Validation of sea ice concentration
Bulletin date: 2023-11-30
Model vs. observations, sea ice class contingency tables
Date: 2023-11-24:
| 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 |
68594 |
20212 |
4295 |
346 |
215 |
122 |
0 |
0 |
| OW |
0 |
932 |
1634 |
496 |
159 |
256 |
34 |
0 |
| VODI |
0 |
284 |
1282 |
1006 |
561 |
274 |
280 |
0 |
| ODI |
0 |
13 |
702 |
797 |
724 |
342 |
304 |
0 |
| CDI |
0 |
0 |
590 |
620 |
1243 |
2327 |
1789 |
21 |
| VCDI |
0 |
0 |
436 |
403 |
623 |
1936 |
24685 |
19931 |
|
...date precedes bulletin
|
Date: 2023-11-28:
| 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 |
65979 |
24096 |
2128 |
725 |
262 |
22 |
0 |
0 |
| OW |
0 |
1964 |
1510 |
987 |
248 |
139 |
99 |
0 |
| VODI |
0 |
450 |
970 |
1375 |
597 |
211 |
174 |
0 |
| ODI |
0 |
208 |
258 |
941 |
903 |
856 |
721 |
0 |
| CDI |
0 |
208 |
187 |
717 |
1168 |
2005 |
4502 |
4 |
| VCDI |
0 |
205 |
258 |
325 |
350 |
2029 |
24338 |
16349 |
|
...date precedes bulletin
|
Date: 2023-11-30:
| 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 |
66710 |
21622 |
2871 |
583 |
251 |
117 |
0 |
0 |
| OW |
0 |
1856 |
1826 |
559 |
214 |
475 |
43 |
0 |
| VODI |
0 |
521 |
1025 |
990 |
620 |
775 |
126 |
0 |
| ODI |
0 |
86 |
351 |
479 |
665 |
1399 |
655 |
3 |
| CDI |
0 |
54 |
431 |
302 |
921 |
2167 |
4741 |
39 |
| VCDI |
0 |
14 |
213 |
163 |
231 |
1758 |
25381 |
17231 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
66710 |
21844 |
2977 |
580 |
292 |
249 |
0 |
0 |
| OW |
0 |
1581 |
1739 |
608 |
215 |
373 |
47 |
0 |
| VODI |
0 |
582 |
1018 |
988 |
626 |
813 |
136 |
0 |
| ODI |
0 |
82 |
387 |
437 |
607 |
1335 |
612 |
5 |
| CDI |
0 |
47 |
387 |
303 |
920 |
2159 |
4749 |
44 |
| VCDI |
0 |
17 |
209 |
160 |
242 |
1762 |
25402 |
17224 |
|
Date: 2023-12-04:
| 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 |
63402 |
23762 |
3438 |
329 |
313 |
87 |
0 |
0 |
| OW |
0 |
379 |
2239 |
597 |
389 |
124 |
2 |
0 |
| VODI |
0 |
18 |
941 |
889 |
929 |
830 |
334 |
0 |
| ODI |
0 |
0 |
191 |
343 |
594 |
1423 |
1098 |
0 |
| CDI |
0 |
0 |
129 |
129 |
349 |
1295 |
5703 |
48 |
| VCDI |
0 |
0 |
1 |
18 |
168 |
699 |
29886 |
17392 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
63402 |
23442 |
3283 |
375 |
353 |
115 |
3 |
0 |
| OW |
0 |
626 |
1830 |
616 |
509 |
340 |
66 |
0 |
| VODI |
0 |
91 |
1083 |
590 |
636 |
836 |
379 |
0 |
| ODI |
0 |
0 |
362 |
354 |
518 |
1021 |
910 |
0 |
| CDI |
0 |
0 |
321 |
285 |
450 |
1057 |
4279 |
54 |
| VCDI |
0 |
0 |
60 |
85 |
276 |
1089 |
31386 |
17386 |
|
Date: 2023-12-06:
| 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 |
65037 |
23090 |
2762 |
263 |
106 |
56 |
1 |
0 |
| OW |
0 |
765 |
1401 |
783 |
224 |
130 |
48 |
0 |
| VODI |
0 |
162 |
767 |
1034 |
659 |
474 |
248 |
0 |
| ODI |
0 |
68 |
190 |
510 |
537 |
1185 |
649 |
2 |
| CDI |
0 |
71 |
149 |
244 |
383 |
1534 |
3608 |
100 |
| VCDI |
0 |
86 |
59 |
97 |
139 |
1348 |
30822 |
18677 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
65037 |
22608 |
2317 |
315 |
110 |
107 |
18 |
0 |
| OW |
0 |
978 |
1508 |
642 |
284 |
186 |
55 |
0 |
| VODI |
0 |
336 |
880 |
911 |
496 |
606 |
377 |
0 |
| ODI |
0 |
93 |
352 |
485 |
488 |
1199 |
693 |
0 |
| CDI |
0 |
97 |
204 |
423 |
373 |
966 |
3002 |
87 |
| VCDI |
0 |
130 |
67 |
155 |
297 |
1663 |
31231 |
18692 |
|
Date: 2023-12-08:
| 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 |
65312 |
22734 |
2000 |
446 |
81 |
61 |
8 |
0 |
| OW |
0 |
802 |
1170 |
924 |
233 |
101 |
20 |
0 |
| VODI |
0 |
189 |
768 |
1029 |
712 |
363 |
143 |
0 |
| ODI |
0 |
57 |
237 |
583 |
646 |
901 |
453 |
0 |
| CDI |
0 |
63 |
202 |
440 |
537 |
1510 |
3463 |
47 |
| VCDI |
0 |
70 |
68 |
202 |
312 |
2173 |
33207 |
16201 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
65312 |
21577 |
2046 |
511 |
68 |
52 |
7 |
0 |
| OW |
0 |
1359 |
924 |
737 |
372 |
175 |
43 |
0 |
| VODI |
0 |
629 |
788 |
830 |
652 |
532 |
290 |
0 |
| ODI |
0 |
156 |
405 |
711 |
576 |
1140 |
679 |
0 |
| CDI |
0 |
122 |
228 |
604 |
501 |
1024 |
3155 |
70 |
| VCDI |
0 |
72 |
54 |
231 |
352 |
2186 |
33120 |
16178 |
|
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