Validation of sea ice concentration - Full domain
Bulletin date: 2025-04-17
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
64952 |
16998 |
455 |
501 |
69 |
0 |
0 |
0 |
| OW |
19 |
1029 |
399 |
1136 |
457 |
14 |
0 |
0 |
| VODI |
11 |
227 |
110 |
969 |
1062 |
210 |
0 |
0 |
| ODI |
10 |
45 |
39 |
367 |
1146 |
789 |
37 |
11 |
| CDI |
5 |
23 |
18 |
316 |
1454 |
2940 |
1879 |
85 |
| VCDI |
3 |
1 |
12 |
171 |
867 |
6609 |
28146 |
61152 |
|
...date precedes bulletin
|
Date: 2025-04-13:
| 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 |
64029 |
17393 |
445 |
538 |
67 |
0 |
0 |
0 |
| OW |
23 |
1020 |
392 |
1285 |
450 |
21 |
0 |
0 |
| VODI |
10 |
172 |
78 |
949 |
1157 |
192 |
2 |
0 |
| ODI |
6 |
53 |
24 |
371 |
1197 |
1000 |
104 |
19 |
| CDI |
6 |
21 |
27 |
308 |
1435 |
3349 |
1492 |
109 |
| VCDI |
2 |
0 |
4 |
215 |
761 |
6083 |
30252 |
59682 |
|
...date precedes bulletin
|
Date: 2025-04-15:
| 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 |
64241 |
17837 |
433 |
563 |
33 |
0 |
0 |
0 |
| OW |
9 |
834 |
406 |
1088 |
345 |
8 |
0 |
0 |
| VODI |
8 |
86 |
62 |
1104 |
1147 |
166 |
3 |
0 |
| ODI |
3 |
7 |
7 |
378 |
1752 |
802 |
26 |
23 |
| CDI |
4 |
0 |
0 |
200 |
1630 |
4894 |
1509 |
143 |
| VCDI |
2 |
0 |
0 |
23 |
466 |
5393 |
28996 |
60112 |
|
...date precedes bulletin
|
Date: 2025-04-17:
| 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 |
64843 |
17092 |
461 |
513 |
51 |
0 |
0 |
0 |
| OW |
13 |
1088 |
362 |
895 |
443 |
10 |
0 |
0 |
| VODI |
7 |
182 |
128 |
1113 |
1143 |
252 |
6 |
0 |
| ODI |
4 |
16 |
22 |
498 |
1510 |
1064 |
71 |
8 |
| CDI |
4 |
1 |
0 |
106 |
1583 |
4642 |
1799 |
67 |
| VCDI |
1 |
1 |
1 |
10 |
526 |
5649 |
30840 |
57718 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64844 |
17034 |
443 |
510 |
66 |
0 |
0 |
0 |
| OW |
11 |
1130 |
371 |
897 |
480 |
9 |
0 |
0 |
| VODI |
8 |
202 |
137 |
1113 |
1108 |
286 |
10 |
0 |
| ODI |
4 |
12 |
22 |
506 |
1500 |
1166 |
86 |
8 |
| CDI |
4 |
2 |
1 |
100 |
1568 |
4526 |
2186 |
75 |
| VCDI |
1 |
0 |
0 |
9 |
534 |
5630 |
30434 |
57710 |
|
Date: 2025-04-19:
| 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 |
64292 |
17322 |
479 |
620 |
61 |
0 |
0 |
0 |
| OW |
13 |
1267 |
277 |
906 |
416 |
17 |
0 |
0 |
| VODI |
7 |
298 |
165 |
1228 |
1233 |
325 |
8 |
3 |
| ODI |
3 |
12 |
31 |
501 |
1690 |
905 |
101 |
10 |
| CDI |
3 |
4 |
1 |
176 |
1863 |
3775 |
2222 |
104 |
| VCDI |
1 |
0 |
0 |
25 |
705 |
5117 |
32781 |
55776 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64290 |
17274 |
467 |
668 |
72 |
0 |
0 |
0 |
| OW |
15 |
1286 |
284 |
896 |
472 |
23 |
0 |
0 |
| VODI |
6 |
328 |
166 |
1174 |
1242 |
347 |
10 |
1 |
| ODI |
3 |
13 |
35 |
518 |
1793 |
1012 |
113 |
15 |
| CDI |
4 |
2 |
1 |
169 |
1676 |
3877 |
2469 |
118 |
| VCDI |
1 |
0 |
0 |
31 |
713 |
4880 |
32520 |
55759 |
|
Date: 2025-04-21:
| 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 |
64778 |
17640 |
465 |
724 |
112 |
0 |
0 |
0 |
| OW |
16 |
888 |
483 |
975 |
351 |
16 |
0 |
0 |
| VODI |
6 |
35 |
40 |
1606 |
1545 |
198 |
0 |
6 |
| ODI |
2 |
3 |
0 |
203 |
2116 |
958 |
41 |
33 |
| CDI |
5 |
0 |
0 |
18 |
1221 |
5278 |
1261 |
198 |
| VCDI |
0 |
0 |
0 |
0 |
237 |
3864 |
31388 |
58033 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64767 |
16945 |
414 |
698 |
130 |
0 |
0 |
0 |
| OW |
21 |
1295 |
348 |
861 |
538 |
31 |
0 |
0 |
| VODI |
8 |
303 |
223 |
1248 |
1177 |
478 |
1 |
4 |
| ODI |
6 |
15 |
3 |
559 |
1619 |
1203 |
119 |
16 |
| CDI |
5 |
8 |
0 |
156 |
1558 |
3717 |
2311 |
325 |
| VCDI |
0 |
0 |
0 |
4 |
560 |
4885 |
30259 |
57925 |
|
Date: 2025-04-23:
| 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 |
64828 |
17374 |
478 |
819 |
115 |
0 |
0 |
0 |
| OW |
16 |
920 |
397 |
1217 |
357 |
17 |
2 |
0 |
| VODI |
9 |
49 |
86 |
1436 |
1481 |
257 |
21 |
0 |
| ODI |
2 |
5 |
0 |
256 |
2031 |
1249 |
100 |
11 |
| CDI |
3 |
0 |
0 |
30 |
1090 |
4649 |
3338 |
174 |
| VCDI |
0 |
0 |
0 |
0 |
505 |
2749 |
30539 |
58133 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64815 |
16749 |
428 |
830 |
108 |
1 |
0 |
0 |
| OW |
24 |
1302 |
306 |
954 |
548 |
32 |
7 |
0 |
| VODI |
11 |
261 |
211 |
1304 |
1262 |
544 |
37 |
1 |
| ODI |
3 |
30 |
10 |
524 |
1610 |
1247 |
272 |
22 |
| CDI |
5 |
6 |
6 |
146 |
1398 |
3939 |
4187 |
293 |
| VCDI |
0 |
0 |
0 |
0 |
653 |
3158 |
29497 |
58002 |
|
Date: 2025-04-25:
| 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 |
65684 |
16659 |
414 |
590 |
22 |
0 |
0 |
0 |
| OW |
19 |
1263 |
460 |
1288 |
333 |
23 |
4 |
0 |
| VODI |
6 |
152 |
169 |
1448 |
1515 |
270 |
23 |
0 |
| ODI |
3 |
11 |
18 |
443 |
2150 |
1439 |
177 |
32 |
| CDI |
2 |
0 |
0 |
75 |
1440 |
4725 |
2780 |
187 |
| VCDI |
0 |
0 |
0 |
33 |
587 |
3407 |
30399 |
56493 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
65683 |
15891 |
390 |
691 |
132 |
16 |
0 |
0 |
| OW |
18 |
1593 |
327 |
857 |
514 |
147 |
12 |
0 |
| VODI |
7 |
446 |
242 |
1269 |
1229 |
641 |
116 |
4 |
| ODI |
2 |
126 |
76 |
635 |
1559 |
1138 |
391 |
36 |
| CDI |
4 |
29 |
26 |
385 |
1907 |
4120 |
3608 |
166 |
| VCDI |
0 |
0 |
0 |
40 |
706 |
3802 |
29256 |
56506 |
|
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