Validation of sea ice concentration
Bulletin date: 2024-04-18
Model vs. observations, sea ice class contingency tables
Date: 2024-04-12:
| 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 |
53087 |
19758 |
673 |
61 |
3 |
0 |
1 |
0 |
| OW |
0 |
897 |
1184 |
609 |
90 |
38 |
29 |
0 |
| VODI |
0 |
63 |
747 |
1455 |
572 |
338 |
217 |
0 |
| ODI |
0 |
22 |
208 |
786 |
736 |
772 |
1032 |
13 |
| CDI |
0 |
78 |
195 |
535 |
796 |
1754 |
4806 |
183 |
| VCDI |
0 |
0 |
13 |
154 |
216 |
1021 |
32928 |
32398 |
|
...date precedes bulletin
|
Date: 2024-04-16:
| 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 |
53363 |
18460 |
1448 |
215 |
8 |
2 |
2 |
0 |
| OW |
0 |
749 |
1773 |
740 |
144 |
51 |
8 |
0 |
| VODI |
0 |
53 |
749 |
1529 |
824 |
516 |
63 |
2 |
| ODI |
0 |
14 |
244 |
804 |
897 |
1624 |
559 |
2 |
| CDI |
0 |
3 |
241 |
657 |
733 |
1883 |
4592 |
21 |
| VCDI |
0 |
0 |
5 |
109 |
223 |
1386 |
31958 |
31814 |
|
...date precedes bulletin
|
Date: 2024-04-18:
| 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 |
53152 |
18636 |
1261 |
168 |
41 |
0 |
0 |
0 |
| OW |
0 |
619 |
1461 |
805 |
179 |
41 |
5 |
0 |
| VODI |
0 |
92 |
705 |
1325 |
979 |
481 |
37 |
0 |
| ODI |
0 |
46 |
307 |
696 |
1046 |
1584 |
375 |
0 |
| CDI |
0 |
19 |
299 |
507 |
1147 |
1993 |
5120 |
30 |
| VCDI |
0 |
0 |
131 |
156 |
296 |
1630 |
31287 |
31812 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
53152 |
18768 |
1394 |
235 |
44 |
0 |
1 |
0 |
| OW |
0 |
510 |
1319 |
808 |
227 |
59 |
6 |
0 |
| VODI |
0 |
87 |
723 |
1246 |
897 |
457 |
51 |
0 |
| ODI |
0 |
39 |
297 |
704 |
1097 |
1438 |
264 |
0 |
| CDI |
0 |
8 |
295 |
512 |
1162 |
2188 |
5372 |
28 |
| VCDI |
0 |
0 |
136 |
152 |
261 |
1587 |
31130 |
31814 |
|
Date: 2024-04-22:
| 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 |
55114 |
16969 |
1532 |
148 |
62 |
31 |
1 |
0 |
| OW |
0 |
1081 |
2065 |
457 |
186 |
153 |
5 |
0 |
| VODI |
0 |
166 |
739 |
1051 |
749 |
782 |
122 |
0 |
| ODI |
0 |
98 |
301 |
464 |
558 |
1787 |
870 |
7 |
| CDI |
0 |
213 |
770 |
434 |
555 |
2044 |
7109 |
124 |
| VCDI |
0 |
6 |
238 |
428 |
447 |
635 |
33158 |
26809 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
55114 |
16522 |
1194 |
137 |
77 |
83 |
1 |
0 |
| OW |
0 |
824 |
1265 |
318 |
159 |
153 |
3 |
0 |
| VODI |
0 |
407 |
1129 |
829 |
572 |
759 |
86 |
0 |
| ODI |
0 |
252 |
618 |
529 |
482 |
1515 |
440 |
1 |
| CDI |
0 |
283 |
595 |
614 |
735 |
1996 |
7448 |
157 |
| VCDI |
0 |
245 |
844 |
555 |
532 |
926 |
33287 |
26782 |
|
Date: 2024-04-24:
| 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 |
54613 |
18125 |
861 |
370 |
70 |
46 |
5 |
0 |
| OW |
0 |
1337 |
1403 |
745 |
137 |
90 |
68 |
0 |
| VODI |
0 |
285 |
842 |
1458 |
659 |
421 |
274 |
0 |
| ODI |
0 |
161 |
235 |
1053 |
893 |
1116 |
712 |
0 |
| CDI |
0 |
667 |
361 |
851 |
934 |
2562 |
6574 |
13 |
| VCDI |
0 |
66 |
356 |
652 |
450 |
1424 |
38315 |
19264 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
54613 |
16925 |
602 |
442 |
79 |
39 |
3 |
0 |
| OW |
0 |
1247 |
869 |
550 |
140 |
79 |
31 |
0 |
| VODI |
0 |
837 |
918 |
1400 |
616 |
328 |
219 |
0 |
| ODI |
0 |
425 |
511 |
861 |
672 |
885 |
649 |
6 |
| CDI |
0 |
728 |
625 |
1092 |
1121 |
2870 |
7645 |
21 |
| VCDI |
0 |
479 |
533 |
784 |
515 |
1458 |
37401 |
19250 |
|
Date: 2024-04-26:
| 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 |
54863 |
17636 |
1407 |
319 |
35 |
16 |
10 |
0 |
| OW |
0 |
1179 |
1375 |
998 |
89 |
53 |
106 |
0 |
| VODI |
0 |
368 |
938 |
1461 |
511 |
364 |
332 |
0 |
| ODI |
0 |
205 |
396 |
1216 |
892 |
758 |
966 |
4 |
| CDI |
0 |
537 |
607 |
1359 |
1356 |
1860 |
7438 |
51 |
| VCDI |
0 |
38 |
185 |
1155 |
1032 |
1419 |
35262 |
19672 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
54863 |
16414 |
1132 |
378 |
35 |
7 |
1 |
0 |
| OW |
0 |
1186 |
871 |
828 |
103 |
30 |
36 |
0 |
| VODI |
0 |
840 |
1272 |
1478 |
402 |
199 |
258 |
0 |
| ODI |
0 |
504 |
437 |
1104 |
904 |
656 |
1011 |
5 |
| CDI |
0 |
718 |
710 |
1488 |
1468 |
2224 |
7891 |
70 |
| VCDI |
0 |
301 |
486 |
1232 |
1003 |
1354 |
34917 |
19652 |
|
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