Validation of sea ice concentration - Asian sector
Bulletin date: 2025-09-18
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-09-12:
| 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 |
12246 |
4702 |
17 |
1 |
0 |
0 |
0 |
0 |
| OW |
0 |
1026 |
362 |
557 |
50 |
0 |
0 |
0 |
| VODI |
0 |
15 |
72 |
1711 |
743 |
12 |
0 |
0 |
| ODI |
0 |
0 |
0 |
86 |
1606 |
417 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
548 |
7777 |
213 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
615 |
317 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-14:
| 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 |
12161 |
4695 |
12 |
4 |
0 |
0 |
0 |
0 |
| OW |
0 |
1105 |
334 |
602 |
41 |
0 |
0 |
0 |
| VODI |
0 |
63 |
113 |
1605 |
861 |
16 |
0 |
0 |
| ODI |
0 |
0 |
0 |
79 |
1236 |
422 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
531 |
5983 |
19 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
2981 |
230 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-16:
| 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 |
12216 |
5229 |
55 |
6 |
0 |
0 |
0 |
0 |
| OW |
0 |
621 |
402 |
666 |
7 |
0 |
0 |
0 |
| VODI |
0 |
0 |
8 |
1325 |
366 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
68 |
1159 |
44 |
0 |
0 |
| CDI |
0 |
0 |
0 |
3 |
764 |
6742 |
183 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
11 |
1517 |
1704 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-18:
| 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 |
12506 |
5147 |
50 |
5 |
0 |
0 |
0 |
0 |
| OW |
0 |
783 |
324 |
506 |
25 |
0 |
0 |
0 |
| VODI |
0 |
37 |
68 |
1216 |
406 |
8 |
0 |
0 |
| ODI |
0 |
8 |
5 |
142 |
900 |
156 |
0 |
0 |
| CDI |
0 |
0 |
3 |
38 |
409 |
6191 |
77 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
66 |
3409 |
611 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12506 |
5179 |
86 |
14 |
0 |
0 |
0 |
0 |
| OW |
0 |
762 |
294 |
493 |
20 |
0 |
0 |
0 |
| VODI |
0 |
27 |
62 |
1198 |
363 |
8 |
0 |
0 |
| ODI |
0 |
7 |
6 |
167 |
922 |
152 |
0 |
0 |
| CDI |
0 |
0 |
2 |
35 |
425 |
6029 |
165 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
76 |
3575 |
523 |
0 |
|
Date: 2025-09-20:
| 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 |
12842 |
4921 |
23 |
4 |
0 |
0 |
0 |
0 |
| OW |
0 |
816 |
313 |
489 |
42 |
0 |
0 |
0 |
| VODI |
0 |
81 |
85 |
871 |
597 |
51 |
0 |
0 |
| ODI |
0 |
19 |
11 |
130 |
620 |
500 |
0 |
0 |
| CDI |
0 |
1 |
7 |
42 |
344 |
4784 |
984 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
3866 |
653 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12842 |
5021 |
58 |
18 |
0 |
0 |
0 |
0 |
| OW |
0 |
745 |
284 |
480 |
49 |
0 |
0 |
0 |
| VODI |
0 |
54 |
82 |
853 |
531 |
51 |
0 |
0 |
| ODI |
0 |
17 |
9 |
138 |
650 |
474 |
0 |
0 |
| CDI |
0 |
1 |
6 |
47 |
369 |
4759 |
763 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
4 |
3917 |
874 |
0 |
|
Date: 2025-09-22:
| 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 |
12548 |
5374 |
148 |
55 |
0 |
0 |
0 |
0 |
| OW |
0 |
222 |
210 |
675 |
53 |
0 |
0 |
0 |
| VODI |
0 |
6 |
21 |
490 |
534 |
70 |
0 |
0 |
| ODI |
0 |
0 |
0 |
28 |
625 |
253 |
12 |
0 |
| CDI |
0 |
0 |
0 |
0 |
282 |
1549 |
55 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
2721 |
6999 |
163 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12548 |
5129 |
100 |
57 |
0 |
0 |
0 |
0 |
| OW |
0 |
462 |
226 |
523 |
146 |
0 |
0 |
0 |
| VODI |
0 |
11 |
53 |
582 |
676 |
271 |
8 |
0 |
| ODI |
0 |
0 |
0 |
78 |
482 |
626 |
72 |
0 |
| CDI |
0 |
0 |
0 |
8 |
193 |
1553 |
596 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
2143 |
6390 |
163 |
|
Date: 2025-09-24:
| 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 |
12393 |
5391 |
105 |
34 |
0 |
0 |
0 |
0 |
| OW |
0 |
248 |
261 |
574 |
8 |
0 |
0 |
0 |
| VODI |
0 |
0 |
14 |
565 |
414 |
20 |
0 |
0 |
| ODI |
0 |
0 |
0 |
95 |
646 |
154 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
394 |
1233 |
149 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
19 |
1642 |
7456 |
1281 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12393 |
5004 |
78 |
69 |
0 |
0 |
0 |
0 |
| OW |
0 |
602 |
195 |
443 |
114 |
1 |
0 |
0 |
| VODI |
0 |
33 |
107 |
559 |
543 |
125 |
0 |
0 |
| ODI |
0 |
0 |
0 |
190 |
548 |
593 |
18 |
0 |
| CDI |
0 |
0 |
0 |
7 |
253 |
1084 |
675 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
23 |
1246 |
6912 |
1281 |
|
Date: 2025-09-26:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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