Validation of sea ice concentration
Bulletin date: 2025-01-16
Model vs. observations, sea ice class contingency tables
Date: 2025-01-10:
| 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 |
59821 |
24330 |
4175 |
824 |
272 |
157 |
3 |
0 |
| OW |
1 |
507 |
1522 |
891 |
320 |
475 |
101 |
0 |
| VODI |
0 |
95 |
813 |
829 |
560 |
612 |
444 |
0 |
| ODI |
0 |
0 |
275 |
441 |
513 |
527 |
943 |
22 |
| CDI |
0 |
0 |
164 |
394 |
568 |
830 |
5870 |
132 |
| VCDI |
0 |
0 |
43 |
160 |
157 |
606 |
23896 |
26526 |
|
...date precedes bulletin
|
Date: 2025-01-14:
| 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 |
60584 |
24064 |
3638 |
737 |
284 |
23 |
3 |
0 |
| OW |
0 |
377 |
2142 |
877 |
532 |
199 |
111 |
0 |
| VODI |
0 |
112 |
1013 |
704 |
615 |
655 |
338 |
1 |
| ODI |
0 |
59 |
314 |
337 |
440 |
670 |
555 |
23 |
| CDI |
0 |
14 |
409 |
421 |
748 |
1408 |
4152 |
247 |
| VCDI |
0 |
0 |
145 |
353 |
569 |
1293 |
27630 |
22048 |
|
...date precedes bulletin
|
Date: 2025-01-16:
| 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 |
60922 |
23638 |
3472 |
830 |
226 |
91 |
10 |
0 |
| OW |
0 |
396 |
1907 |
934 |
444 |
353 |
59 |
0 |
| VODI |
0 |
83 |
981 |
803 |
503 |
582 |
303 |
0 |
| ODI |
0 |
35 |
275 |
324 |
524 |
632 |
622 |
0 |
| CDI |
0 |
52 |
214 |
249 |
725 |
1548 |
3960 |
21 |
| VCDI |
0 |
17 |
111 |
247 |
339 |
1907 |
31197 |
19308 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
60922 |
23886 |
4121 |
1006 |
272 |
103 |
10 |
0 |
| OW |
0 |
208 |
1657 |
955 |
520 |
396 |
86 |
0 |
| VODI |
0 |
49 |
758 |
764 |
578 |
649 |
350 |
0 |
| ODI |
0 |
31 |
200 |
268 |
550 |
754 |
807 |
6 |
| CDI |
0 |
36 |
138 |
164 |
550 |
1590 |
4581 |
51 |
| VCDI |
0 |
11 |
86 |
230 |
291 |
1621 |
30317 |
19272 |
|
Date: 2025-01-20:
| 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 |
61294 |
23825 |
2976 |
347 |
105 |
38 |
2 |
0 |
| OW |
0 |
811 |
1626 |
534 |
269 |
117 |
48 |
0 |
| VODI |
0 |
179 |
896 |
724 |
565 |
368 |
258 |
1 |
| ODI |
0 |
20 |
272 |
669 |
483 |
542 |
651 |
26 |
| CDI |
0 |
0 |
77 |
421 |
590 |
836 |
3715 |
211 |
| VCDI |
0 |
0 |
46 |
123 |
210 |
436 |
21917 |
32604 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61294 |
23605 |
3017 |
436 |
119 |
39 |
4 |
0 |
| OW |
0 |
742 |
1383 |
498 |
298 |
190 |
107 |
0 |
| VODI |
0 |
313 |
779 |
715 |
422 |
239 |
360 |
0 |
| ODI |
0 |
97 |
400 |
635 |
477 |
337 |
561 |
36 |
| CDI |
0 |
61 |
242 |
403 |
609 |
970 |
3944 |
401 |
| VCDI |
0 |
17 |
72 |
131 |
297 |
562 |
21615 |
32405 |
|
Date: 2025-01-22:
| 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 |
60346 |
23996 |
2813 |
620 |
132 |
22 |
0 |
0 |
| OW |
0 |
468 |
1415 |
596 |
359 |
116 |
9 |
0 |
| VODI |
0 |
186 |
685 |
619 |
599 |
447 |
101 |
2 |
| ODI |
0 |
49 |
346 |
520 |
466 |
793 |
731 |
30 |
| CDI |
0 |
1 |
122 |
377 |
653 |
1125 |
5581 |
253 |
| VCDI |
0 |
0 |
52 |
90 |
247 |
851 |
20566 |
32460 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
60346 |
23266 |
2389 |
490 |
137 |
8 |
1 |
0 |
| OW |
0 |
690 |
1420 |
604 |
286 |
110 |
21 |
0 |
| VODI |
0 |
395 |
790 |
514 |
532 |
392 |
116 |
3 |
| ODI |
0 |
276 |
404 |
453 |
421 |
652 |
757 |
40 |
| CDI |
0 |
73 |
368 |
604 |
734 |
1167 |
5534 |
313 |
| VCDI |
0 |
0 |
62 |
157 |
346 |
1025 |
20559 |
32389 |
|
Date: 2025-01-24:
| 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 |
59758 |
24262 |
2625 |
462 |
121 |
24 |
1 |
0 |
| OW |
0 |
362 |
1636 |
665 |
263 |
83 |
12 |
0 |
| VODI |
0 |
113 |
826 |
866 |
728 |
495 |
164 |
0 |
| ODI |
0 |
18 |
283 |
387 |
514 |
1041 |
860 |
1 |
| CDI |
0 |
0 |
188 |
256 |
407 |
1211 |
6132 |
222 |
| VCDI |
0 |
0 |
12 |
39 |
154 |
644 |
25382 |
27627 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59758 |
23146 |
1866 |
366 |
97 |
27 |
0 |
0 |
| OW |
0 |
936 |
1312 |
407 |
134 |
45 |
5 |
0 |
| VODI |
0 |
446 |
1374 |
776 |
483 |
295 |
126 |
0 |
| ODI |
0 |
175 |
506 |
540 |
567 |
733 |
634 |
9 |
| CDI |
0 |
52 |
442 |
459 |
573 |
1418 |
5108 |
190 |
| VCDI |
0 |
0 |
70 |
127 |
333 |
980 |
26678 |
27651 |
|
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