Validation of sea ice concentration
Bulletin date: 2023-12-21
Model vs. observations, sea ice class contingency tables
Date: 2023-12-15:
| 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 |
63507 |
22775 |
1748 |
227 |
28 |
8 |
2 |
0 |
| OW |
0 |
1152 |
1915 |
803 |
149 |
75 |
14 |
0 |
| VODI |
0 |
556 |
1463 |
1753 |
695 |
401 |
129 |
0 |
| ODI |
0 |
234 |
384 |
927 |
1049 |
851 |
382 |
0 |
| CDI |
0 |
138 |
473 |
786 |
1070 |
1732 |
4648 |
0 |
| VCDI |
0 |
87 |
163 |
575 |
571 |
1728 |
33545 |
11725 |
|
...date precedes bulletin
|
Date: 2023-12-19:
| 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 |
63980 |
23375 |
1132 |
315 |
21 |
1 |
0 |
0 |
| OW |
0 |
1861 |
1609 |
879 |
78 |
25 |
4 |
0 |
| VODI |
0 |
385 |
1377 |
1998 |
653 |
285 |
88 |
0 |
| ODI |
0 |
92 |
273 |
1010 |
972 |
1053 |
677 |
2 |
| CDI |
0 |
126 |
204 |
961 |
1282 |
1847 |
4386 |
49 |
| VCDI |
0 |
17 |
162 |
490 |
586 |
2253 |
29450 |
14510 |
|
...date precedes bulletin
|
Date: 2023-12-21:
| 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 |
60310 |
24765 |
2289 |
589 |
144 |
36 |
0 |
0 |
| OW |
0 |
756 |
1638 |
743 |
320 |
293 |
0 |
0 |
| VODI |
0 |
131 |
594 |
1325 |
781 |
1118 |
93 |
0 |
| ODI |
0 |
36 |
187 |
824 |
755 |
2289 |
796 |
4 |
| CDI |
0 |
4 |
142 |
360 |
855 |
3396 |
4147 |
60 |
| VCDI |
0 |
0 |
35 |
282 |
406 |
2450 |
27093 |
18422 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
60310 |
24771 |
2307 |
600 |
148 |
59 |
0 |
0 |
| OW |
0 |
755 |
1630 |
706 |
302 |
272 |
0 |
0 |
| VODI |
0 |
125 |
585 |
1332 |
782 |
932 |
98 |
0 |
| ODI |
0 |
36 |
190 |
817 |
762 |
2245 |
738 |
2 |
| CDI |
0 |
5 |
139 |
371 |
860 |
3617 |
4241 |
59 |
| VCDI |
0 |
0 |
34 |
297 |
407 |
2457 |
27052 |
18425 |
|
Date: 2023-12-25:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2023-12-27:
| 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 |
61082 |
23230 |
1637 |
205 |
28 |
3 |
2 |
0 |
| OW |
0 |
1352 |
1730 |
414 |
178 |
31 |
3 |
0 |
| VODI |
0 |
307 |
1327 |
927 |
480 |
298 |
81 |
0 |
| ODI |
0 |
21 |
285 |
660 |
624 |
828 |
1231 |
2 |
| CDI |
0 |
5 |
182 |
512 |
718 |
1753 |
3064 |
34 |
| VCDI |
0 |
0 |
121 |
192 |
409 |
2682 |
32331 |
19499 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61082 |
22140 |
1415 |
225 |
29 |
2 |
2 |
0 |
| OW |
0 |
1725 |
1134 |
315 |
146 |
20 |
5 |
0 |
| VODI |
0 |
811 |
1353 |
544 |
418 |
297 |
143 |
0 |
| ODI |
0 |
178 |
697 |
681 |
408 |
603 |
991 |
11 |
| CDI |
0 |
52 |
456 |
755 |
676 |
1304 |
3132 |
73 |
| VCDI |
0 |
9 |
227 |
390 |
760 |
3369 |
32439 |
19451 |
|
Date: 2023-12-29:
| 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 |
60553 |
23704 |
1114 |
300 |
24 |
4 |
2 |
0 |
| OW |
0 |
1845 |
1298 |
571 |
145 |
35 |
11 |
0 |
| VODI |
0 |
467 |
1130 |
1118 |
367 |
132 |
87 |
0 |
| ODI |
0 |
66 |
424 |
701 |
655 |
847 |
791 |
0 |
| CDI |
0 |
15 |
329 |
559 |
669 |
1339 |
3038 |
34 |
| VCDI |
0 |
3 |
337 |
550 |
678 |
3208 |
36421 |
14897 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
60553 |
22255 |
984 |
275 |
84 |
19 |
11 |
0 |
| OW |
0 |
1937 |
796 |
428 |
92 |
18 |
7 |
0 |
| VODI |
0 |
1054 |
902 |
841 |
290 |
146 |
44 |
0 |
| ODI |
0 |
532 |
477 |
558 |
324 |
343 |
340 |
2 |
| CDI |
0 |
308 |
664 |
660 |
651 |
1028 |
2680 |
83 |
| VCDI |
0 |
14 |
809 |
1037 |
1097 |
4011 |
37268 |
14846 |
|
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