Validation of sea ice concentration
Bulletin date: 2025-05-29
Model vs. observations, sea ice class contingency tables
Date: 2025-05-23:
| 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 |
58778 |
20748 |
5388 |
705 |
167 |
32 |
28 |
0 |
| OW |
9 |
354 |
2460 |
3796 |
1435 |
438 |
175 |
0 |
| VODI |
2 |
34 |
479 |
3025 |
2862 |
2860 |
1067 |
7 |
| ODI |
3 |
0 |
55 |
979 |
1099 |
4549 |
4972 |
55 |
| CDI |
0 |
0 |
17 |
249 |
327 |
1804 |
17774 |
445 |
| VCDI |
0 |
0 |
0 |
95 |
38 |
114 |
5560 |
15860 |
|
...date precedes bulletin
|
Date: 2025-05-27:
| 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 |
62976 |
20818 |
5805 |
776 |
149 |
31 |
60 |
0 |
| OW |
4 |
221 |
1906 |
3093 |
1747 |
343 |
305 |
0 |
| VODI |
3 |
13 |
411 |
2306 |
3426 |
1948 |
800 |
0 |
| ODI |
1 |
4 |
87 |
635 |
1370 |
4829 |
3564 |
0 |
| CDI |
0 |
0 |
31 |
293 |
288 |
2498 |
13915 |
182 |
| VCDI |
0 |
0 |
0 |
73 |
34 |
39 |
9053 |
14807 |
|
...date precedes bulletin
|
Date: 2025-05-29:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-06-02:
| 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 |
67161 |
20374 |
3349 |
866 |
264 |
74 |
87 |
0 |
| OW |
5 |
385 |
2281 |
3479 |
1691 |
568 |
286 |
0 |
| VODI |
0 |
13 |
594 |
2416 |
3359 |
2207 |
721 |
7 |
| ODI |
0 |
4 |
48 |
720 |
1742 |
4809 |
2879 |
59 |
| CDI |
0 |
4 |
12 |
326 |
503 |
2594 |
16018 |
3017 |
| VCDI |
0 |
0 |
0 |
62 |
16 |
112 |
6393 |
9339 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
67161 |
20290 |
2925 |
639 |
224 |
54 |
53 |
0 |
| OW |
5 |
468 |
2736 |
3605 |
1602 |
562 |
241 |
1 |
| VODI |
0 |
14 |
575 |
2366 |
3657 |
2341 |
847 |
23 |
| ODI |
0 |
5 |
37 |
827 |
1570 |
4635 |
3511 |
69 |
| CDI |
0 |
3 |
11 |
317 |
460 |
2618 |
13661 |
2802 |
| VCDI |
0 |
0 |
0 |
115 |
62 |
154 |
8071 |
9527 |
|
Date: 2025-06-04:
| 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 |
68677 |
19396 |
5198 |
1427 |
348 |
75 |
102 |
0 |
| OW |
4 |
236 |
2015 |
3497 |
2007 |
323 |
456 |
0 |
| VODI |
0 |
17 |
462 |
1541 |
3295 |
2127 |
1390 |
11 |
| ODI |
0 |
7 |
77 |
454 |
1166 |
2813 |
4837 |
37 |
| CDI |
0 |
0 |
14 |
375 |
346 |
1071 |
15169 |
5381 |
| VCDI |
0 |
0 |
0 |
4 |
12 |
131 |
7664 |
6682 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
68677 |
19226 |
3553 |
522 |
170 |
70 |
84 |
0 |
| OW |
4 |
385 |
3461 |
3211 |
1814 |
484 |
426 |
1 |
| VODI |
0 |
30 |
639 |
2384 |
3023 |
1696 |
1670 |
13 |
| ODI |
0 |
14 |
88 |
682 |
1492 |
2543 |
5058 |
41 |
| CDI |
0 |
1 |
25 |
367 |
610 |
1561 |
15143 |
6839 |
| VCDI |
0 |
0 |
0 |
132 |
65 |
186 |
7237 |
5217 |
|
Date: 2025-06-06:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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