |
3 |
75 |
102 |
887 |
911 |
451 |
67 |
0 |
| ODI |
0 |
4 |
3 |
245 |
1173 |
1365 |
165 |
3 |
| CDI |
0 |
0 |
1 |
73 |
778 |
2142 |
626 |
12 |
| VCDI |
0 |
0 |
0 |
1 |
126 |
8470 |
24471 |
22108 |
|
Date: 2025-11-01:
| 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 |
114643 |
11766 |
493 |
721 |
63 |
3 |
0 |
0 |
| OW |
84 |
816 |
309 |
882 |
240 |
12 |
0 |
0 |
| VODI |
4 |
77 |
103 |
839 |
708 |
157 |
90 |
0 |
| ODI |
0 |
2 |
16 |
385 |
786 |
730 |
485 |
5 |
| CDI |
0 |
0 |
0 |
120 |
1008 |
1346 |
1090 |
59 |
| VCDI |
0 |
0 |
0 |
0 |
199 |
5572 |
22979 |
27951 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
114592 |
11868 |
494 |
767 |
113 |
5 |
0 |
0 |
| OW |
134 |
657 |
310 |
880 |
250 |
18 |
0 |
0 |
| VODI |
5 |
136 |
99 |
756 |
624 |
132 |
65 |
0 |
| ODI |
0 |
0 |
18 |
400 |
765 |
668 |
441 |
3 |
| CDI |
0 |
0 |
0 |
135 |
1016 |
1339 |
1172 |
50 |
| VCDI |
0 |
0 |
0 |
9 |
236 |
5658 |
22966 |
27962 |
|
Date: 2025-11-03:
| 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 |
115283 |
11165 |
490 |
624 |
42 |
0 |
0 |
0 |
| OW |
88 |
682 |
385 |
1174 |
246 |
0 |
0 |
0 |
| VODI |
4 |
16 |
22 |
796 |
730 |
11 |
0 |
0 |
| ODI |
0 |
0 |
0 |
142 |
1268 |
273 |
189 |
9 |
| CDI |
0 |
0 |
0 |
37 |
841 |
1387 |
594 |
168 |
| VCDI |
0 |
0 |
0 |
1 |
178 |
6932 |
22039 |
28927 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
115240 |
10904 |
455 |
937 |
130 |
0 |
0 |
0 |
| OW |
115 |
816 |
276 |
617 |
410 |
2 |
0 |
0 |
| VODI |
20 |
123 |
122 |
649 |
660 |
77 |
0 |
0 |
| ODI |
0 |
18 |
27 |
339 |
792 |
227 |
372 |
5 |
| CDI |
0 |
2 |
17 |
161 |
940 |
1033 |
926 |
107 |
| VCDI |
0 |
0 |
0 |
71 |
373 |
7264 |
21524 |
28992 |
|
Date: 2025-11-05:
| 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 |
114071 |
11252 |
620 |
925 |
161 |
0 |
0 |
0 |
| OW |
104 |
613 |
288 |
1133 |
459 |
0 |
0 |
0 |
| VODI |
7 |
30 |
61 |
681 |
848 |
18 |
0 |
0 |
| ODI |
1 |
3 |
10 |
264 |
742 |
159 |
0 |
5 |
| CDI |
0 |
0 |
1 |
114 |
843 |
1230 |
73 |
41 |
| VCDI |
0 |
0 |
0 |
17 |
463 |
7824 |
22229 |
29453 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
113968 |
10597 |
575 |
978 |
266 |
0 |
0 |
0 |
| OW |
178 |
1062 |
225 |
866 |
504 |
13 |
0 |
0 |
| VODI |
32 |
228 |
147 |
726 |
786 |
65 |
0 |
0 |
| ODI |
5 |
9 |
21 |
331 |
671 |
276 |
61 |
88 |
| CDI |
0 |
2 |
12 |
198 |
778 |
1158 |
398 |
309 |
| VCDI |
0 |
0 |
0 |
35 |
511 |
7719 |
21843 |
29102 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
111832 |
10258 |
526 |
945 |
166 |
0 |
0 |
0 |
| OW |
295 |
1467 |
324 |
1354 |
460 |
60 |
0 |
0 |
| VODI |
28 |
317 |
129 |
913 |
1045 |
317 |
11 |
0 |
| ODI |
5 |
12 |
14 |
257 |
799 |
358 |
50 |
4 |
| CDI |
1 |
3 |
8 |
130 |
667 |
1030 |
468 |
321 |
| VCDI |
0 |
0 |
0 |
38 |
544 |
5398 |
23704 |
30485 |
|
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