Validation of sea ice concentration - Asian sector
Bulletin date: 2025-08-14
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-08-08:
| 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 |
7769 |
6454 |
29 |
11 |
0 |
0 |
0 |
0 |
| OW |
62 |
1881 |
339 |
446 |
1 |
0 |
0 |
0 |
| VODI |
0 |
184 |
146 |
1412 |
406 |
0 |
0 |
0 |
| ODI |
0 |
0 |
6 |
245 |
3011 |
894 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1645 |
7986 |
142 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
9 |
18 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-10:
| 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 |
8390 |
5663 |
6 |
7 |
0 |
0 |
0 |
0 |
| OW |
203 |
2094 |
298 |
249 |
1 |
0 |
0 |
0 |
| VODI |
2 |
262 |
240 |
1523 |
283 |
0 |
0 |
0 |
| ODI |
0 |
8 |
12 |
479 |
2769 |
1263 |
10 |
0 |
| CDI |
0 |
0 |
0 |
44 |
4016 |
4665 |
566 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
43 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-12:
| 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 |
9861 |
4913 |
20 |
3 |
0 |
0 |
0 |
0 |
| OW |
473 |
1510 |
404 |
463 |
0 |
0 |
0 |
0 |
| VODI |
2 |
38 |
67 |
1597 |
363 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
70 |
4723 |
361 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1744 |
6314 |
45 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
45 |
80 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-14:
| 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 |
10536 |
4140 |
17 |
1 |
0 |
0 |
0 |
0 |
| OW |
679 |
1464 |
355 |
274 |
0 |
0 |
0 |
0 |
| VODI |
25 |
54 |
125 |
1736 |
307 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
145 |
4454 |
565 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1373 |
6846 |
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 |
10591 |
4285 |
23 |
3 |
0 |
0 |
0 |
0 |
| OW |
614 |
1317 |
354 |
338 |
0 |
0 |
0 |
0 |
| VODI |
35 |
56 |
120 |
1618 |
328 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
197 |
4346 |
961 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1460 |
6442 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
8 |
0 |
0 |
|
Date: 2025-08-16:
| 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 |
10742 |
4041 |
10 |
1 |
0 |
0 |
0 |
0 |
| OW |
625 |
1521 |
303 |
222 |
0 |
0 |
0 |
0 |
| VODI |
0 |
170 |
187 |
1746 |
424 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
213 |
4645 |
394 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1731 |
6121 |
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 |
10806 |
4152 |
14 |
0 |
0 |
0 |
0 |
0 |
| OW |
551 |
1433 |
311 |
313 |
0 |
0 |
0 |
0 |
| VODI |
10 |
147 |
175 |
1578 |
438 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
291 |
4734 |
1109 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1628 |
5406 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Date: 2025-08-18:
| 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 |
11350 |
4458 |
14 |
25 |
0 |
0 |
0 |
0 |
| OW |
261 |
1136 |
415 |
792 |
1 |
0 |
0 |
0 |
| VODI |
0 |
4 |
11 |
1391 |
605 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
44 |
7390 |
232 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
705 |
4258 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
1 |
3 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11126 |
3864 |
22 |
12 |
0 |
0 |
0 |
0 |
| OW |
485 |
1582 |
256 |
325 |
3 |
0 |
0 |
0 |
| VODI |
0 |
152 |
162 |
1525 |
723 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
390 |
5712 |
417 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
2263 |
4074 |
3 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Date: 2025-08-20:
| 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 |
11539 |
4454 |
30 |
25 |
0 |
0 |
0 |
0 |
| OW |
241 |
1228 |
428 |
560 |
0 |
0 |
0 |
0 |
| VODI |
0 |
12 |
47 |
1497 |
638 |
3 |
0 |
0 |
| ODI |
0 |
0 |
0 |
94 |
6060 |
1364 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1214 |
3662 |
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 |
11343 |
3799 |
45 |
33 |
0 |
0 |
0 |
0 |
| OW |
437 |
1679 |
246 |
347 |
7 |
0 |
0 |
0 |
| VODI |
0 |
216 |
214 |
1480 |
774 |
17 |
0 |
0 |
| ODI |
0 |
0 |
0 |
316 |
4953 |
804 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
2178 |
4208 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Date: 2025-08-22:
| 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 |
11411 |
4723 |
30 |
12 |
0 |
0 |
0 |
0 |
| OW |
205 |
1356 |
373 |
386 |
0 |
0 |
0 |
0 |
| VODI |
0 |
30 |
90 |
1546 |
782 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
86 |
5317 |
1404 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1554 |
3705 |
86 |
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 |
11211 |
4179 |
30 |
8 |
0 |
0 |
0 |
0 |
| OW |
405 |
1735 |
264 |
446 |
45 |
1 |
0 |
0 |
| VODI |
0 |
195 |
199 |
1332 |
985 |
63 |
0 |
0 |
| ODI |
0 |
0 |
0 |
238 |
3867 |
1178 |
86 |
0 |
| CDI |
0 |
0 |
0 |
6 |
2756 |
3867 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
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