Validation of sea ice concentration - Asian sector
Bulletin date: 2025-07-10
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2025-07-06:
| 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 |
1907 |
3602 |
46 |
67 |
36 |
6 |
0 |
0 |
| OW |
92 |
1209 |
273 |
239 |
89 |
54 |
0 |
0 |
| VODI |
1 |
122 |
121 |
1046 |
591 |
146 |
0 |
0 |
| ODI |
0 |
17 |
13 |
392 |
2625 |
366 |
1 |
0 |
| CDI |
0 |
4 |
10 |
120 |
2588 |
6755 |
451 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
13 |
1822 |
7107 |
1165 |
|
...date precedes bulletin
|
Date: 2025-07-08:
| 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 |
2195 |
4344 |
75 |
74 |
14 |
0 |
0 |
0 |
| OW |
69 |
769 |
345 |
640 |
42 |
6 |
0 |
0 |
| VODI |
1 |
31 |
23 |
1343 |
488 |
21 |
0 |
0 |
| ODI |
0 |
0 |
0 |
209 |
2654 |
172 |
0 |
0 |
| CDI |
0 |
0 |
0 |
13 |
2476 |
7769 |
14 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
11 |
3589 |
5563 |
146 |
|
...date precedes bulletin
|
Date: 2025-07-10:
| 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 |
2171 |
4742 |
75 |
57 |
8 |
0 |
0 |
0 |
| OW |
49 |
814 |
323 |
461 |
101 |
0 |
0 |
0 |
| VODI |
1 |
180 |
97 |
1317 |
587 |
5 |
0 |
0 |
| ODI |
0 |
10 |
25 |
421 |
2074 |
179 |
0 |
0 |
| CDI |
0 |
0 |
3 |
121 |
4848 |
5912 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3003 |
5482 |
30 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
2172 |
4797 |
78 |
70 |
8 |
0 |
0 |
0 |
| OW |
48 |
769 |
311 |
444 |
97 |
0 |
0 |
0 |
| VODI |
1 |
162 |
101 |
1317 |
576 |
10 |
0 |
0 |
| ODI |
0 |
17 |
31 |
422 |
2087 |
344 |
0 |
0 |
| CDI |
0 |
1 |
2 |
124 |
5005 |
5737 |
1 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2848 |
5487 |
29 |
0 |
|
Date: 2025-07-12:
| 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 |
2912 |
3994 |
51 |
40 |
10 |
1 |
0 |
0 |
| OW |
32 |
969 |
261 |
543 |
80 |
8 |
0 |
0 |
| VODI |
1 |
266 |
137 |
1497 |
703 |
6 |
0 |
0 |
| ODI |
0 |
38 |
19 |
575 |
2008 |
77 |
0 |
0 |
| CDI |
0 |
1 |
12 |
179 |
3442 |
7264 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
28 |
7739 |
203 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
2911 |
4117 |
74 |
56 |
17 |
1 |
0 |
0 |
| OW |
33 |
870 |
223 |
549 |
82 |
9 |
0 |
0 |
| VODI |
1 |
238 |
152 |
1499 |
697 |
8 |
0 |
0 |
| ODI |
0 |
38 |
21 |
576 |
1773 |
271 |
0 |
0 |
| CDI |
0 |
5 |
10 |
154 |
3672 |
6918 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
30 |
7888 |
203 |
0 |
|
Date: 2025-07-14:
| 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 |
3158 |
4216 |
51 |
45 |
3 |
0 |
0 |
0 |
| OW |
22 |
1171 |
497 |
946 |
45 |
0 |
0 |
0 |
| VODI |
0 |
30 |
58 |
1848 |
633 |
0 |
0 |
0 |
| ODI |
0 |
1 |
0 |
170 |
3673 |
37 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1766 |
12679 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
2044 |
0 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
3132 |
3856 |
34 |
34 |
11 |
0 |
0 |
0 |
| OW |
48 |
1136 |
276 |
480 |
99 |
0 |
0 |
0 |
| VODI |
0 |
353 |
232 |
1555 |
516 |
19 |
0 |
0 |
| ODI |
0 |
71 |
47 |
689 |
1832 |
356 |
0 |
0 |
| CDI |
0 |
2 |
17 |
251 |
3596 |
7685 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
69 |
6700 |
0 |
0 |
|
Date: 2025-07-16:
| 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 |
3243 |
4199 |
55 |
57 |
3 |
0 |
0 |
0 |
| OW |
12 |
1311 |
440 |
927 |
70 |
0 |
0 |
0 |
| VODI |
0 |
74 |
108 |
1769 |
698 |
2 |
0 |
0 |
| ODI |
0 |
1 |
0 |
219 |
3400 |
72 |
0 |
0 |
| CDI |
0 |
0 |
0 |
5 |
1757 |
13214 |
462 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
591 |
407 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
3206 |
3754 |
39 |
66 |
16 |
0 |
0 |
0 |
| OW |
49 |
1265 |
212 |
632 |
138 |
0 |
0 |
0 |
| VODI |
0 |
488 |
285 |
1320 |
626 |
21 |
0 |
0 |
| ODI |
0 |
72 |
53 |
662 |
1894 |
291 |
0 |
0 |
| CDI |
0 |
6 |
14 |
297 |
3241 |
8326 |
90 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
13 |
5241 |
779 |
0 |
|
Date: 2025-07-18:
| 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 |
3157 |
4345 |
54 |
68 |
4 |
0 |
0 |
0 |
| OW |
8 |
1749 |
433 |
896 |
46 |
0 |
0 |
0 |
| VODI |
0 |
171 |
180 |
2017 |
476 |
0 |
0 |
0 |
| ODI |
0 |
1 |
1 |
469 |
3091 |
35 |
0 |
0 |
| CDI |
0 |
0 |
0 |
33 |
2876 |
11418 |
1215 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
347 |
6 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
3135 |
3844 |
39 |
76 |
7 |
0 |
0 |
0 |
| OW |
30 |
1566 |
258 |
713 |
67 |
0 |
0 |
0 |
| VODI |
0 |
725 |
260 |
1467 |
444 |
0 |
0 |
0 |
| ODI |
0 |
125 |
94 |
853 |
1810 |
119 |
0 |
0 |
| CDI |
0 |
6 |
17 |
374 |
4020 |
7878 |
273 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
145 |
3803 |
948 |
0 |
|
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