Validation of sea ice concentration
Bulletin date: 2025-06-19
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2025-06-17:
| 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 |
75071 |
20350 |
8342 |
972 |
140 |
61 |
276 |
3 |
| OW |
0 |
111 |
2994 |
2973 |
706 |
407 |
438 |
27 |
| VODI |
0 |
0 |
401 |
2137 |
2100 |
2067 |
1686 |
89 |
| ODI |
0 |
0 |
49 |
234 |
423 |
1076 |
5307 |
97 |
| CDI |
0 |
0 |
19 |
121 |
133 |
176 |
7050 |
394 |
| VCDI |
0 |
0 |
0 |
5 |
5 |
4 |
7834 |
14566 |
|
...date precedes bulletin
|
Date: 2025-06-19:
| 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 |
76387 |
19128 |
8613 |
803 |
102 |
53 |
322 |
1 |
| OW |
0 |
421 |
4028 |
2246 |
542 |
339 |
538 |
28 |
| VODI |
0 |
0 |
921 |
2269 |
1503 |
1817 |
2073 |
98 |
| ODI |
0 |
0 |
73 |
373 |
433 |
803 |
4786 |
144 |
| CDI |
0 |
0 |
135 |
103 |
220 |
342 |
7016 |
514 |
| VCDI |
0 |
0 |
95 |
37 |
5 |
8 |
7507 |
14018 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
76387 |
19203 |
9120 |
1077 |
122 |
78 |
323 |
1 |
| OW |
0 |
345 |
3536 |
2052 |
495 |
332 |
600 |
23 |
| VODI |
0 |
1 |
893 |
2119 |
1512 |
1804 |
2081 |
96 |
| ODI |
0 |
0 |
102 |
405 |
433 |
742 |
4693 |
147 |
| CDI |
0 |
0 |
148 |
135 |
237 |
397 |
6974 |
522 |
| VCDI |
0 |
0 |
66 |
43 |
6 |
9 |
7571 |
14014 |
|
Date: 2025-06-23:
| 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 |
76421 |
17576 |
11200 |
1167 |
210 |
99 |
377 |
1 |
| OW |
0 |
254 |
3472 |
2623 |
614 |
323 |
554 |
31 |
| VODI |
0 |
9 |
867 |
2146 |
1523 |
1587 |
1746 |
99 |
| ODI |
0 |
0 |
151 |
535 |
663 |
1291 |
3334 |
74 |
| CDI |
0 |
0 |
236 |
281 |
355 |
805 |
7060 |
391 |
| VCDI |
0 |
0 |
0 |
93 |
78 |
134 |
8278 |
12186 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
76421 |
17565 |
10921 |
1119 |
173 |
73 |
331 |
0 |
| OW |
0 |
264 |
3772 |
2678 |
614 |
309 |
530 |
42 |
| VODI |
0 |
10 |
865 |
2151 |
1553 |
1635 |
1861 |
83 |
| ODI |
0 |
0 |
143 |
535 |
659 |
1302 |
3286 |
78 |
| CDI |
0 |
0 |
225 |
271 |
355 |
764 |
6657 |
504 |
| VCDI |
0 |
0 |
0 |
91 |
89 |
156 |
8684 |
12075 |
|
Date: 2025-06-25:
| 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 |
76478 |
17654 |
13442 |
1326 |
275 |
127 |
460 |
1 |
| OW |
0 |
111 |
3173 |
2515 |
633 |
261 |
483 |
25 |
| VODI |
0 |
0 |
551 |
1964 |
1718 |
1401 |
1706 |
112 |
| ODI |
0 |
0 |
120 |
321 |
473 |
913 |
3685 |
71 |
| CDI |
0 |
0 |
117 |
299 |
355 |
461 |
6850 |
1074 |
| VCDI |
0 |
0 |
0 |
12 |
38 |
139 |
7950 |
11550 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
76478 |
17527 |
11278 |
1185 |
289 |
150 |
426 |
3 |
| OW |
0 |
230 |
4432 |
2168 |
646 |
281 |
543 |
32 |
| VODI |
0 |
8 |
1363 |
1879 |
1343 |
1058 |
1862 |
101 |
| ODI |
0 |
0 |
230 |
675 |
648 |
962 |
3175 |
71 |
| CDI |
0 |
0 |
100 |
468 |
460 |
665 |
7820 |
2339 |
| VCDI |
0 |
0 |
0 |
62 |
106 |
186 |
7308 |
10287 |
|
Date: 2025-06-27:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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