Validation of sea ice concentration - Asian sector
Bulletin date: 2025-06-26
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-06-20:
| 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 |
686 |
2514 |
32 |
49 |
17 |
0 |
0 |
0 |
| OW |
9 |
1313 |
276 |
238 |
5 |
0 |
0 |
0 |
| VODI |
0 |
317 |
286 |
1351 |
378 |
31 |
0 |
0 |
| ODI |
0 |
8 |
22 |
419 |
1361 |
272 |
3 |
0 |
| CDI |
0 |
1 |
4 |
99 |
1318 |
3589 |
826 |
2 |
| VCDI |
0 |
0 |
0 |
0 |
86 |
2819 |
7104 |
7661 |
|
...date precedes bulletin
|
Date: 2025-06-22:
| 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 |
791 |
2492 |
26 |
33 |
21 |
0 |
0 |
0 |
| OW |
10 |
1379 |
238 |
303 |
3 |
1 |
0 |
0 |
| VODI |
0 |
421 |
301 |
1285 |
421 |
33 |
4 |
0 |
| ODI |
0 |
4 |
15 |
496 |
1174 |
347 |
6 |
0 |
| CDI |
0 |
0 |
0 |
109 |
2046 |
3232 |
978 |
116 |
| VCDI |
0 |
0 |
0 |
0 |
371 |
2704 |
5708 |
8028 |
|
...date precedes bulletin
|
Date: 2025-06-24:
| 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 |
931 |
3137 |
56 |
60 |
20 |
0 |
0 |
0 |
| OW |
5 |
1127 |
446 |
414 |
12 |
2 |
0 |
0 |
| VODI |
0 |
17 |
80 |
1598 |
477 |
37 |
5 |
0 |
| ODI |
0 |
0 |
0 |
139 |
1777 |
299 |
32 |
0 |
| CDI |
0 |
0 |
0 |
10 |
1527 |
5740 |
1152 |
4 |
| VCDI |
0 |
0 |
0 |
0 |
878 |
1045 |
9157 |
2912 |
|
...date precedes bulletin
|
Date: 2025-06-26:
| 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 |
998 |
3337 |
58 |
58 |
14 |
0 |
0 |
0 |
| OW |
0 |
1233 |
368 |
344 |
15 |
3 |
0 |
0 |
| VODI |
0 |
84 |
156 |
1373 |
416 |
99 |
1 |
0 |
| ODI |
0 |
2 |
3 |
316 |
1237 |
655 |
32 |
0 |
| CDI |
0 |
0 |
0 |
47 |
1471 |
6627 |
1814 |
21 |
| VCDI |
0 |
0 |
0 |
0 |
5 |
1574 |
7157 |
3578 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
998 |
3555 |
63 |
56 |
14 |
0 |
0 |
0 |
| OW |
0 |
1026 |
365 |
341 |
18 |
6 |
0 |
0 |
| VODI |
0 |
75 |
154 |
1359 |
381 |
102 |
0 |
0 |
| ODI |
0 |
0 |
3 |
331 |
1285 |
597 |
33 |
0 |
| CDI |
0 |
0 |
0 |
51 |
1450 |
6852 |
2135 |
60 |
| VCDI |
0 |
0 |
0 |
0 |
10 |
1401 |
6836 |
3539 |
|
Date: 2025-06-28:
| 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 |
1048 |
3464 |
62 |
55 |
16 |
0 |
0 |
0 |
| OW |
0 |
1431 |
318 |
274 |
20 |
8 |
0 |
0 |
| VODI |
0 |
173 |
199 |
1030 |
464 |
140 |
0 |
0 |
| ODI |
0 |
1 |
7 |
331 |
1255 |
707 |
10 |
0 |
| CDI |
0 |
0 |
0 |
86 |
1656 |
6738 |
1096 |
12 |
| VCDI |
0 |
0 |
0 |
0 |
132 |
1763 |
8970 |
1630 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1048 |
3613 |
66 |
55 |
23 |
0 |
0 |
0 |
| OW |
0 |
1284 |
318 |
316 |
23 |
10 |
0 |
0 |
| VODI |
0 |
168 |
195 |
983 |
401 |
151 |
0 |
0 |
| ODI |
0 |
4 |
7 |
326 |
1367 |
680 |
13 |
0 |
| CDI |
0 |
0 |
0 |
96 |
1593 |
6956 |
1181 |
26 |
| VCDI |
0 |
0 |
0 |
0 |
136 |
1559 |
8882 |
1616 |
|
Date: 2025-06-30:
| 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 |
1129 |
4003 |
66 |
113 |
3 |
0 |
0 |
0 |
| OW |
0 |
1157 |
461 |
644 |
31 |
2 |
0 |
0 |
| VODI |
0 |
19 |
6 |
919 |
473 |
36 |
0 |
0 |
| ODI |
0 |
4 |
1 |
85 |
2100 |
369 |
0 |
0 |
| CDI |
0 |
0 |
0 |
3 |
1368 |
8109 |
398 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
1354 |
7734 |
2509 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1129 |
3450 |
48 |
98 |
15 |
0 |
0 |
0 |
| OW |
0 |
1494 |
284 |
323 |
44 |
10 |
0 |
0 |
| VODI |
0 |
223 |
179 |
770 |
433 |
211 |
2 |
0 |
| ODI |
0 |
15 |
21 |
466 |
1548 |
796 |
11 |
0 |
| CDI |
0 |
1 |
2 |
107 |
1900 |
6804 |
1022 |
4 |
| VCDI |
0 |
0 |
0 |
0 |
35 |
2049 |
7097 |
2505 |
|
Date: 2025-07-02:
| 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 |
1294 |
3921 |
64 |
78 |
10 |
0 |
0 |
0 |
| OW |
22 |
1072 |
381 |
545 |
97 |
2 |
0 |
0 |
| VODI |
0 |
57 |
33 |
929 |
517 |
56 |
0 |
0 |
| ODI |
0 |
1 |
2 |
191 |
2364 |
377 |
7 |
0 |
| CDI |
0 |
0 |
0 |
25 |
2055 |
7277 |
982 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
9 |
2261 |
7813 |
654 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1277 |
3294 |
28 |
51 |
11 |
0 |
0 |
0 |
| OW |
39 |
1480 |
257 |
314 |
120 |
24 |
0 |
0 |
| VODI |
0 |
252 |
158 |
767 |
517 |
281 |
9 |
0 |
| ODI |
0 |
19 |
34 |
476 |
1993 |
868 |
3 |
0 |
| CDI |
0 |
6 |
3 |
150 |
2305 |
5566 |
1562 |
0 |
| VCDI |
0 |
0 |
0 |
10 |
106 |
3234 |
7228 |
654 |
|
Date: 2025-07-04:
| 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 |
5221 |
2 |
276 |
0 |
0 |
0 |
0 |
0 |
| OW |
983 |
46 |
966 |
0 |
0 |
0 |
0 |
0 |
| VODI |
47 |
6 |
1798 |
3 |
0 |
0 |
0 |
0 |
| ODI |
0 |
0 |
3219 |
12 |
0 |
0 |
0 |
0 |
| CDI |
0 |
0 |
8983 |
582 |
0 |
0 |
0 |
0 |
| VCDI |
0 |
0 |
6180 |
3975 |
667 |
124 |
6 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
4649 |
0 |
132 |
0 |
0 |
0 |
0 |
0 |
| OW |
1369 |
32 |
887 |
0 |
0 |
0 |
0 |
0 |
| VODI |
226 |
10 |
1831 |
0 |
0 |
0 |
0 |
0 |
| ODI |
7 |
8 |
3528 |
1 |
0 |
0 |
0 |
0 |
| CDI |
0 |
4 |
8449 |
294 |
0 |
0 |
0 |
0 |
| VCDI |
0 |
0 |
6595 |
4277 |
667 |
124 |
6 |
0 |
|
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