Validation of sea ice concentration - American sector
Bulletin date: 2025-10-16
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-10-10:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-10-12:
| 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 |
28426 |
4390 |
158 |
285 |
14 |
0 |
0 |
0 |
| OW |
3 |
425 |
85 |
453 |
214 |
12 |
0 |
0 |
| VODI |
0 |
15 |
42 |
348 |
599 |
216 |
0 |
0 |
| ODI |
0 |
0 |
1 |
78 |
271 |
624 |
53 |
0 |
| CDI |
0 |
0 |
0 |
8 |
101 |
945 |
355 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
32 |
3893 |
12473 |
6712 |
|
...date precedes bulletin
|
Date: 2025-10-14:
| 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 |
30831 |
1441 |
650 |
19 |
0 |
0 |
0 |
0 |
| OW |
108 |
210 |
570 |
118 |
7 |
2 |
0 |
0 |
| VODI |
13 |
70 |
506 |
117 |
53 |
5 |
0 |
0 |
| ODI |
0 |
8 |
507 |
103 |
63 |
32 |
0 |
0 |
| CDI |
0 |
0 |
967 |
310 |
115 |
196 |
28 |
0 |
| VCDI |
0 |
0 |
10212 |
3237 |
1775 |
3050 |
4256 |
1652 |
|
...date precedes bulletin
|
Date: 2025-10-16:
| 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 |
27997 |
4309 |
184 |
147 |
9 |
0 |
0 |
0 |
| OW |
3 |
347 |
133 |
619 |
63 |
4 |
0 |
0 |
| VODI |
0 |
17 |
20 |
447 |
375 |
29 |
0 |
0 |
| ODI |
0 |
0 |
0 |
93 |
472 |
189 |
27 |
0 |
| CDI |
0 |
0 |
0 |
19 |
265 |
777 |
416 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
49 |
2182 |
10541 |
11497 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
27995 |
4364 |
198 |
197 |
15 |
2 |
0 |
0 |
| OW |
5 |
300 |
125 |
550 |
71 |
4 |
0 |
0 |
| VODI |
0 |
9 |
14 |
455 |
348 |
31 |
0 |
0 |
| ODI |
0 |
0 |
0 |
109 |
515 |
215 |
39 |
0 |
| CDI |
0 |
0 |
0 |
15 |
232 |
664 |
497 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
52 |
2265 |
10448 |
11497 |
|
Date: 2025-10-18:
| 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 |
27851 |
4193 |
170 |
274 |
24 |
0 |
0 |
0 |
| OW |
16 |
439 |
150 |
404 |
156 |
26 |
0 |
0 |
| VODI |
1 |
29 |
65 |
377 |
354 |
89 |
0 |
0 |
| ODI |
0 |
0 |
1 |
150 |
412 |
149 |
2 |
0 |
| CDI |
0 |
0 |
0 |
21 |
370 |
604 |
159 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
44 |
2515 |
12454 |
9730 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
27848 |
4208 |
171 |
323 |
44 |
0 |
0 |
0 |
| OW |
19 |
419 |
147 |
343 |
156 |
30 |
0 |
0 |
| VODI |
1 |
34 |
67 |
351 |
320 |
89 |
0 |
0 |
| ODI |
0 |
0 |
1 |
175 |
467 |
155 |
2 |
0 |
| CDI |
0 |
0 |
0 |
30 |
321 |
671 |
202 |
0 |
| VCDI |
0 |
0 |
0 |
6 |
52 |
2438 |
12411 |
9730 |
|
Date: 2025-10-20:
| 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 |
27762 |
4204 |
251 |
210 |
7 |
0 |
0 |
0 |
| OW |
7 |
278 |
150 |
461 |
64 |
0 |
0 |
0 |
| VODI |
1 |
0 |
1 |
449 |
270 |
9 |
5 |
0 |
| ODI |
0 |
0 |
0 |
95 |
479 |
108 |
138 |
0 |
| CDI |
0 |
0 |
0 |
3 |
395 |
950 |
104 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
28 |
2983 |
9601 |
12218 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
27699 |
3996 |
232 |
323 |
55 |
0 |
0 |
0 |
| OW |
70 |
407 |
104 |
334 |
207 |
38 |
0 |
0 |
| VODI |
1 |
68 |
48 |
334 |
320 |
155 |
4 |
0 |
| ODI |
0 |
7 |
18 |
161 |
331 |
285 |
17 |
0 |
| CDI |
0 |
4 |
0 |
53 |
237 |
622 |
153 |
0 |
| VCDI |
0 |
0 |
0 |
13 |
93 |
2950 |
9674 |
12218 |
|
Date: 2025-10-22:
| 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 |
27235 |
3975 |
301 |
484 |
73 |
0 |
0 |
0 |
| OW |
1 |
137 |
60 |
556 |
130 |
17 |
0 |
0 |
| VODI |
2 |
29 |
8 |
317 |
262 |
79 |
2 |
0 |
| ODI |
0 |
1 |
1 |
86 |
332 |
204 |
17 |
0 |
| CDI |
0 |
0 |
0 |
22 |
414 |
817 |
312 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
81 |
2430 |
10346 |
12499 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
27208 |
3817 |
245 |
455 |
161 |
15 |
0 |
0 |
| OW |
29 |
241 |
77 |
382 |
112 |
97 |
10 |
0 |
| VODI |
1 |
52 |
34 |
406 |
240 |
235 |
31 |
0 |
| ODI |
0 |
24 |
13 |
150 |
283 |
214 |
48 |
0 |
| CDI |
0 |
7 |
1 |
60 |
309 |
525 |
296 |
0 |
| VCDI |
0 |
1 |
0 |
13 |
187 |
2461 |
10292 |
12499 |
|
Date: 2025-10-24:
| 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 |
26905 |
3851 |
261 |
499 |
14 |
0 |
0 |
0 |
| OW |
0 |
199 |
90 |
378 |
142 |
9 |
0 |
0 |
| VODI |
3 |
39 |
61 |
282 |
374 |
64 |
0 |
0 |
| ODI |
0 |
2 |
3 |
148 |
259 |
175 |
19 |
0 |
| CDI |
0 |
0 |
0 |
79 |
463 |
678 |
179 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
120 |
3379 |
10360 |
12194 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
26902 |
3643 |
266 |
440 |
136 |
34 |
0 |
0 |
| OW |
4 |
368 |
84 |
330 |
85 |
101 |
0 |
0 |
| VODI |
2 |
48 |
58 |
422 |
254 |
178 |
23 |
0 |
| ODI |
0 |
19 |
5 |
154 |
330 |
232 |
89 |
0 |
| CDI |
0 |
11 |
2 |
42 |
353 |
489 |
304 |
0 |
| VCDI |
0 |
2 |
0 |
0 |
214 |
3271 |
10142 |
12194 |
|
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