Validation of sea ice concentration - American sector
Bulletin date: 2025-11-06
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-10-31:
| 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 |
10706 |
3947 |
211 |
242 |
72 |
4 |
0 |
0 |
| OW |
0 |
340 |
181 |
350 |
93 |
5 |
0 |
0 |
| VODI |
0 |
77 |
103 |
313 |
225 |
39 |
0 |
0 |
| ODI |
0 |
4 |
20 |
191 |
327 |
179 |
2 |
0 |
| CDI |
0 |
0 |
0 |
47 |
323 |
683 |
123 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
39 |
1564 |
11927 |
13529 |
|
...date precedes bulletin
|
Date: 2025-11-02:
| 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 |
10618 |
3851 |
204 |
363 |
27 |
0 |
0 |
0 |
| OW |
0 |
496 |
137 |
306 |
98 |
2 |
0 |
0 |
| VODI |
0 |
214 |
99 |
248 |
281 |
36 |
0 |
0 |
| ODI |
0 |
58 |
50 |
169 |
304 |
94 |
13 |
0 |
| CDI |
0 |
27 |
23 |
78 |
391 |
378 |
52 |
0 |
| VCDI |
0 |
3 |
7 |
44 |
148 |
1599 |
11151 |
14297 |
|
...date precedes bulletin
|
Date: 2025-11-04:
| 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 |
10115 |
4014 |
270 |
437 |
76 |
0 |
0 |
0 |
| OW |
0 |
609 |
200 |
322 |
163 |
1 |
0 |
0 |
| VODI |
0 |
67 |
94 |
370 |
349 |
20 |
0 |
0 |
| ODI |
0 |
1 |
18 |
178 |
403 |
78 |
7 |
0 |
| CDI |
0 |
0 |
2 |
31 |
409 |
430 |
65 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
107 |
1801 |
12275 |
12949 |
|
...date precedes bulletin
|
Date: 2025-11-06:
| 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 |
9723 |
3526 |
284 |
436 |
79 |
0 |
0 |
0 |
| OW |
0 |
349 |
169 |
522 |
447 |
45 |
0 |
0 |
| VODI |
0 |
105 |
87 |
305 |
492 |
144 |
0 |
0 |
| ODI |
0 |
15 |
33 |
144 |
352 |
155 |
7 |
0 |
| CDI |
0 |
0 |
3 |
84 |
278 |
338 |
130 |
0 |
| VCDI |
0 |
0 |
0 |
9 |
349 |
1672 |
9825 |
15759 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
9722 |
3514 |
310 |
544 |
186 |
7 |
0 |
0 |
| OW |
1 |
341 |
138 |
357 |
327 |
43 |
0 |
0 |
| VODI |
0 |
119 |
87 |
332 |
468 |
138 |
0 |
0 |
| ODI |
0 |
21 |
37 |
169 |
309 |
154 |
3 |
0 |
| CDI |
0 |
0 |
4 |
90 |
336 |
334 |
125 |
0 |
| VCDI |
0 |
0 |
0 |
8 |
371 |
1678 |
9834 |
15759 |
|
Date: 2025-11-08:
| 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 |
9539 |
3287 |
184 |
210 |
65 |
12 |
0 |
0 |
| OW |
0 |
388 |
220 |
558 |
311 |
171 |
0 |
0 |
| VODI |
0 |
142 |
86 |
457 |
378 |
205 |
8 |
0 |
| ODI |
0 |
19 |
33 |
202 |
349 |
183 |
26 |
0 |
| CDI |
0 |
1 |
9 |
71 |
337 |
439 |
210 |
1 |
| VCDI |
0 |
0 |
0 |
25 |
323 |
1580 |
10466 |
15371 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
9532 |
3375 |
228 |
380 |
103 |
32 |
0 |
0 |
| OW |
7 |
299 |
174 |
364 |
276 |
141 |
0 |
0 |
| VODI |
0 |
153 |
98 |
372 |
343 |
211 |
2 |
0 |
| ODI |
0 |
10 |
30 |
251 |
279 |
199 |
31 |
0 |
| CDI |
0 |
0 |
2 |
132 |
418 |
422 |
221 |
1 |
| VCDI |
0 |
0 |
0 |
24 |
344 |
1585 |
10456 |
15371 |
|
Date: 2025-11-10:
| 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 |
9147 |
3220 |
205 |
302 |
137 |
21 |
0 |
0 |
| OW |
10 |
404 |
114 |
360 |
333 |
139 |
0 |
0 |
| VODI |
0 |
206 |
61 |
254 |
418 |
258 |
29 |
0 |
| ODI |
0 |
33 |
37 |
127 |
358 |
193 |
50 |
0 |
| CDI |
0 |
11 |
13 |
87 |
523 |
380 |
144 |
1 |
| VCDI |
0 |
3 |
5 |
29 |
201 |
1302 |
9028 |
17723 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
9140 |
3192 |
199 |
270 |
113 |
18 |
0 |
0 |
| OW |
17 |
411 |
101 |
371 |
355 |
120 |
0 |
0 |
| VODI |
0 |
223 |
79 |
253 |
434 |
283 |
10 |
0 |
| ODI |
0 |
36 |
40 |
142 |
342 |
209 |
62 |
0 |
| CDI |
0 |
13 |
12 |
99 |
499 |
415 |
203 |
2 |
| VCDI |
0 |
2 |
4 |
24 |
227 |
1248 |
8976 |
17722 |
|
Date: 2025-11-12:
| 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 |
9387 |
2722 |
112 |
162 |
48 |
5 |
0 |
0 |
| OW |
6 |
441 |
179 |
235 |
126 |
37 |
0 |
0 |
| VODI |
0 |
139 |
131 |
425 |
418 |
128 |
3 |
0 |
| ODI |
0 |
8 |
27 |
126 |
552 |
527 |
8 |
0 |
| CDI |
0 |
0 |
4 |
63 |
207 |
906 |
109 |
0 |
| VCDI |
0 |
0 |
1 |
21 |
91 |
1148 |
9668 |
17696 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
9341 |
2622 |
106 |
179 |
106 |
32 |
0 |
0 |
| OW |
51 |
337 |
115 |
204 |
233 |
119 |
1 |
0 |
| VODI |
1 |
220 |
146 |
355 |
394 |
397 |
19 |
0 |
| ODI |
0 |
112 |
49 |
154 |
258 |
293 |
62 |
0 |
| CDI |
0 |
14 |
29 |
98 |
315 |
701 |
156 |
0 |
| VCDI |
0 |
5 |
9 |
42 |
136 |
1209 |
9550 |
17696 |
|
Date: 2025-11-14:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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