Validation of sea ice concentration - American sector
Bulletin date: 2025-04-10
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-04-04:
| 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 |
5630 |
2723 |
42 |
16 |
0 |
0 |
0 |
0 |
| OW |
0 |
425 |
102 |
289 |
47 |
0 |
0 |
0 |
| VODI |
0 |
20 |
33 |
264 |
334 |
189 |
9 |
0 |
| ODI |
0 |
0 |
0 |
6 |
273 |
601 |
132 |
12 |
| CDI |
0 |
0 |
0 |
0 |
44 |
706 |
1222 |
46 |
| VCDI |
0 |
0 |
0 |
0 |
49 |
992 |
8804 |
38221 |
|
...date precedes bulletin
|
Date: 2025-04-06:
| 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 |
5593 |
2537 |
43 |
41 |
1 |
0 |
0 |
0 |
| OW |
0 |
548 |
72 |
298 |
89 |
5 |
0 |
0 |
| VODI |
0 |
67 |
61 |
277 |
326 |
199 |
1 |
0 |
| ODI |
0 |
0 |
0 |
68 |
226 |
487 |
60 |
0 |
| CDI |
0 |
0 |
0 |
0 |
117 |
1174 |
778 |
20 |
| VCDI |
0 |
0 |
0 |
0 |
67 |
1983 |
10400 |
35693 |
|
...date precedes bulletin
|
Date: 2025-04-08:
| 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 |
5496 |
2874 |
63 |
58 |
0 |
0 |
0 |
0 |
| OW |
0 |
334 |
107 |
340 |
31 |
0 |
0 |
0 |
| VODI |
0 |
5 |
20 |
328 |
388 |
25 |
7 |
0 |
| ODI |
0 |
0 |
0 |
8 |
391 |
223 |
14 |
1 |
| CDI |
0 |
0 |
0 |
1 |
157 |
1533 |
550 |
33 |
| VCDI |
0 |
0 |
0 |
0 |
108 |
1742 |
11560 |
34834 |
|
...date precedes bulletin
|
Date: 2025-04-10:
| 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 |
5376 |
2901 |
54 |
65 |
14 |
0 |
0 |
0 |
| OW |
0 |
314 |
99 |
334 |
143 |
11 |
0 |
0 |
| VODI |
0 |
8 |
20 |
223 |
425 |
97 |
3 |
0 |
| ODI |
0 |
0 |
0 |
15 |
219 |
350 |
42 |
3 |
| CDI |
0 |
0 |
0 |
43 |
149 |
847 |
1402 |
20 |
| VCDI |
0 |
0 |
0 |
58 |
290 |
1748 |
12163 |
33795 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5376 |
2973 |
51 |
99 |
15 |
0 |
0 |
0 |
| OW |
0 |
243 |
105 |
326 |
172 |
7 |
0 |
0 |
| VODI |
0 |
7 |
17 |
202 |
437 |
106 |
2 |
0 |
| ODI |
0 |
0 |
0 |
11 |
176 |
391 |
56 |
3 |
| CDI |
0 |
0 |
0 |
52 |
172 |
772 |
1232 |
25 |
| VCDI |
0 |
0 |
0 |
48 |
268 |
1777 |
12320 |
33790 |
|
Date: 2025-04-12:
| 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 |
5214 |
2877 |
61 |
66 |
9 |
0 |
0 |
0 |
| OW |
0 |
269 |
124 |
394 |
151 |
9 |
0 |
0 |
| VODI |
0 |
0 |
5 |
230 |
416 |
95 |
0 |
0 |
| ODI |
0 |
0 |
0 |
37 |
241 |
410 |
31 |
0 |
| CDI |
0 |
0 |
20 |
137 |
178 |
1051 |
705 |
37 |
| VCDI |
0 |
4 |
13 |
102 |
229 |
2308 |
13296 |
32512 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5214 |
2959 |
78 |
106 |
6 |
0 |
0 |
0 |
| OW |
0 |
187 |
109 |
376 |
193 |
3 |
0 |
0 |
| VODI |
0 |
0 |
3 |
205 |
430 |
98 |
0 |
0 |
| ODI |
0 |
0 |
0 |
39 |
189 |
452 |
40 |
0 |
| CDI |
0 |
0 |
22 |
161 |
186 |
1007 |
838 |
44 |
| VCDI |
0 |
4 |
11 |
79 |
220 |
2313 |
13154 |
32505 |
|
Date: 2025-04-14:
| 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 |
4952 |
2965 |
43 |
84 |
3 |
0 |
0 |
0 |
| OW |
0 |
255 |
99 |
240 |
119 |
1 |
0 |
0 |
| VODI |
0 |
0 |
1 |
313 |
436 |
46 |
0 |
0 |
| ODI |
0 |
0 |
0 |
54 |
586 |
315 |
24 |
4 |
| CDI |
0 |
0 |
0 |
113 |
423 |
1821 |
330 |
29 |
| VCDI |
0 |
0 |
0 |
7 |
214 |
2987 |
14375 |
30392 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
4952 |
2957 |
65 |
134 |
4 |
0 |
0 |
0 |
| OW |
0 |
263 |
78 |
323 |
262 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
155 |
535 |
131 |
5 |
0 |
| ODI |
0 |
0 |
0 |
36 |
284 |
498 |
46 |
24 |
| CDI |
0 |
0 |
0 |
73 |
252 |
1154 |
662 |
101 |
| VCDI |
0 |
0 |
0 |
90 |
444 |
3387 |
14016 |
30300 |
|
Date: 2025-04-16:
| 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 |
4922 |
2898 |
55 |
72 |
10 |
0 |
0 |
0 |
| OW |
0 |
315 |
102 |
258 |
138 |
9 |
0 |
0 |
| VODI |
0 |
4 |
14 |
256 |
491 |
81 |
2 |
0 |
| ODI |
0 |
0 |
0 |
49 |
575 |
366 |
38 |
6 |
| CDI |
0 |
0 |
0 |
23 |
420 |
1970 |
637 |
38 |
| VCDI |
0 |
0 |
0 |
9 |
289 |
3059 |
11828 |
32297 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
4922 |
2922 |
90 |
113 |
6 |
0 |
0 |
0 |
| OW |
0 |
279 |
58 |
312 |
256 |
0 |
0 |
0 |
| VODI |
0 |
16 |
23 |
172 |
597 |
191 |
15 |
0 |
| ODI |
0 |
0 |
0 |
31 |
358 |
525 |
120 |
21 |
| CDI |
0 |
0 |
0 |
22 |
212 |
1372 |
641 |
65 |
| VCDI |
0 |
0 |
0 |
17 |
494 |
3397 |
11729 |
32255 |
|
Date: 2025-04-18:
| 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 |
4940 |
2739 |
33 |
69 |
24 |
1 |
0 |
0 |
| OW |
0 |
498 |
92 |
211 |
132 |
8 |
0 |
0 |
| VODI |
0 |
19 |
25 |
343 |
584 |
107 |
15 |
0 |
| ODI |
0 |
0 |
0 |
84 |
684 |
410 |
48 |
0 |
| CDI |
0 |
0 |
0 |
25 |
598 |
1839 |
469 |
6 |
| VCDI |
0 |
0 |
0 |
15 |
464 |
3009 |
13615 |
30125 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
4940 |
3041 |
60 |
103 |
24 |
0 |
0 |
0 |
| OW |
0 |
212 |
69 |
336 |
184 |
1 |
0 |
0 |
| VODI |
0 |
3 |
21 |
219 |
737 |
153 |
16 |
0 |
| ODI |
0 |
0 |
0 |
42 |
501 |
604 |
65 |
0 |
| CDI |
0 |
0 |
0 |
37 |
451 |
1435 |
461 |
11 |
| VCDI |
0 |
0 |
0 |
10 |
589 |
3181 |
13605 |
30120 |
|
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