Validation of sea ice concentration
Bulletin date: 2025-04-17
Model vs. observations, sea ice class contingency tables
Date: 2025-04-11:
| 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 |
55104 |
23416 |
3650 |
1303 |
523 |
81 |
2 |
0 |
| OW |
0 |
320 |
1186 |
917 |
1082 |
493 |
52 |
0 |
| VODI |
0 |
26 |
637 |
730 |
867 |
946 |
468 |
36 |
| ODI |
0 |
4 |
128 |
362 |
541 |
716 |
1410 |
123 |
| CDI |
0 |
0 |
61 |
240 |
376 |
979 |
6378 |
411 |
| VCDI |
0 |
0 |
13 |
144 |
307 |
734 |
28138 |
25940 |
|
...date precedes bulletin
|
Date: 2025-04-15:
| 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 |
56770 |
22970 |
4457 |
765 |
152 |
26 |
0 |
0 |
| OW |
0 |
307 |
1491 |
1001 |
592 |
249 |
35 |
0 |
| VODI |
0 |
61 |
490 |
887 |
1002 |
699 |
296 |
3 |
| ODI |
0 |
1 |
164 |
379 |
622 |
983 |
1018 |
50 |
| CDI |
0 |
0 |
101 |
388 |
584 |
1398 |
6090 |
281 |
| VCDI |
0 |
0 |
10 |
88 |
186 |
637 |
29997 |
23614 |
|
...date precedes bulletin
|
Date: 2025-04-17:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-04-21:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-04-23:
| 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 |
53342 |
21295 |
4553 |
2743 |
891 |
102 |
44 |
0 |
| OW |
0 |
113 |
582 |
993 |
1190 |
407 |
141 |
2 |
| VODI |
0 |
0 |
154 |
573 |
907 |
1009 |
962 |
15 |
| ODI |
0 |
0 |
16 |
178 |
410 |
958 |
2050 |
105 |
| CDI |
0 |
0 |
17 |
49 |
303 |
2649 |
9112 |
811 |
| VCDI |
0 |
0 |
0 |
9 |
118 |
1391 |
25437 |
25213 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
53342 |
21159 |
4393 |
2416 |
984 |
74 |
65 |
0 |
| OW |
0 |
225 |
604 |
1096 |
958 |
649 |
184 |
1 |
| VODI |
0 |
24 |
261 |
620 |
802 |
812 |
879 |
33 |
| ODI |
0 |
0 |
32 |
297 |
566 |
924 |
2011 |
158 |
| CDI |
0 |
0 |
32 |
107 |
316 |
2433 |
11275 |
825 |
| VCDI |
0 |
0 |
0 |
9 |
193 |
1624 |
23332 |
25129 |
|
Date: 2025-04-25:
| 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 |
54261 |
22041 |
4770 |
926 |
314 |
101 |
0 |
0 |
| OW |
0 |
192 |
1588 |
875 |
640 |
509 |
99 |
0 |
| VODI |
0 |
8 |
700 |
776 |
606 |
995 |
762 |
20 |
| ODI |
0 |
0 |
136 |
357 |
344 |
967 |
2249 |
107 |
| CDI |
0 |
0 |
26 |
198 |
254 |
1156 |
11266 |
793 |
| VCDI |
0 |
0 |
2 |
19 |
86 |
760 |
23057 |
26884 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
54261 |
21854 |
4274 |
1083 |
462 |
263 |
29 |
0 |
| OW |
0 |
345 |
1446 |
533 |
463 |
550 |
283 |
0 |
| VODI |
0 |
42 |
968 |
663 |
481 |
616 |
917 |
0 |
| ODI |
0 |
0 |
393 |
417 |
315 |
973 |
1998 |
78 |
| CDI |
0 |
0 |
136 |
351 |
321 |
1264 |
11473 |
534 |
| VCDI |
0 |
0 |
5 |
104 |
202 |
822 |
22733 |
27192 |
|
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