Validation of sea ice concentration - Full domain
Bulletin date: 2025-11-13
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-11-07:
| 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 |
94301 |
12594 |
471 |
615 |
92 |
4 |
0 |
0 |
| OW |
1294 |
1259 |
327 |
978 |
532 |
109 |
0 |
0 |
| VODI |
3026 |
221 |
163 |
517 |
781 |
230 |
3 |
0 |
| ODI |
0 |
20 |
60 |
279 |
511 |
422 |
31 |
0 |
| CDI |
0 |
3 |
11 |
134 |
549 |
1177 |
316 |
0 |
| VCDI |
0 |
1 |
2 |
25 |
463 |
4308 |
29423 |
25558 |
|
...date precedes bulletin
|
Date: 2025-11-09:
| 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 |
93698 |
11642 |
412 |
421 |
124 |
10 |
0 |
0 |
| OW |
1258 |
1515 |
337 |
853 |
543 |
164 |
3 |
0 |
| VODI |
3047 |
508 |
187 |
718 |
764 |
295 |
26 |
0 |
| ODI |
0 |
68 |
56 |
321 |
521 |
425 |
59 |
0 |
| CDI |
0 |
14 |
28 |
132 |
650 |
995 |
349 |
26 |
| VCDI |
0 |
0 |
5 |
34 |
229 |
4177 |
28355 |
27841 |
|
...date precedes bulletin
|
Date: 2025-11-11:
| 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 |
92786 |
11355 |
303 |
414 |
106 |
11 |
0 |
0 |
| OW |
1173 |
1576 |
393 |
653 |
303 |
19 |
0 |
0 |
| VODI |
3084 |
202 |
197 |
807 |
1013 |
117 |
0 |
0 |
| ODI |
0 |
11 |
31 |
216 |
1185 |
639 |
5 |
6 |
| CDI |
0 |
1 |
6 |
70 |
644 |
1696 |
243 |
54 |
| VCDI |
0 |
0 |
1 |
14 |
74 |
3686 |
24538 |
33178 |
|
...date precedes bulletin
|
Date: 2025-11-13:
| 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 |
91729 |
10514 |
277 |
282 |
97 |
3 |
0 |
0 |
| OW |
1183 |
1456 |
253 |
473 |
223 |
33 |
0 |
0 |
| VODI |
3107 |
1321 |
302 |
861 |
880 |
139 |
0 |
0 |
| ODI |
0 |
280 |
105 |
451 |
943 |
597 |
17 |
0 |
| CDI |
0 |
16 |
11 |
103 |
576 |
2060 |
249 |
23 |
| VCDI |
0 |
9 |
7 |
40 |
134 |
4572 |
25009 |
32475 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
91742 |
10530 |
285 |
313 |
115 |
8 |
0 |
0 |
| OW |
1168 |
1372 |
243 |
421 |
191 |
35 |
0 |
0 |
| VODI |
3109 |
1363 |
295 |
879 |
881 |
128 |
0 |
0 |
| ODI |
0 |
307 |
113 |
424 |
871 |
536 |
18 |
0 |
| CDI |
0 |
16 |
13 |
133 |
641 |
2082 |
280 |
18 |
| VCDI |
0 |
8 |
6 |
40 |
154 |
4615 |
24977 |
32480 |
|
Date: 2025-11-15:
| 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 |
92351 |
9665 |
367 |
264 |
21 |
0 |
0 |
0 |
| OW |
1318 |
1581 |
275 |
468 |
278 |
12 |
0 |
0 |
| VODI |
3384 |
833 |
272 |
639 |
694 |
224 |
2 |
0 |
| ODI |
0 |
221 |
90 |
369 |
547 |
468 |
35 |
0 |
| CDI |
0 |
25 |
30 |
199 |
689 |
1724 |
308 |
13 |
| VCDI |
0 |
8 |
15 |
88 |
417 |
6651 |
28403 |
27862 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
92378 |
9599 |
377 |
302 |
57 |
0 |
0 |
0 |
| OW |
1305 |
1599 |
267 |
407 |
218 |
21 |
0 |
0 |
| VODI |
3370 |
884 |
264 |
660 |
715 |
159 |
5 |
0 |
| ODI |
0 |
216 |
93 |
367 |
537 |
432 |
20 |
0 |
| CDI |
0 |
28 |
34 |
212 |
695 |
1614 |
309 |
7 |
| VCDI |
0 |
7 |
14 |
79 |
424 |
6853 |
28414 |
27868 |
|
Date: 2025-11-17:
| 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 |
91441 |
10994 |
247 |
197 |
19 |
4 |
0 |
0 |
| OW |
1325 |
1455 |
394 |
405 |
89 |
5 |
0 |
0 |
| VODI |
3258 |
281 |
181 |
744 |
712 |
103 |
0 |
0 |
| ODI |
0 |
44 |
61 |
354 |
870 |
305 |
8 |
0 |
| CDI |
0 |
6 |
12 |
110 |
995 |
2104 |
145 |
25 |
| VCDI |
0 |
9 |
1 |
38 |
612 |
9346 |
27166 |
26745 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
91247 |
10206 |
273 |
284 |
64 |
6 |
0 |
0 |
| OW |
1411 |
1615 |
210 |
366 |
272 |
42 |
0 |
0 |
| VODI |
3366 |
746 |
263 |
477 |
779 |
310 |
3 |
0 |
| ODI |
0 |
157 |
99 |
390 |
629 |
509 |
17 |
0 |
| CDI |
0 |
35 |
39 |
282 |
900 |
1286 |
122 |
17 |
| VCDI |
0 |
30 |
12 |
49 |
653 |
9714 |
27177 |
26753 |
|
Date: 2025-11-19:
| 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 |
90117 |
10804 |
247 |
312 |
80 |
13 |
0 |
0 |
| OW |
1218 |
1393 |
295 |
393 |
164 |
24 |
0 |
0 |
| VODI |
3278 |
481 |
256 |
669 |
708 |
183 |
0 |
0 |
| ODI |
0 |
136 |
63 |
316 |
741 |
532 |
12 |
0 |
| CDI |
0 |
64 |
13 |
116 |
616 |
1999 |
316 |
0 |
| VCDI |
0 |
16 |
13 |
39 |
295 |
8820 |
31729 |
24339 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89874 |
9865 |
267 |
337 |
138 |
29 |
3 |
0 |
| OW |
1372 |
1788 |
177 |
275 |
181 |
56 |
7 |
0 |
| VODI |
3367 |
983 |
273 |
570 |
651 |
350 |
7 |
0 |
| ODI |
0 |
173 |
127 |
460 |
632 |
720 |
37 |
0 |
| CDI |
0 |
63 |
33 |
151 |
727 |
1784 |
368 |
0 |
| VCDI |
0 |
22 |
10 |
52 |
275 |
8632 |
31635 |
24339 |
|
Date: 2025-11-21:
| 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 |
89696 |
10264 |
177 |
177 |
34 |
2 |
0 |
0 |
| OW |
1109 |
1647 |
252 |
318 |
129 |
20 |
0 |
0 |
| VODI |
3296 |
721 |
282 |
764 |
602 |
95 |
2 |
0 |
| ODI |
0 |
108 |
111 |
395 |
819 |
354 |
23 |
0 |
| CDI |
0 |
11 |
19 |
226 |
1018 |
1469 |
256 |
0 |
| VCDI |
0 |
20 |
26 |
80 |
505 |
6652 |
31029 |
28102 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89495 |
9596 |
183 |
231 |
134 |
55 |
17 |
0 |
| OW |
1222 |
1599 |
193 |
296 |
100 |
27 |
2 |
0 |
| VODI |
3384 |
1243 |
308 |
676 |
619 |
210 |
19 |
0 |
| ODI |
0 |
250 |
87 |
335 |
798 |
619 |
73 |
0 |
| CDI |
0 |
69 |
86 |
331 |
874 |
1493 |
427 |
7 |
| VCDI |
0 |
14 |
10 |
91 |
582 |
6188 |
30772 |
28095 |
|
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