Validation of sea ice concentration - American sector
Bulletin date: 2025-04-03
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-03-28:
| 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 |
5074 |
2897 |
28 |
47 |
1 |
0 |
0 |
0 |
| OW |
0 |
300 |
67 |
145 |
46 |
11 |
0 |
0 |
| VODI |
0 |
37 |
35 |
236 |
127 |
34 |
4 |
0 |
| ODI |
0 |
0 |
5 |
71 |
317 |
137 |
11 |
0 |
| CDI |
0 |
0 |
0 |
4 |
285 |
584 |
237 |
62 |
| VCDI |
0 |
0 |
0 |
2 |
136 |
2482 |
10134 |
37675 |
|
...date precedes bulletin
|
Date: 2025-03-30:
| 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 |
5156 |
2865 |
20 |
41 |
5 |
0 |
0 |
0 |
| OW |
0 |
374 |
46 |
103 |
89 |
2 |
0 |
0 |
| VODI |
0 |
58 |
54 |
234 |
196 |
64 |
4 |
0 |
| ODI |
0 |
0 |
1 |
197 |
303 |
206 |
11 |
2 |
| CDI |
0 |
0 |
0 |
53 |
246 |
832 |
301 |
119 |
| VCDI |
0 |
0 |
0 |
7 |
126 |
1885 |
11840 |
35791 |
|
...date precedes bulletin
|
Date: 2025-04-01:
| 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 |
5370 |
3055 |
26 |
16 |
0 |
0 |
0 |
0 |
| OW |
0 |
286 |
93 |
197 |
19 |
0 |
0 |
0 |
| VODI |
0 |
8 |
31 |
467 |
343 |
26 |
0 |
0 |
| ODI |
0 |
0 |
0 |
22 |
514 |
218 |
5 |
0 |
| CDI |
0 |
0 |
0 |
3 |
177 |
1308 |
398 |
14 |
| VCDI |
0 |
0 |
0 |
0 |
105 |
1337 |
14379 |
32814 |
|
...date precedes bulletin
|
Date: 2025-04-03:
| 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 |
5502 |
2960 |
24 |
35 |
0 |
0 |
0 |
0 |
| OW |
0 |
298 |
116 |
288 |
62 |
0 |
0 |
0 |
| VODI |
0 |
12 |
36 |
313 |
276 |
186 |
4 |
0 |
| ODI |
0 |
0 |
0 |
10 |
315 |
600 |
63 |
9 |
| CDI |
0 |
0 |
0 |
0 |
53 |
701 |
997 |
47 |
| VCDI |
0 |
0 |
0 |
0 |
34 |
1168 |
9338 |
37784 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5502 |
2980 |
29 |
44 |
2 |
0 |
0 |
0 |
| OW |
0 |
267 |
98 |
249 |
66 |
2 |
0 |
0 |
| VODI |
0 |
23 |
49 |
342 |
268 |
166 |
3 |
0 |
| ODI |
0 |
0 |
0 |
11 |
330 |
593 |
122 |
10 |
| CDI |
0 |
0 |
0 |
0 |
39 |
730 |
961 |
49 |
| VCDI |
0 |
0 |
0 |
0 |
35 |
1164 |
9316 |
37781 |
|
Date: 2025-04-05:
| 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 |
5684 |
2546 |
27 |
20 |
2 |
0 |
0 |
0 |
| OW |
0 |
518 |
127 |
254 |
63 |
1 |
0 |
0 |
| VODI |
0 |
41 |
41 |
316 |
320 |
178 |
0 |
0 |
| ODI |
0 |
0 |
1 |
65 |
201 |
574 |
68 |
31 |
| CDI |
0 |
0 |
0 |
0 |
86 |
1007 |
904 |
171 |
| VCDI |
0 |
0 |
0 |
0 |
8 |
1143 |
8503 |
38331 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5684 |
2556 |
40 |
17 |
0 |
0 |
0 |
0 |
| OW |
0 |
510 |
108 |
224 |
67 |
4 |
0 |
0 |
| VODI |
0 |
39 |
47 |
342 |
295 |
191 |
1 |
0 |
| ODI |
0 |
0 |
1 |
72 |
255 |
538 |
169 |
27 |
| CDI |
0 |
0 |
0 |
0 |
56 |
1012 |
821 |
208 |
| VCDI |
0 |
0 |
0 |
0 |
7 |
1158 |
8484 |
38298 |
|
Date: 2025-04-07:
| 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 |
5541 |
2862 |
54 |
65 |
0 |
0 |
0 |
0 |
| OW |
0 |
349 |
109 |
310 |
36 |
0 |
0 |
0 |
| VODI |
0 |
2 |
11 |
316 |
376 |
47 |
1 |
0 |
| ODI |
0 |
0 |
0 |
1 |
370 |
280 |
21 |
3 |
| CDI |
0 |
0 |
0 |
0 |
131 |
1769 |
285 |
54 |
| VCDI |
0 |
0 |
0 |
0 |
103 |
1769 |
10772 |
35594 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5541 |
2636 |
45 |
58 |
0 |
0 |
0 |
0 |
| OW |
0 |
480 |
63 |
246 |
85 |
14 |
0 |
0 |
| VODI |
0 |
97 |
62 |
315 |
359 |
198 |
1 |
0 |
| ODI |
0 |
0 |
4 |
73 |
321 |
565 |
133 |
2 |
| CDI |
0 |
0 |
0 |
0 |
114 |
1243 |
569 |
28 |
| VCDI |
0 |
0 |
0 |
0 |
137 |
1845 |
10376 |
35621 |
|
Date: 2025-04-09:
| 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 |
5425 |
2883 |
39 |
96 |
9 |
0 |
0 |
0 |
| OW |
0 |
329 |
105 |
346 |
86 |
0 |
0 |
0 |
| VODI |
0 |
9 |
23 |
248 |
428 |
68 |
4 |
0 |
| ODI |
0 |
0 |
0 |
3 |
327 |
240 |
10 |
0 |
| CDI |
0 |
0 |
0 |
3 |
161 |
1363 |
749 |
16 |
| VCDI |
0 |
0 |
0 |
17 |
214 |
1607 |
11328 |
35095 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5425 |
2576 |
26 |
47 |
1 |
0 |
0 |
0 |
| OW |
0 |
481 |
61 |
292 |
100 |
9 |
0 |
0 |
| VODI |
0 |
164 |
80 |
280 |
319 |
161 |
10 |
2 |
| ODI |
0 |
0 |
0 |
73 |
413 |
466 |
121 |
14 |
| CDI |
0 |
0 |
0 |
2 |
138 |
988 |
902 |
89 |
| VCDI |
0 |
0 |
0 |
19 |
254 |
1654 |
11058 |
35006 |
|
Date: 2025-04-11:
| 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 |
5392 |
2864 |
45 |
53 |
31 |
0 |
0 |
0 |
| OW |
0 |
309 |
110 |
309 |
158 |
3 |
0 |
0 |
| VODI |
0 |
3 |
21 |
239 |
362 |
131 |
0 |
0 |
| ODI |
0 |
0 |
0 |
28 |
222 |
387 |
34 |
11 |
| CDI |
0 |
0 |
0 |
115 |
125 |
725 |
1454 |
81 |
| VCDI |
0 |
0 |
0 |
80 |
302 |
1820 |
12528 |
33289 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5392 |
2478 |
38 |
49 |
15 |
0 |
0 |
0 |
| OW |
0 |
488 |
54 |
132 |
146 |
24 |
0 |
1 |
| VODI |
0 |
210 |
76 |
304 |
271 |
189 |
12 |
27 |
| ODI |
0 |
0 |
8 |
122 |
245 |
476 |
165 |
88 |
| CDI |
0 |
0 |
0 |
86 |
122 |
515 |
1391 |
183 |
| VCDI |
0 |
0 |
0 |
131 |
401 |
1862 |
12448 |
33082 |
|
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