Validation of sea ice concentration - Asian sector
Bulletin date: 2025-09-04
Data source: OSI SAF N.H. AMSR 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 |
11615 |
4450 |
15 |
4 |
0 |
0 |
0 |
0 |
| OW |
22 |
1579 |
266 |
137 |
2 |
0 |
0 |
0 |
| VODI |
0 |
159 |
319 |
1456 |
565 |
11 |
0 |
0 |
| ODI |
0 |
1 |
5 |
468 |
4055 |
873 |
0 |
0 |
| CDI |
0 |
0 |
0 |
10 |
1675 |
4361 |
34 |
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 |
11672 |
4157 |
9 |
5 |
0 |
0 |
0 |
0 |
| OW |
3 |
1720 |
202 |
138 |
11 |
0 |
0 |
0 |
| VODI |
0 |
301 |
353 |
1484 |
682 |
15 |
0 |
0 |
| ODI |
0 |
2 |
17 |
617 |
4650 |
1428 |
5 |
0 |
| CDI |
0 |
0 |
0 |
15 |
1491 |
3104 |
1 |
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 |
11502 |
4735 |
14 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
1491 |
357 |
212 |
4 |
0 |
0 |
0 |
| VODI |
0 |
44 |
222 |
1785 |
471 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
436 |
5852 |
1058 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
822 |
3075 |
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 |
11572 |
4453 |
8 |
1 |
0 |
0 |
0 |
0 |
| OW |
0 |
1603 |
299 |
194 |
4 |
0 |
0 |
0 |
| VODI |
0 |
162 |
303 |
1711 |
524 |
6 |
0 |
0 |
| ODI |
0 |
0 |
0 |
516 |
5143 |
1325 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
757 |
3499 |
2 |
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 |
11572 |
4498 |
6 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
1543 |
309 |
232 |
6 |
0 |
0 |
0 |
| VODI |
0 |
177 |
295 |
1646 |
525 |
6 |
0 |
0 |
| ODI |
0 |
0 |
0 |
543 |
5090 |
1448 |
0 |
0 |
| CDI |
0 |
0 |
0 |
1 |
807 |
3367 |
2 |
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 |
11507 |
4229 |
2 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
1644 |
243 |
194 |
11 |
0 |
0 |
0 |
| VODI |
0 |
219 |
347 |
1710 |
677 |
24 |
0 |
0 |
| ODI |
0 |
0 |
0 |
526 |
4377 |
1856 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
746 |
3770 |
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 |
11507 |
4317 |
3 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
1566 |
280 |
284 |
21 |
0 |
0 |
0 |
| VODI |
0 |
209 |
309 |
1538 |
682 |
30 |
0 |
0 |
| ODI |
0 |
0 |
0 |
607 |
4337 |
2065 |
0 |
0 |
| CDI |
0 |
0 |
0 |
1 |
771 |
3555 |
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 |
11583 |
4090 |
2 |
1 |
0 |
0 |
0 |
0 |
| OW |
0 |
1581 |
263 |
264 |
45 |
0 |
0 |
0 |
| VODI |
0 |
244 |
285 |
1548 |
704 |
42 |
0 |
0 |
| ODI |
0 |
0 |
4 |
517 |
3469 |
2089 |
3 |
0 |
| CDI |
0 |
0 |
0 |
1 |
1043 |
4286 |
18 |
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 |
11583 |
3939 |
1 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
1724 |
269 |
265 |
35 |
0 |
0 |
0 |
| VODI |
0 |
250 |
278 |
1492 |
723 |
69 |
0 |
0 |
| ODI |
0 |
2 |
6 |
573 |
3537 |
2255 |
3 |
0 |
| CDI |
0 |
0 |
0 |
1 |
966 |
4093 |
18 |
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 |
11554 |
4795 |
26 |
6 |
0 |
0 |
0 |
0 |
| OW |
0 |
1056 |
339 |
280 |
34 |
0 |
0 |
0 |
| VODI |
0 |
52 |
200 |
1508 |
545 |
31 |
0 |
0 |
| ODI |
0 |
0 |
0 |
316 |
2128 |
719 |
2 |
0 |
| CDI |
0 |
0 |
0 |
1 |
1181 |
7103 |
9 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
181 |
16 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11554 |
3825 |
1 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
1798 |
264 |
310 |
52 |
3 |
0 |
0 |
| VODI |
0 |
272 |
293 |
1335 |
777 |
190 |
0 |
0 |
| ODI |
0 |
8 |
7 |
461 |
2051 |
2414 |
6 |
0 |
| CDI |
0 |
0 |
0 |
5 |
1008 |
5427 |
21 |
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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