Validation of sea ice concentration - Full domain
Bulletin date: 2025-08-21
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-08-15:
| 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 |
128054 |
9885 |
103 |
61 |
3 |
0 |
0 |
0 |
| OW |
934 |
5186 |
827 |
884 |
33 |
0 |
0 |
0 |
| VODI |
13 |
484 |
599 |
6349 |
714 |
1 |
0 |
0 |
| ODI |
0 |
14 |
2 |
848 |
12170 |
760 |
0 |
0 |
| CDI |
0 |
1 |
0 |
26 |
3627 |
15138 |
1121 |
0 |
| VCDI |
0 |
9 |
1 |
12 |
108 |
1605 |
4514 |
657 |
|
...date precedes bulletin
|
Date: 2025-08-17:
| 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 |
127777 |
10224 |
56 |
39 |
3 |
0 |
0 |
0 |
| OW |
772 |
5657 |
834 |
623 |
34 |
0 |
0 |
0 |
| VODI |
9 |
769 |
947 |
5940 |
1078 |
2 |
0 |
0 |
| ODI |
0 |
20 |
8 |
944 |
12394 |
1004 |
0 |
0 |
| CDI |
0 |
1 |
0 |
47 |
4797 |
11956 |
1130 |
0 |
| VCDI |
0 |
4 |
1 |
16 |
94 |
1217 |
5014 |
1332 |
|
...date precedes bulletin
|
Date: 2025-08-19:
| 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 |
129088 |
11606 |
63 |
60 |
1 |
0 |
0 |
0 |
| OW |
530 |
4762 |
1415 |
1513 |
9 |
0 |
0 |
0 |
| VODI |
4 |
112 |
273 |
5186 |
1493 |
2 |
0 |
0 |
| ODI |
0 |
3 |
1 |
412 |
14468 |
1818 |
0 |
0 |
| CDI |
0 |
0 |
0 |
72 |
2229 |
11458 |
654 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
60 |
2153 |
5139 |
158 |
|
...date precedes bulletin
|
Date: 2025-08-21:
| 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 |
130524 |
10463 |
69 |
57 |
0 |
0 |
0 |
0 |
| OW |
608 |
5741 |
1125 |
874 |
5 |
0 |
0 |
0 |
| VODI |
14 |
299 |
622 |
4943 |
1315 |
4 |
0 |
0 |
| ODI |
0 |
3 |
0 |
726 |
12587 |
2515 |
7 |
0 |
| CDI |
0 |
0 |
2 |
102 |
2975 |
10233 |
2103 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
67 |
1047 |
5441 |
272 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
130490 |
11143 |
115 |
99 |
0 |
0 |
0 |
0 |
| OW |
636 |
5023 |
1117 |
1028 |
15 |
0 |
0 |
0 |
| VODI |
20 |
337 |
584 |
4698 |
1614 |
4 |
0 |
0 |
| ODI |
0 |
3 |
0 |
778 |
11964 |
2081 |
10 |
0 |
| CDI |
0 |
0 |
2 |
99 |
3283 |
10706 |
2081 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
73 |
1008 |
5460 |
272 |
|
Date: 2025-08-23:
| 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 |
129765 |
11268 |
59 |
54 |
0 |
0 |
0 |
0 |
| OW |
877 |
6141 |
797 |
680 |
7 |
0 |
0 |
0 |
| VODI |
10 |
606 |
674 |
4827 |
1500 |
0 |
0 |
0 |
| ODI |
0 |
5 |
5 |
1054 |
11893 |
2826 |
0 |
0 |
| CDI |
0 |
20 |
1 |
110 |
2998 |
11099 |
786 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
68 |
1629 |
4964 |
16 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
129805 |
11842 |
89 |
84 |
1 |
0 |
0 |
0 |
| OW |
832 |
5559 |
808 |
862 |
26 |
0 |
0 |
0 |
| VODI |
15 |
613 |
634 |
4644 |
1878 |
0 |
0 |
0 |
| ODI |
0 |
6 |
4 |
1029 |
10877 |
2392 |
1 |
0 |
| CDI |
0 |
20 |
1 |
108 |
3617 |
11471 |
829 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
67 |
1691 |
4920 |
16 |
|
Date: 2025-08-25:
| 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 |
130681 |
13278 |
58 |
91 |
6 |
0 |
0 |
0 |
| OW |
375 |
4963 |
1169 |
1753 |
12 |
0 |
0 |
0 |
| VODI |
6 |
58 |
162 |
4909 |
1199 |
0 |
0 |
0 |
| ODI |
0 |
5 |
0 |
319 |
12365 |
443 |
0 |
0 |
| CDI |
0 |
5 |
0 |
26 |
3298 |
13023 |
378 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
24 |
2806 |
3331 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
130182 |
11244 |
62 |
91 |
7 |
0 |
0 |
0 |
| OW |
874 |
5975 |
616 |
801 |
25 |
0 |
0 |
0 |
| VODI |
6 |
1055 |
699 |
4783 |
1714 |
0 |
0 |
0 |
| ODI |
0 |
12 |
11 |
1317 |
10910 |
2244 |
20 |
0 |
| CDI |
0 |
23 |
1 |
106 |
4177 |
10649 |
593 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
71 |
3379 |
3096 |
0 |
|
Date: 2025-08-27:
| 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 |
131064 |
12900 |
82 |
90 |
0 |
0 |
0 |
0 |
| OW |
326 |
5227 |
1222 |
1396 |
5 |
0 |
0 |
0 |
| VODI |
5 |
118 |
163 |
4711 |
1554 |
0 |
0 |
0 |
| ODI |
0 |
7 |
0 |
356 |
11360 |
1153 |
0 |
0 |
| CDI |
0 |
6 |
1 |
24 |
3057 |
13979 |
901 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
24 |
3417 |
1595 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
130653 |
10543 |
67 |
80 |
0 |
0 |
0 |
0 |
| OW |
736 |
6199 |
671 |
848 |
36 |
0 |
0 |
0 |
| VODI |
6 |
1364 |
701 |
4225 |
2065 |
3 |
0 |
0 |
| ODI |
0 |
117 |
24 |
1332 |
10076 |
3443 |
84 |
0 |
| CDI |
0 |
35 |
5 |
82 |
3780 |
10796 |
629 |
0 |
| VCDI |
0 |
0 |
0 |
10 |
43 |
4307 |
1783 |
0 |
|
Date: 2025-08-29:
| 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 |
132548 |
11403 |
78 |
61 |
0 |
0 |
0 |
0 |
| OW |
288 |
5569 |
967 |
1238 |
13 |
0 |
0 |
0 |
| VODI |
3 |
301 |
313 |
4783 |
1422 |
1 |
0 |
0 |
| ODI |
0 |
18 |
6 |
403 |
10129 |
1584 |
2 |
0 |
| CDI |
0 |
7 |
0 |
26 |
2997 |
15874 |
395 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
27 |
3526 |
761 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
132105 |
8901 |
54 |
52 |
0 |
0 |
0 |
0 |
| OW |
732 |
6341 |
589 |
1039 |
60 |
0 |
0 |
0 |
| VODI |
2 |
1820 |
624 |
3880 |
2168 |
258 |
0 |
0 |
| ODI |
0 |
199 |
94 |
1334 |
9281 |
3743 |
36 |
0 |
| CDI |
0 |
37 |
3 |
199 |
3044 |
10983 |
265 |
0 |
| VCDI |
0 |
0 |
0 |
7 |
35 |
6001 |
857 |
0 |
|
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