Validation of sea ice concentration
Bulletin date: 2024-12-05
Model vs. observations, sea ice class contingency tables
Date: 2024-11-29:
| 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 |
73306 |
27044 |
2222 |
579 |
62 |
3 |
2 |
0 |
| OW |
0 |
895 |
1229 |
1051 |
393 |
41 |
3 |
0 |
| VODI |
0 |
133 |
557 |
1163 |
741 |
243 |
31 |
0 |
| ODI |
0 |
27 |
211 |
645 |
793 |
863 |
327 |
0 |
| CDI |
0 |
1 |
137 |
289 |
1276 |
2204 |
2533 |
16 |
| VCDI |
0 |
0 |
104 |
228 |
281 |
1173 |
20319 |
17343 |
|
...date precedes bulletin
|
Date: 2024-12-03:
| 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 |
72002 |
26507 |
2549 |
193 |
89 |
16 |
2 |
0 |
| OW |
0 |
1363 |
1720 |
831 |
234 |
66 |
0 |
0 |
| VODI |
0 |
226 |
877 |
1195 |
699 |
478 |
74 |
0 |
| ODI |
0 |
34 |
112 |
382 |
773 |
1279 |
498 |
0 |
| CDI |
0 |
10 |
90 |
176 |
766 |
4387 |
4696 |
26 |
| VCDI |
0 |
0 |
7 |
118 |
216 |
1297 |
17724 |
16756 |
|
...date precedes bulletin
|
Date: 2024-12-05:
| 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 |
72407 |
23846 |
3154 |
395 |
77 |
9 |
9 |
0 |
| OW |
0 |
1315 |
1427 |
907 |
389 |
115 |
39 |
0 |
| VODI |
0 |
233 |
776 |
926 |
1220 |
509 |
107 |
0 |
| ODI |
0 |
11 |
178 |
274 |
990 |
1388 |
676 |
0 |
| CDI |
0 |
0 |
70 |
64 |
510 |
2549 |
4270 |
41 |
| VCDI |
0 |
0 |
28 |
48 |
111 |
1574 |
18271 |
19555 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
72407 |
24139 |
3477 |
579 |
133 |
29 |
9 |
0 |
| OW |
0 |
1004 |
1219 |
915 |
485 |
145 |
68 |
0 |
| VODI |
0 |
256 |
706 |
807 |
1219 |
613 |
107 |
0 |
| ODI |
0 |
5 |
145 |
219 |
943 |
1591 |
842 |
0 |
| CDI |
0 |
1 |
71 |
45 |
433 |
2365 |
4428 |
23 |
| VCDI |
0 |
0 |
15 |
49 |
84 |
1401 |
17918 |
19573 |
|
Date: 2024-12-09:
| 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 |
71910 |
24667 |
2934 |
228 |
22 |
6 |
3 |
0 |
| OW |
1 |
1209 |
2273 |
663 |
209 |
51 |
4 |
0 |
| VODI |
0 |
70 |
772 |
1024 |
770 |
370 |
60 |
0 |
| ODI |
0 |
9 |
149 |
672 |
626 |
1003 |
405 |
0 |
| CDI |
0 |
5 |
35 |
190 |
426 |
3124 |
3097 |
11 |
| VCDI |
0 |
0 |
22 |
76 |
106 |
968 |
21718 |
18580 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
71911 |
24227 |
2754 |
349 |
106 |
33 |
4 |
0 |
| OW |
0 |
1266 |
1461 |
387 |
246 |
113 |
76 |
0 |
| VODI |
0 |
356 |
1463 |
882 |
471 |
297 |
208 |
0 |
| ODI |
0 |
106 |
434 |
721 |
586 |
1037 |
666 |
0 |
| CDI |
0 |
5 |
56 |
436 |
627 |
2813 |
2941 |
5 |
| VCDI |
0 |
0 |
17 |
78 |
123 |
1229 |
21392 |
18586 |
|
Date: 2024-12-11:
| 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 |
71473 |
25437 |
1784 |
240 |
18 |
6 |
2 |
0 |
| OW |
0 |
2065 |
1156 |
646 |
178 |
41 |
13 |
0 |
| VODI |
0 |
680 |
520 |
828 |
757 |
374 |
115 |
0 |
| ODI |
0 |
160 |
179 |
377 |
496 |
693 |
725 |
0 |
| CDI |
0 |
12 |
77 |
231 |
390 |
1029 |
3027 |
13 |
| VCDI |
0 |
2 |
0 |
38 |
128 |
901 |
24071 |
19586 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
71473 |
24133 |
2180 |
493 |
158 |
50 |
26 |
0 |
| OW |
0 |
2113 |
613 |
454 |
286 |
113 |
121 |
0 |
| VODI |
0 |
1395 |
330 |
515 |
503 |
433 |
320 |
0 |
| ODI |
0 |
524 |
398 |
322 |
396 |
586 |
913 |
0 |
| CDI |
0 |
186 |
189 |
530 |
533 |
1025 |
2690 |
6 |
| VCDI |
0 |
5 |
6 |
46 |
91 |
837 |
23883 |
19593 |
|
Date: 2024-12-13:
| 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 |
68627 |
25640 |
2570 |
371 |
56 |
8 |
5 |
0 |
| OW |
0 |
1099 |
1501 |
924 |
369 |
101 |
34 |
0 |
| VODI |
0 |
142 |
723 |
688 |
694 |
525 |
353 |
0 |
| ODI |
0 |
44 |
193 |
397 |
482 |
650 |
824 |
5 |
| CDI |
0 |
29 |
136 |
233 |
411 |
1044 |
3596 |
66 |
| VCDI |
0 |
0 |
29 |
99 |
235 |
869 |
22935 |
21761 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
68627 |
24150 |
2693 |
733 |
360 |
88 |
55 |
0 |
| OW |
0 |
1571 |
807 |
456 |
303 |
272 |
220 |
0 |
| VODI |
0 |
909 |
711 |
489 |
419 |
415 |
629 |
0 |
| ODI |
0 |
232 |
468 |
429 |
393 |
492 |
899 |
0 |
| CDI |
0 |
90 |
418 |
503 |
510 |
1160 |
3682 |
97 |
| VCDI |
0 |
2 |
55 |
102 |
262 |
770 |
22262 |
21735 |
|
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