Validation of sea ice concentration - American sector
Bulletin date: 2025-09-04
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-08-29:
| 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 |
30132 |
4346 |
36 |
19 |
0 |
0 |
0 |
0 |
| OW |
263 |
3817 |
511 |
776 |
4 |
0 |
0 |
0 |
| VODI |
3 |
164 |
150 |
2422 |
855 |
0 |
0 |
0 |
| ODI |
0 |
15 |
1 |
129 |
3540 |
474 |
0 |
0 |
| CDI |
0 |
7 |
0 |
26 |
909 |
8479 |
133 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
27 |
3412 |
581 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-31:
| 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 |
30449 |
3547 |
16 |
22 |
0 |
0 |
0 |
0 |
| OW |
234 |
4475 |
410 |
402 |
24 |
0 |
0 |
0 |
| VODI |
3 |
198 |
239 |
2628 |
446 |
0 |
0 |
0 |
| ODI |
0 |
23 |
0 |
263 |
3794 |
154 |
0 |
0 |
| CDI |
0 |
23 |
1 |
13 |
2397 |
7632 |
290 |
0 |
| VCDI |
0 |
1 |
0 |
0 |
17 |
2391 |
1139 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-02:
| 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 |
31051 |
5892 |
12 |
0 |
0 |
0 |
0 |
0 |
| OW |
101 |
2560 |
570 |
626 |
3 |
0 |
0 |
0 |
| VODI |
2 |
75 |
87 |
2139 |
673 |
0 |
0 |
0 |
| ODI |
0 |
18 |
0 |
66 |
5280 |
308 |
0 |
0 |
| CDI |
0 |
19 |
0 |
3 |
860 |
7353 |
245 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
15 |
2199 |
1074 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-04:
| 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 |
32157 |
4928 |
7 |
0 |
0 |
0 |
0 |
0 |
| OW |
359 |
2391 |
526 |
400 |
0 |
0 |
0 |
0 |
| VODI |
8 |
147 |
160 |
2446 |
469 |
14 |
0 |
0 |
| ODI |
0 |
22 |
1 |
127 |
5105 |
411 |
1 |
0 |
| CDI |
0 |
27 |
0 |
2 |
770 |
6680 |
879 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
17 |
1810 |
1367 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
32153 |
4969 |
34 |
3 |
0 |
0 |
0 |
0 |
| OW |
360 |
2337 |
505 |
461 |
0 |
0 |
0 |
0 |
| VODI |
11 |
159 |
154 |
2414 |
660 |
16 |
0 |
0 |
| ODI |
0 |
22 |
1 |
95 |
4850 |
487 |
1 |
0 |
| CDI |
0 |
28 |
0 |
2 |
839 |
6764 |
955 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
12 |
1648 |
1291 |
0 |
|
Date: 2025-09-06:
| 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 |
32020 |
4878 |
24 |
5 |
0 |
0 |
0 |
0 |
| OW |
370 |
2543 |
437 |
457 |
1 |
0 |
0 |
0 |
| VODI |
2 |
197 |
200 |
2593 |
463 |
41 |
0 |
0 |
| ODI |
0 |
29 |
0 |
203 |
4828 |
387 |
0 |
0 |
| CDI |
0 |
16 |
4 |
6 |
686 |
7322 |
240 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
37 |
2783 |
459 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
32029 |
4985 |
49 |
13 |
0 |
0 |
0 |
0 |
| OW |
361 |
2389 |
417 |
548 |
2 |
0 |
0 |
0 |
| VODI |
2 |
243 |
195 |
2559 |
661 |
39 |
0 |
0 |
| ODI |
0 |
32 |
1 |
140 |
4587 |
527 |
0 |
0 |
| CDI |
0 |
14 |
3 |
4 |
735 |
7178 |
242 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
30 |
2789 |
457 |
0 |
|
Date: 2025-09-08:
| 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 |
32356 |
4758 |
37 |
11 |
0 |
0 |
0 |
0 |
| OW |
392 |
2553 |
403 |
330 |
3 |
2 |
0 |
0 |
| VODI |
38 |
395 |
223 |
2474 |
535 |
22 |
0 |
0 |
| ODI |
0 |
21 |
3 |
331 |
3934 |
575 |
0 |
0 |
| CDI |
0 |
6 |
0 |
24 |
1031 |
6522 |
271 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
10 |
3457 |
514 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
32342 |
4696 |
33 |
12 |
0 |
0 |
0 |
0 |
| OW |
424 |
2580 |
423 |
358 |
0 |
0 |
0 |
0 |
| VODI |
20 |
434 |
208 |
2400 |
650 |
24 |
0 |
0 |
| ODI |
0 |
18 |
2 |
380 |
3952 |
720 |
0 |
0 |
| CDI |
0 |
5 |
0 |
20 |
905 |
6499 |
272 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
6 |
3335 |
513 |
0 |
|
Date: 2025-09-10:
| 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 |
32588 |
4956 |
55 |
15 |
0 |
0 |
0 |
0 |
| OW |
494 |
2013 |
544 |
628 |
2 |
0 |
0 |
0 |
| VODI |
18 |
69 |
117 |
2488 |
606 |
3 |
0 |
0 |
| ODI |
0 |
5 |
1 |
269 |
2883 |
176 |
0 |
0 |
| CDI |
0 |
1 |
0 |
5 |
2302 |
5820 |
152 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
5 |
3884 |
1132 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
32286 |
3739 |
69 |
12 |
0 |
0 |
0 |
0 |
| OW |
794 |
2903 |
389 |
421 |
0 |
0 |
0 |
0 |
| VODI |
20 |
388 |
255 |
2367 |
628 |
8 |
0 |
0 |
| ODI |
0 |
6 |
3 |
570 |
3859 |
504 |
0 |
0 |
| CDI |
0 |
8 |
1 |
35 |
1297 |
4916 |
118 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
14 |
4455 |
1166 |
0 |
|
Date: 2025-09-12:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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