Validation of sea ice concentration - Asian sector
Bulletin date: 2025-06-05
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-05-30:
| 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 |
151 |
835 |
1 |
9 |
3 |
0 |
0 |
0 |
| OW |
0 |
885 |
139 |
142 |
24 |
1 |
2 |
0 |
| VODI |
0 |
242 |
187 |
789 |
138 |
22 |
11 |
0 |
| ODI |
0 |
50 |
37 |
385 |
1277 |
167 |
46 |
0 |
| CDI |
0 |
3 |
5 |
162 |
1505 |
3969 |
1254 |
3 |
| VCDI |
0 |
0 |
0 |
0 |
123 |
2335 |
8494 |
9700 |
|
...date precedes bulletin
|
Date: 2025-06-01:
| 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 |
259 |
732 |
1 |
16 |
2 |
0 |
4 |
0 |
| OW |
0 |
976 |
128 |
84 |
26 |
4 |
15 |
0 |
| VODI |
0 |
449 |
214 |
661 |
125 |
45 |
46 |
0 |
| ODI |
0 |
86 |
43 |
473 |
1154 |
258 |
156 |
0 |
| CDI |
0 |
11 |
16 |
239 |
1433 |
3841 |
1709 |
6 |
| VCDI |
0 |
0 |
0 |
0 |
167 |
2163 |
7793 |
9761 |
|
...date precedes bulletin
|
Date: 2025-06-03:
| 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 |
150 |
1155 |
17 |
25 |
4 |
1 |
5 |
0 |
| OW |
0 |
1137 |
281 |
312 |
32 |
6 |
12 |
0 |
| VODI |
0 |
65 |
124 |
1084 |
260 |
19 |
29 |
0 |
| ODI |
0 |
5 |
1 |
218 |
1791 |
195 |
70 |
0 |
| CDI |
0 |
0 |
0 |
30 |
800 |
4452 |
1102 |
11 |
| VCDI |
0 |
0 |
0 |
0 |
61 |
1920 |
9074 |
8648 |
|
...date precedes bulletin
|
Date: 2025-06-05:
| 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 |
230 |
1144 |
23 |
32 |
0 |
0 |
1 |
0 |
| OW |
0 |
1269 |
243 |
294 |
36 |
5 |
4 |
0 |
| VODI |
0 |
130 |
160 |
1019 |
277 |
49 |
8 |
0 |
| ODI |
0 |
10 |
4 |
339 |
1523 |
286 |
102 |
0 |
| CDI |
0 |
0 |
0 |
62 |
1191 |
4006 |
1580 |
69 |
| VCDI |
0 |
0 |
0 |
0 |
30 |
1189 |
8535 |
9246 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
230 |
1143 |
18 |
30 |
0 |
1 |
1 |
0 |
| OW |
0 |
1250 |
239 |
281 |
37 |
2 |
0 |
0 |
| VODI |
0 |
152 |
166 |
1042 |
256 |
50 |
9 |
0 |
| ODI |
0 |
8 |
7 |
323 |
1580 |
265 |
113 |
0 |
| CDI |
0 |
0 |
0 |
70 |
1153 |
3999 |
1584 |
59 |
| VCDI |
0 |
0 |
0 |
0 |
31 |
1218 |
8523 |
9256 |
|
Date: 2025-06-07:
| 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 |
157 |
1204 |
27 |
26 |
1 |
0 |
0 |
0 |
| OW |
0 |
1445 |
199 |
177 |
24 |
5 |
0 |
0 |
| VODI |
0 |
270 |
220 |
984 |
259 |
50 |
14 |
0 |
| ODI |
0 |
9 |
10 |
538 |
1659 |
195 |
157 |
7 |
| CDI |
0 |
0 |
0 |
62 |
1559 |
3294 |
1469 |
62 |
| VCDI |
0 |
0 |
0 |
0 |
56 |
1240 |
7117 |
10600 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
157 |
1225 |
15 |
22 |
3 |
1 |
0 |
0 |
| OW |
0 |
1375 |
193 |
209 |
27 |
5 |
0 |
0 |
| VODI |
0 |
319 |
235 |
934 |
239 |
50 |
22 |
0 |
| ODI |
0 |
9 |
13 |
549 |
1695 |
229 |
163 |
5 |
| CDI |
0 |
0 |
0 |
73 |
1532 |
3144 |
1437 |
62 |
| VCDI |
0 |
0 |
0 |
0 |
62 |
1355 |
7135 |
10602 |
|
Date: 2025-06-09:
| 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 |
300 |
1755 |
16 |
17 |
3 |
0 |
0 |
0 |
| OW |
0 |
1210 |
436 |
217 |
32 |
10 |
0 |
0 |
| VODI |
0 |
61 |
46 |
1463 |
308 |
18 |
4 |
0 |
| ODI |
0 |
10 |
2 |
198 |
2340 |
203 |
10 |
0 |
| CDI |
0 |
0 |
0 |
1 |
728 |
4658 |
726 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
601 |
8128 |
9593 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
300 |
1179 |
9 |
24 |
7 |
1 |
0 |
0 |
| OW |
0 |
1427 |
165 |
154 |
45 |
5 |
0 |
0 |
| VODI |
0 |
408 |
298 |
969 |
281 |
63 |
20 |
0 |
| ODI |
0 |
21 |
27 |
648 |
1618 |
328 |
172 |
0 |
| CDI |
0 |
1 |
1 |
101 |
1410 |
4021 |
1926 |
35 |
| VCDI |
0 |
0 |
0 |
0 |
52 |
1072 |
6750 |
9558 |
|
Date: 2025-06-11:
| 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 |
382 |
1976 |
28 |
17 |
3 |
0 |
1 |
0 |
| OW |
17 |
1022 |
379 |
324 |
50 |
9 |
0 |
0 |
| VODI |
12 |
112 |
80 |
1361 |
393 |
22 |
5 |
0 |
| ODI |
0 |
6 |
4 |
276 |
1835 |
410 |
41 |
0 |
| CDI |
0 |
0 |
0 |
31 |
996 |
4178 |
2846 |
70 |
| VCDI |
0 |
0 |
0 |
0 |
245 |
757 |
5468 |
9740 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
389 |
1210 |
5 |
24 |
7 |
0 |
1 |
0 |
| OW |
15 |
1402 |
159 |
147 |
45 |
4 |
0 |
0 |
| VODI |
7 |
484 |
312 |
1014 |
315 |
78 |
46 |
0 |
| ODI |
0 |
19 |
14 |
725 |
1450 |
517 |
190 |
0 |
| CDI |
0 |
1 |
1 |
99 |
1470 |
4177 |
2880 |
103 |
| VCDI |
0 |
0 |
0 |
0 |
235 |
600 |
5244 |
9707 |
|
Date: 2025-06-13:
| 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 |
403 |
2072 |
41 |
39 |
2 |
2 |
0 |
0 |
| OW |
13 |
1097 |
299 |
298 |
32 |
1 |
0 |
0 |
| VODI |
10 |
139 |
139 |
1293 |
452 |
26 |
7 |
0 |
| ODI |
0 |
5 |
6 |
343 |
1603 |
424 |
43 |
0 |
| CDI |
0 |
0 |
1 |
37 |
1067 |
4169 |
2473 |
34 |
| VCDI |
0 |
0 |
0 |
0 |
371 |
859 |
5544 |
9752 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
407 |
1192 |
14 |
22 |
9 |
2 |
0 |
0 |
| OW |
17 |
1398 |
132 |
168 |
30 |
1 |
5 |
0 |
| VODI |
2 |
708 |
305 |
925 |
392 |
112 |
75 |
0 |
| ODI |
0 |
14 |
33 |
804 |
1414 |
629 |
144 |
0 |
| CDI |
0 |
1 |
2 |
91 |
1393 |
4330 |
2824 |
1 |
| VCDI |
0 |
0 |
0 |
0 |
289 |
407 |
5019 |
9785 |
|
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