Validation of sea ice concentration
Bulletin date: 2025-01-30
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2025-01-28:
| 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 |
61583 |
24282 |
2571 |
430 |
95 |
29 |
7 |
0 |
| OW |
0 |
578 |
2348 |
953 |
291 |
111 |
41 |
0 |
| VODI |
0 |
50 |
975 |
1074 |
767 |
423 |
273 |
0 |
| ODI |
0 |
1 |
253 |
491 |
577 |
703 |
616 |
1 |
| CDI |
0 |
0 |
127 |
368 |
535 |
1734 |
2502 |
97 |
| VCDI |
0 |
0 |
45 |
418 |
353 |
1283 |
26638 |
25221 |
|
...date precedes bulletin
|
Date: 2025-01-30:
| 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 |
61941 |
24482 |
2658 |
527 |
101 |
25 |
1 |
0 |
| OW |
0 |
784 |
1752 |
901 |
297 |
86 |
35 |
0 |
| VODI |
0 |
447 |
936 |
1065 |
715 |
375 |
123 |
0 |
| ODI |
0 |
86 |
287 |
518 |
731 |
531 |
477 |
7 |
| CDI |
0 |
36 |
175 |
396 |
773 |
1303 |
2686 |
120 |
| VCDI |
0 |
17 |
125 |
198 |
415 |
1142 |
27805 |
23765 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61941 |
24470 |
2662 |
552 |
99 |
25 |
0 |
0 |
| OW |
0 |
707 |
1717 |
812 |
283 |
80 |
31 |
0 |
| VODI |
0 |
515 |
956 |
1135 |
736 |
361 |
131 |
0 |
| ODI |
0 |
101 |
288 |
547 |
729 |
562 |
527 |
13 |
| CDI |
0 |
35 |
177 |
373 |
769 |
1304 |
2688 |
125 |
| VCDI |
0 |
24 |
133 |
186 |
416 |
1130 |
27750 |
23754 |
|
Date: 2025-02-03:
| 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 |
65088 |
22528 |
2366 |
200 |
83 |
9 |
1 |
0 |
| OW |
0 |
2300 |
2499 |
979 |
298 |
80 |
42 |
0 |
| VODI |
0 |
369 |
1115 |
823 |
545 |
411 |
182 |
0 |
| ODI |
0 |
46 |
535 |
550 |
474 |
791 |
601 |
4 |
| CDI |
0 |
31 |
557 |
627 |
817 |
1250 |
4889 |
194 |
| VCDI |
0 |
0 |
150 |
450 |
435 |
1571 |
25452 |
19502 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
65088 |
21982 |
1721 |
137 |
51 |
7 |
0 |
0 |
| OW |
0 |
1514 |
1692 |
429 |
194 |
62 |
17 |
0 |
| VODI |
0 |
1100 |
1453 |
764 |
528 |
417 |
163 |
0 |
| ODI |
0 |
402 |
740 |
716 |
422 |
763 |
696 |
4 |
| CDI |
0 |
227 |
1043 |
773 |
616 |
969 |
3594 |
236 |
| VCDI |
0 |
49 |
573 |
810 |
841 |
1894 |
26697 |
19460 |
|
Date: 2025-02-05:
| 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 |
64634 |
24444 |
1933 |
248 |
50 |
3 |
0 |
0 |
| OW |
0 |
2195 |
1806 |
628 |
108 |
40 |
20 |
0 |
| VODI |
0 |
539 |
1469 |
1051 |
549 |
333 |
199 |
0 |
| ODI |
0 |
166 |
759 |
549 |
416 |
689 |
789 |
3 |
| CDI |
0 |
129 |
834 |
905 |
727 |
1449 |
3782 |
139 |
| VCDI |
0 |
22 |
712 |
1058 |
894 |
1661 |
24601 |
18311 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64634 |
22934 |
1512 |
142 |
21 |
3 |
0 |
0 |
| OW |
0 |
1998 |
1053 |
394 |
97 |
15 |
25 |
0 |
| VODI |
0 |
1479 |
1458 |
898 |
484 |
376 |
202 |
0 |
| ODI |
0 |
596 |
1015 |
702 |
430 |
918 |
831 |
1 |
| CDI |
0 |
348 |
1265 |
963 |
601 |
1108 |
3901 |
56 |
| VCDI |
0 |
140 |
1210 |
1340 |
1111 |
1755 |
24432 |
18396 |
|
Date: 2025-02-07:
| 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 |
63945 |
23911 |
2724 |
612 |
115 |
53 |
0 |
0 |
| OW |
0 |
1590 |
1760 |
892 |
305 |
157 |
139 |
0 |
| VODI |
0 |
490 |
1621 |
1272 |
665 |
428 |
512 |
0 |
| ODI |
0 |
105 |
699 |
649 |
577 |
631 |
970 |
8 |
| CDI |
0 |
86 |
669 |
945 |
1003 |
1425 |
3357 |
61 |
| VCDI |
0 |
32 |
586 |
1633 |
984 |
2185 |
25905 |
15143 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
63945 |
22563 |
2365 |
540 |
158 |
34 |
5 |
0 |
| OW |
0 |
1783 |
1053 |
664 |
161 |
119 |
81 |
0 |
| VODI |
0 |
1007 |
1530 |
1151 |
480 |
414 |
524 |
0 |
| ODI |
0 |
377 |
1064 |
757 |
824 |
747 |
1182 |
3 |
| CDI |
0 |
355 |
1125 |
1026 |
1000 |
1616 |
3903 |
18 |
| VCDI |
0 |
129 |
922 |
1865 |
1026 |
1949 |
25188 |
15191 |
|
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