Validation of sea ice concentration
Bulletin date: 2025-06-05
Model vs. observations, sea ice class contingency tables
Date: 2025-05-30:
| 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 |
67458 |
20472 |
2721 |
563 |
120 |
57 |
50 |
0 |
| OW |
4 |
559 |
2314 |
2744 |
1552 |
363 |
301 |
1 |
| VODI |
3 |
47 |
1044 |
1911 |
3148 |
2123 |
1056 |
23 |
| ODI |
0 |
22 |
113 |
584 |
1378 |
4031 |
3969 |
66 |
| CDI |
0 |
8 |
48 |
409 |
548 |
1419 |
16295 |
2731 |
| VCDI |
0 |
0 |
0 |
31 |
25 |
21 |
6117 |
12395 |
|
...date precedes bulletin
|
Date: 2025-06-03:
| 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 |
66973 |
20632 |
4301 |
1541 |
413 |
90 |
88 |
0 |
| OW |
4 |
351 |
1551 |
3477 |
2453 |
471 |
282 |
0 |
| VODI |
0 |
4 |
248 |
1849 |
3194 |
2897 |
1061 |
7 |
| ODI |
0 |
1 |
23 |
419 |
994 |
3765 |
4876 |
37 |
| CDI |
0 |
0 |
2 |
372 |
304 |
1690 |
13790 |
4275 |
| VCDI |
0 |
0 |
0 |
2 |
12 |
125 |
7815 |
8455 |
|
...date precedes bulletin
|
Date: 2025-06-05:
| 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 |
70498 |
19319 |
4611 |
1114 |
217 |
38 |
101 |
0 |
| OW |
2 |
287 |
2663 |
3866 |
1306 |
210 |
340 |
1 |
| VODI |
0 |
15 |
432 |
2302 |
3554 |
1697 |
997 |
34 |
| ODI |
0 |
1 |
67 |
540 |
1362 |
3461 |
3308 |
80 |
| CDI |
0 |
0 |
1 |
287 |
363 |
1157 |
14533 |
6531 |
| VCDI |
0 |
0 |
0 |
15 |
1 |
8 |
4620 |
8905 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
70499 |
19345 |
4713 |
1256 |
263 |
48 |
131 |
0 |
| OW |
1 |
260 |
2620 |
3844 |
1317 |
219 |
368 |
1 |
| VODI |
0 |
16 |
380 |
2201 |
3409 |
1761 |
922 |
31 |
| ODI |
0 |
1 |
61 |
513 |
1436 |
3500 |
3267 |
80 |
| CDI |
0 |
0 |
0 |
308 |
378 |
1042 |
14711 |
6193 |
| VCDI |
0 |
0 |
0 |
2 |
0 |
1 |
4500 |
9246 |
|
Date: 2025-06-09:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-06-11:
| 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 |
74092 |
19412 |
6523 |
1258 |
296 |
107 |
143 |
3 |
| OW |
0 |
149 |
3430 |
2454 |
944 |
328 |
400 |
20 |
| VODI |
0 |
0 |
630 |
1599 |
2480 |
2720 |
1050 |
60 |
| ODI |
0 |
0 |
56 |
300 |
792 |
2811 |
4130 |
102 |
| CDI |
0 |
0 |
2 |
135 |
148 |
739 |
10782 |
385 |
| VCDI |
0 |
0 |
0 |
32 |
87 |
96 |
5840 |
14309 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
74092 |
18820 |
4807 |
1106 |
282 |
131 |
148 |
3 |
| OW |
0 |
732 |
4336 |
2114 |
910 |
428 |
415 |
18 |
| VODI |
0 |
9 |
1334 |
1835 |
2194 |
2177 |
1119 |
61 |
| ODI |
0 |
0 |
125 |
510 |
1037 |
2682 |
3764 |
122 |
| CDI |
0 |
0 |
39 |
176 |
242 |
1295 |
12559 |
3120 |
| VCDI |
0 |
0 |
0 |
37 |
82 |
88 |
4340 |
11555 |
|
Date: 2025-06-13:
| 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 |
75575 |
19462 |
5937 |
1091 |
218 |
68 |
146 |
2 |
| OW |
0 |
464 |
3631 |
2501 |
665 |
314 |
432 |
22 |
| VODI |
0 |
0 |
712 |
1959 |
2509 |
2196 |
1106 |
72 |
| ODI |
0 |
0 |
44 |
306 |
878 |
2788 |
3612 |
139 |
| CDI |
0 |
0 |
7 |
112 |
155 |
1005 |
10990 |
371 |
| VCDI |
0 |
0 |
0 |
9 |
55 |
52 |
5032 |
14207 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
75575 |
18340 |
4138 |
899 |
231 |
123 |
173 |
1 |
| OW |
0 |
1378 |
4139 |
2423 |
610 |
381 |
401 |
15 |
| VODI |
0 |
206 |
1768 |
1879 |
2034 |
1941 |
1305 |
106 |
| ODI |
0 |
2 |
240 |
624 |
1264 |
2309 |
3784 |
160 |
| CDI |
0 |
0 |
46 |
147 |
294 |
1612 |
11708 |
2062 |
| VCDI |
0 |
0 |
0 |
6 |
47 |
57 |
3947 |
12469 |
|
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