Validation of sea ice concentration - Full domain
Bulletin date: 2025-09-11
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-09-05:
| 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 |
134562 |
11989 |
64 |
40 |
0 |
0 |
0 |
0 |
| OW |
401 |
4315 |
1032 |
1020 |
7 |
0 |
0 |
0 |
| VODI |
18 |
288 |
305 |
5234 |
1003 |
43 |
0 |
0 |
| ODI |
0 |
28 |
1 |
364 |
13102 |
1687 |
0 |
0 |
| CDI |
0 |
20 |
0 |
10 |
1821 |
11907 |
415 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
28 |
3090 |
1949 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-07:
| 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 |
134848 |
11453 |
33 |
19 |
0 |
0 |
0 |
0 |
| OW |
432 |
4727 |
885 |
757 |
2 |
0 |
0 |
0 |
| VODI |
26 |
376 |
483 |
5192 |
999 |
24 |
0 |
0 |
| ODI |
0 |
14 |
3 |
650 |
11718 |
1563 |
0 |
0 |
| CDI |
0 |
7 |
2 |
16 |
2210 |
12379 |
679 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
47 |
3478 |
1721 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-09:
| 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 |
133550 |
14332 |
112 |
35 |
1 |
0 |
0 |
0 |
| OW |
322 |
3460 |
1111 |
1293 |
22 |
0 |
0 |
0 |
| VODI |
2 |
57 |
104 |
4948 |
1084 |
1 |
0 |
0 |
| ODI |
0 |
3 |
1 |
345 |
7860 |
179 |
0 |
0 |
| CDI |
0 |
0 |
0 |
4 |
4906 |
15589 |
271 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
38 |
2842 |
2271 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-11:
| 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 |
132700 |
13979 |
70 |
26 |
0 |
0 |
0 |
0 |
| OW |
245 |
4337 |
896 |
1308 |
54 |
0 |
0 |
0 |
| VODI |
16 |
159 |
234 |
4800 |
1298 |
56 |
0 |
0 |
| ODI |
0 |
13 |
1 |
499 |
5857 |
503 |
0 |
0 |
| CDI |
0 |
1 |
0 |
3 |
3505 |
14420 |
233 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
13 |
6985 |
2532 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
132706 |
14235 |
102 |
39 |
0 |
0 |
0 |
0 |
| OW |
242 |
4046 |
858 |
1393 |
68 |
0 |
0 |
0 |
| VODI |
13 |
192 |
241 |
4629 |
1444 |
52 |
0 |
0 |
| ODI |
0 |
15 |
0 |
572 |
5713 |
662 |
0 |
0 |
| CDI |
0 |
1 |
0 |
3 |
3490 |
14755 |
301 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
12 |
6495 |
2464 |
0 |
|
Date: 2025-09-13:
| 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 |
133874 |
12297 |
60 |
30 |
0 |
0 |
0 |
0 |
| OW |
669 |
4144 |
754 |
1192 |
88 |
0 |
0 |
0 |
| VODI |
18 |
246 |
326 |
4468 |
1664 |
35 |
0 |
0 |
| ODI |
0 |
13 |
0 |
449 |
5175 |
863 |
0 |
0 |
| CDI |
0 |
2 |
1 |
14 |
2758 |
12448 |
110 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
19 |
9108 |
3918 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
133873 |
12311 |
103 |
58 |
0 |
0 |
0 |
0 |
| OW |
668 |
4106 |
749 |
1218 |
85 |
0 |
0 |
0 |
| VODI |
20 |
266 |
288 |
4404 |
1799 |
33 |
0 |
0 |
| ODI |
0 |
17 |
0 |
451 |
5206 |
983 |
0 |
0 |
| CDI |
0 |
2 |
1 |
22 |
2602 |
12634 |
120 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
12 |
8804 |
3908 |
0 |
|
Date: 2025-09-15:
| 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 |
133907 |
14793 |
126 |
98 |
0 |
0 |
0 |
0 |
| OW |
68 |
2638 |
858 |
1609 |
16 |
2 |
0 |
0 |
| VODI |
0 |
38 |
28 |
3499 |
1095 |
9 |
0 |
0 |
| ODI |
0 |
0 |
0 |
119 |
4540 |
44 |
0 |
0 |
| CDI |
0 |
0 |
0 |
4 |
2342 |
13866 |
10 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
56 |
10200 |
4778 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
133408 |
12911 |
156 |
159 |
0 |
0 |
0 |
0 |
| OW |
566 |
4029 |
585 |
1422 |
215 |
10 |
0 |
0 |
| VODI |
1 |
520 |
267 |
3230 |
2192 |
233 |
0 |
0 |
| ODI |
0 |
9 |
4 |
505 |
4004 |
1301 |
0 |
0 |
| CDI |
0 |
0 |
0 |
13 |
1623 |
11597 |
148 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
15 |
10980 |
4640 |
0 |
|
Date: 2025-09-17:
| 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 |
134430 |
14431 |
185 |
109 |
2 |
0 |
0 |
0 |
| OW |
62 |
2415 |
829 |
1600 |
152 |
1 |
0 |
0 |
| VODI |
0 |
68 |
98 |
2993 |
1492 |
11 |
0 |
0 |
| ODI |
0 |
1 |
10 |
275 |
3816 |
273 |
0 |
0 |
| CDI |
0 |
0 |
0 |
52 |
1963 |
11955 |
43 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
128 |
11035 |
6314 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
133937 |
12584 |
194 |
228 |
0 |
0 |
0 |
0 |
| OW |
555 |
3858 |
612 |
1520 |
350 |
0 |
0 |
0 |
| VODI |
0 |
462 |
300 |
2800 |
2174 |
177 |
0 |
0 |
| ODI |
0 |
11 |
15 |
451 |
3898 |
1385 |
0 |
0 |
| CDI |
0 |
0 |
1 |
30 |
1122 |
10185 |
234 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
9 |
11528 |
6123 |
0 |
|
Date: 2025-09-19:
| 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 |
134204 |
14512 |
219 |
121 |
0 |
0 |
0 |
0 |
| OW |
37 |
2573 |
765 |
1423 |
128 |
0 |
0 |
0 |
| VODI |
0 |
173 |
189 |
2260 |
1807 |
67 |
0 |
0 |
| ODI |
0 |
16 |
14 |
304 |
2084 |
1921 |
11 |
0 |
| CDI |
0 |
2 |
3 |
112 |
1415 |
10911 |
728 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
119 |
11671 |
6777 |
177 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
133546 |
12463 |
207 |
346 |
35 |
0 |
0 |
0 |
| OW |
694 |
4187 |
617 |
1137 |
390 |
8 |
0 |
0 |
| VODI |
1 |
602 |
344 |
2372 |
1932 |
328 |
0 |
0 |
| ODI |
0 |
23 |
20 |
313 |
2350 |
3152 |
61 |
0 |
| CDI |
0 |
1 |
2 |
52 |
750 |
8772 |
745 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
96 |
12310 |
6710 |
177 |
|
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