Validation of sea ice concentration - Asian sector
Bulletin date: 2025-09-04
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
12607 |
4455 |
24 |
8 |
0 |
0 |
0 |
0 |
| OW |
25 |
1323 |
356 |
306 |
0 |
0 |
0 |
0 |
| VODI |
0 |
25 |
88 |
1898 |
499 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
133 |
4543 |
726 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1493 |
4587 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-31:
| 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 |
12639 |
4193 |
14 |
8 |
0 |
0 |
0 |
0 |
| OW |
4 |
1525 |
309 |
239 |
0 |
0 |
0 |
0 |
| VODI |
0 |
74 |
178 |
1967 |
616 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
211 |
5533 |
975 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1576 |
3035 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-02:
| 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 |
12495 |
4735 |
26 |
9 |
0 |
0 |
0 |
0 |
| OW |
0 |
1027 |
449 |
588 |
0 |
0 |
0 |
0 |
| VODI |
0 |
4 |
29 |
1877 |
612 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
73 |
7021 |
252 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1012 |
2885 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
2 |
0 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-04:
| 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 |
12410 |
4594 |
33 |
6 |
0 |
0 |
0 |
0 |
| OW |
0 |
1257 |
377 |
471 |
0 |
0 |
0 |
0 |
| VODI |
0 |
37 |
82 |
2046 |
541 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
84 |
6329 |
571 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
918 |
3340 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12410 |
4624 |
40 |
7 |
0 |
0 |
0 |
0 |
| OW |
0 |
1237 |
374 |
488 |
0 |
0 |
0 |
0 |
| VODI |
0 |
27 |
78 |
2003 |
541 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
109 |
6275 |
697 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
972 |
3205 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
9 |
0 |
0 |
|
Date: 2025-09-06:
| 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 |
12385 |
4342 |
12 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
1348 |
382 |
372 |
3 |
0 |
0 |
0 |
| VODI |
0 |
63 |
103 |
2190 |
619 |
2 |
0 |
0 |
| ODI |
0 |
0 |
0 |
75 |
5680 |
1004 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
783 |
3733 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12385 |
4426 |
16 |
1 |
0 |
0 |
0 |
0 |
| OW |
0 |
1291 |
392 |
478 |
3 |
0 |
0 |
0 |
| VODI |
0 |
36 |
89 |
2020 |
620 |
3 |
0 |
0 |
| ODI |
0 |
0 |
0 |
138 |
5618 |
1253 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
844 |
3483 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Date: 2025-09-08:
| 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 |
12358 |
4283 |
31 |
5 |
0 |
0 |
0 |
0 |
| OW |
0 |
1384 |
302 |
469 |
11 |
0 |
0 |
0 |
| VODI |
0 |
68 |
107 |
2007 |
639 |
2 |
0 |
0 |
| ODI |
0 |
0 |
0 |
154 |
4546 |
1382 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1262 |
4086 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12358 |
4143 |
12 |
2 |
0 |
0 |
0 |
0 |
| OW |
0 |
1532 |
313 |
461 |
9 |
0 |
0 |
0 |
| VODI |
0 |
60 |
115 |
1961 |
664 |
12 |
0 |
0 |
| ODI |
0 |
0 |
0 |
211 |
4634 |
1531 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1151 |
3927 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Date: 2025-09-10:
| 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 |
12277 |
4992 |
78 |
37 |
0 |
0 |
0 |
0 |
| OW |
0 |
640 |
388 |
668 |
21 |
0 |
0 |
0 |
| VODI |
0 |
0 |
15 |
1751 |
567 |
6 |
0 |
0 |
| ODI |
0 |
0 |
0 |
196 |
2571 |
398 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1428 |
6866 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
197 |
0 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12277 |
4077 |
18 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
1490 |
338 |
586 |
32 |
0 |
0 |
0 |
| VODI |
0 |
65 |
125 |
1771 |
821 |
88 |
0 |
0 |
| ODI |
0 |
0 |
0 |
295 |
2611 |
2041 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1123 |
5338 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Date: 2025-09-12:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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