Validation of sea ice concentration - American sector
Bulletin date: 2025-09-23
Data source: OSI SAF N.H. sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-09-23:
| Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
16512 |
4494 |
1 |
7 |
0 |
0 |
0 |
0 |
| OW |
79 |
416 |
5 |
15 |
1 |
0 |
0 |
0 |
| VODI |
333 |
1290 |
25 |
130 |
42 |
38 |
7 |
0 |
| ODI |
253 |
2160 |
71 |
703 |
448 |
254 |
61 |
0 |
| CDI |
3 |
89 |
17 |
428 |
1033 |
1414 |
646 |
0 |
| VCDI |
0 |
2 |
0 |
37 |
498 |
3666 |
8977 |
1402 |
|
Date: 2025-09-25:
| Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
16262 |
5704 |
9 |
48 |
9 |
0 |
0 |
0 |
| OW |
31 |
494 |
5 |
19 |
9 |
0 |
0 |
0 |
| VODI |
60 |
1141 |
17 |
103 |
24 |
7 |
0 |
0 |
| ODI |
14 |
1577 |
63 |
650 |
418 |
235 |
26 |
0 |
| CDI |
0 |
79 |
8 |
462 |
877 |
1407 |
739 |
13 |
| VCDI |
0 |
1 |
0 |
46 |
361 |
3117 |
9051 |
2471 |
|
Date: 2025-09-27:
| Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
16003 |
5587 |
16 |
66 |
3 |
1 |
0 |
0 |
| OW |
4 |
717 |
2 |
32 |
3 |
4 |
0 |
0 |
| VODI |
6 |
1083 |
29 |
125 |
22 |
7 |
1 |
0 |
| ODI |
3 |
1452 |
48 |
474 |
303 |
217 |
65 |
2 |
| CDI |
0 |
100 |
11 |
254 |
695 |
1076 |
1162 |
150 |
| VCDI |
0 |
6 |
0 |
20 |
193 |
1864 |
9242 |
4509 |
|
Date: 2025-09-29:
| Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15309 |
5099 |
23 |
103 |
52 |
2 |
0 |
0 |
| OW |
0 |
604 |
5 |
40 |
11 |
1 |
0 |
0 |
| VODI |
0 |
1079 |
22 |
178 |
60 |
16 |
0 |
0 |
| ODI |
0 |
1046 |
36 |
736 |
308 |
81 |
25 |
0 |
| CDI |
0 |
393 |
13 |
481 |
728 |
960 |
883 |
59 |
| VCDI |
0 |
5 |
0 |
33 |
316 |
2029 |
12778 |
2043 |
|
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