Validation of sea ice concentration
Bulletin date: 2024-10-24
Model vs. observations, sea ice class contingency tables
Date: 2024-10-18:
| 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 |
29678 |
19948 |
1979 |
208 |
115 |
2 |
2 |
0 |
| OW |
0 |
513 |
717 |
244 |
75 |
9 |
0 |
0 |
| VODI |
0 |
119 |
370 |
383 |
128 |
63 |
50 |
0 |
| ODI |
0 |
40 |
156 |
326 |
140 |
154 |
154 |
0 |
| CDI |
0 |
20 |
364 |
551 |
474 |
347 |
1057 |
0 |
| VCDI |
0 |
0 |
60 |
212 |
421 |
939 |
13333 |
7266 |
|
...date precedes bulletin
|
Date: 2024-10-22:
| 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 |
99773 |
24540 |
2029 |
624 |
20 |
6 |
2 |
0 |
| OW |
0 |
817 |
916 |
801 |
140 |
22 |
6 |
0 |
| VODI |
0 |
143 |
626 |
889 |
372 |
133 |
34 |
0 |
| ODI |
0 |
38 |
148 |
588 |
402 |
191 |
98 |
0 |
| CDI |
0 |
8 |
119 |
426 |
486 |
611 |
3379 |
160 |
| VCDI |
0 |
0 |
0 |
290 |
470 |
1618 |
11192 |
6351 |
|
...date precedes bulletin
|
Date: 2024-10-24:
| 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 |
89760 |
23667 |
3165 |
802 |
327 |
13 |
2 |
0 |
| OW |
0 |
189 |
747 |
929 |
419 |
169 |
0 |
0 |
| VODI |
0 |
23 |
157 |
778 |
465 |
436 |
1 |
0 |
| ODI |
0 |
3 |
168 |
746 |
281 |
337 |
35 |
0 |
| CDI |
0 |
0 |
201 |
885 |
365 |
730 |
914 |
2 |
| VCDI |
0 |
0 |
7 |
580 |
361 |
1376 |
11150 |
10143 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89760 |
23565 |
3127 |
884 |
325 |
10 |
2 |
0 |
| OW |
0 |
293 |
766 |
836 |
446 |
220 |
0 |
0 |
| VODI |
0 |
22 |
238 |
857 |
440 |
393 |
6 |
0 |
| ODI |
0 |
2 |
113 |
620 |
276 |
323 |
30 |
0 |
| CDI |
0 |
0 |
178 |
874 |
372 |
781 |
1089 |
2 |
| VCDI |
0 |
0 |
23 |
649 |
359 |
1334 |
10975 |
10143 |
|
Date: 2024-10-28:
| 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 |
96882 |
23056 |
3640 |
691 |
62 |
14 |
2 |
0 |
| OW |
0 |
182 |
1225 |
721 |
227 |
150 |
24 |
0 |
| VODI |
0 |
14 |
360 |
819 |
530 |
535 |
159 |
0 |
| ODI |
0 |
1 |
166 |
348 |
514 |
760 |
529 |
0 |
| CDI |
0 |
0 |
207 |
243 |
329 |
895 |
2864 |
171 |
| VCDI |
0 |
0 |
145 |
361 |
429 |
1084 |
12337 |
7792 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
96882 |
22851 |
3655 |
878 |
202 |
326 |
7 |
0 |
| OW |
0 |
290 |
944 |
531 |
278 |
338 |
68 |
0 |
| VODI |
0 |
77 |
471 |
598 |
327 |
382 |
173 |
0 |
| ODI |
0 |
26 |
286 |
354 |
420 |
337 |
243 |
0 |
| CDI |
0 |
9 |
281 |
458 |
460 |
859 |
1773 |
0 |
| VCDI |
0 |
0 |
106 |
364 |
404 |
1196 |
13651 |
7963 |
|
Date: 2024-10-30:
| 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 |
95855 |
24124 |
3255 |
665 |
23 |
22 |
1 |
0 |
| OW |
0 |
264 |
926 |
886 |
136 |
80 |
3 |
0 |
| VODI |
0 |
9 |
222 |
887 |
477 |
557 |
154 |
0 |
| ODI |
0 |
0 |
40 |
468 |
432 |
904 |
470 |
0 |
| CDI |
0 |
0 |
5 |
306 |
581 |
1290 |
3666 |
232 |
| VCDI |
0 |
0 |
0 |
100 |
510 |
1552 |
12256 |
7110 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
95855 |
23730 |
3142 |
911 |
206 |
471 |
20 |
0 |
| OW |
0 |
531 |
684 |
603 |
170 |
280 |
46 |
0 |
| VODI |
0 |
136 |
395 |
593 |
234 |
596 |
210 |
0 |
| ODI |
0 |
0 |
205 |
592 |
331 |
584 |
366 |
0 |
| CDI |
0 |
0 |
22 |
560 |
753 |
801 |
2225 |
0 |
| VCDI |
0 |
0 |
0 |
53 |
465 |
1673 |
13683 |
7342 |
|
Date: 2024-11-01:
| 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 |
93464 |
25345 |
2894 |
892 |
350 |
68 |
1 |
0 |
| OW |
0 |
231 |
867 |
758 |
386 |
219 |
1 |
0 |
| VODI |
0 |
13 |
270 |
771 |
524 |
640 |
129 |
0 |
| ODI |
0 |
0 |
64 |
493 |
480 |
1179 |
389 |
0 |
| CDI |
0 |
0 |
6 |
398 |
483 |
1818 |
3078 |
0 |
| VCDI |
0 |
0 |
0 |
177 |
267 |
1440 |
12574 |
7799 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
93464 |
24691 |
3031 |
1179 |
714 |
482 |
61 |
0 |
| OW |
0 |
808 |
556 |
436 |
201 |
392 |
102 |
0 |
| VODI |
0 |
89 |
413 |
668 |
374 |
690 |
296 |
0 |
| ODI |
0 |
1 |
91 |
573 |
432 |
678 |
379 |
0 |
| CDI |
0 |
0 |
10 |
575 |
621 |
1561 |
1945 |
0 |
| VCDI |
0 |
0 |
0 |
58 |
148 |
1561 |
13389 |
7799 |
|
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