Validation of sea ice concentration - Full domain
Bulletin date: 2025-04-24
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
64815 |
16971 |
445 |
526 |
57 |
1 |
0 |
0 |
| OW |
17 |
1199 |
337 |
855 |
429 |
18 |
0 |
0 |
| VODI |
7 |
267 |
141 |
1163 |
1185 |
307 |
15 |
3 |
| ODI |
4 |
14 |
29 |
499 |
1562 |
1070 |
96 |
11 |
| CDI |
4 |
13 |
0 |
116 |
1698 |
4237 |
2243 |
80 |
| VCDI |
1 |
0 |
0 |
15 |
662 |
5093 |
32654 |
55884 |
|
...date precedes bulletin
|
Date: 2025-04-20:
| 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 |
64557 |
17155 |
426 |
646 |
91 |
0 |
0 |
0 |
| OW |
11 |
1234 |
287 |
972 |
449 |
18 |
0 |
0 |
| VODI |
8 |
281 |
199 |
1292 |
1202 |
330 |
4 |
0 |
| ODI |
4 |
19 |
19 |
551 |
1628 |
975 |
107 |
21 |
| CDI |
5 |
4 |
2 |
127 |
1760 |
3498 |
2180 |
230 |
| VCDI |
0 |
0 |
0 |
7 |
745 |
5075 |
31348 |
57276 |
|
...date precedes bulletin
|
Date: 2025-04-22:
| 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 |
65140 |
17290 |
480 |
755 |
121 |
0 |
0 |
0 |
| OW |
13 |
841 |
463 |
1044 |
376 |
10 |
0 |
0 |
| VODI |
9 |
53 |
78 |
1445 |
1509 |
240 |
3 |
0 |
| ODI |
3 |
4 |
0 |
279 |
1976 |
1015 |
61 |
11 |
| CDI |
5 |
0 |
0 |
46 |
1240 |
5009 |
2132 |
192 |
| VCDI |
0 |
0 |
0 |
0 |
272 |
3138 |
30808 |
58682 |
|
...date precedes bulletin
|
Date: 2025-04-24:
| 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 |
65143 |
16977 |
400 |
833 |
75 |
0 |
0 |
0 |
| OW |
20 |
1000 |
449 |
1276 |
351 |
22 |
1 |
0 |
| VODI |
6 |
81 |
143 |
1389 |
1530 |
283 |
9 |
2 |
| ODI |
3 |
6 |
2 |
334 |
2140 |
1382 |
166 |
31 |
| CDI |
3 |
0 |
1 |
58 |
1144 |
4450 |
3578 |
274 |
| VCDI |
0 |
0 |
0 |
12 |
457 |
2713 |
31199 |
56800 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
65141 |
16982 |
418 |
843 |
74 |
1 |
0 |
0 |
| OW |
21 |
961 |
413 |
1271 |
358 |
17 |
1 |
0 |
| VODI |
7 |
115 |
161 |
1363 |
1490 |
284 |
18 |
3 |
| ODI |
2 |
6 |
2 |
350 |
2188 |
1454 |
202 |
41 |
| CDI |
4 |
0 |
1 |
59 |
1125 |
4420 |
3866 |
368 |
| VCDI |
0 |
0 |
0 |
16 |
462 |
2674 |
30866 |
56695 |
|
Date: 2025-04-26:
| 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 |
65663 |
16752 |
356 |
464 |
45 |
0 |
0 |
0 |
| OW |
16 |
1312 |
412 |
1391 |
420 |
26 |
1 |
0 |
| VODI |
7 |
238 |
191 |
1370 |
1493 |
402 |
48 |
0 |
| ODI |
3 |
33 |
26 |
572 |
2051 |
1490 |
286 |
11 |
| CDI |
2 |
9 |
6 |
140 |
1556 |
4126 |
3186 |
149 |
| VCDI |
0 |
0 |
0 |
47 |
749 |
3299 |
33716 |
52679 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
65655 |
16807 |
382 |
518 |
55 |
0 |
0 |
0 |
| OW |
23 |
1212 |
382 |
1313 |
414 |
24 |
11 |
0 |
| VODI |
6 |
289 |
188 |
1356 |
1494 |
392 |
65 |
0 |
| ODI |
3 |
27 |
33 |
597 |
2091 |
1522 |
343 |
32 |
| CDI |
4 |
9 |
5 |
144 |
1525 |
4051 |
3427 |
202 |
| VCDI |
0 |
0 |
1 |
56 |
735 |
3354 |
33391 |
52605 |
|
Date: 2025-04-28:
| 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 |
67024 |
16110 |
332 |
288 |
22 |
0 |
0 |
0 |
| OW |
53 |
1247 |
734 |
957 |
128 |
6 |
0 |
0 |
| VODI |
10 |
56 |
61 |
2802 |
1098 |
73 |
5 |
0 |
| ODI |
2 |
13 |
3 |
288 |
3420 |
494 |
73 |
0 |
| CDI |
0 |
26 |
0 |
64 |
1160 |
5425 |
770 |
22 |
| VCDI |
0 |
0 |
0 |
3 |
518 |
4151 |
36370 |
50935 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
67013 |
15565 |
346 |
404 |
63 |
7 |
0 |
0 |
| OW |
55 |
1385 |
458 |
1380 |
383 |
50 |
11 |
0 |
| VODI |
15 |
411 |
241 |
1478 |
1675 |
319 |
93 |
1 |
| ODI |
4 |
32 |
64 |
821 |
2132 |
1523 |
260 |
22 |
| CDI |
2 |
10 |
2 |
219 |
1265 |
3866 |
3408 |
145 |
| VCDI |
0 |
49 |
19 |
100 |
828 |
4384 |
33446 |
50789 |
|
Date: 2025-04-30:
| 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 |
66435 |
16308 |
342 |
297 |
7 |
0 |
0 |
0 |
| OW |
8 |
1532 |
599 |
1239 |
255 |
3 |
0 |
2 |
| VODI |
5 |
99 |
155 |
2794 |
1414 |
82 |
10 |
28 |
| ODI |
2 |
8 |
5 |
379 |
2776 |
794 |
57 |
38 |
| CDI |
0 |
4 |
2 |
83 |
1367 |
4982 |
2066 |
166 |
| VCDI |
0 |
0 |
0 |
5 |
759 |
5592 |
34393 |
49651 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
66428 |
15769 |
413 |
538 |
69 |
0 |
0 |
0 |
| OW |
15 |
1590 |
384 |
1565 |
597 |
57 |
4 |
1 |
| VODI |
4 |
536 |
221 |
1560 |
1758 |
392 |
59 |
63 |
| ODI |
3 |
52 |
60 |
800 |
2017 |
1488 |
288 |
59 |
| CDI |
0 |
4 |
5 |
272 |
1270 |
4260 |
4581 |
148 |
| VCDI |
0 |
0 |
20 |
62 |
867 |
5256 |
31594 |
49614 |
|
Date: 2025-05-02:
| 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 |
66609 |
15813 |
248 |
227 |
12 |
0 |
0 |
0 |
| OW |
10 |
1973 |
605 |
1245 |
209 |
1 |
0 |
24 |
| VODI |
2 |
145 |
247 |
2815 |
1556 |
91 |
23 |
60 |
| ODI |
1 |
10 |
6 |
550 |
2841 |
927 |
138 |
51 |
| CDI |
0 |
6 |
0 |
132 |
1804 |
5638 |
2378 |
153 |
| VCDI |
0 |
0 |
0 |
50 |
1014 |
6295 |
31961 |
48873 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
66607 |
15498 |
408 |
558 |
81 |
1 |
0 |
0 |
| OW |
10 |
1772 |
447 |
1683 |
595 |
29 |
1 |
2 |
| VODI |
3 |
625 |
179 |
1610 |
2041 |
398 |
101 |
89 |
| ODI |
1 |
48 |
66 |
752 |
2065 |
1279 |
246 |
80 |
| CDI |
1 |
4 |
6 |
299 |
1394 |
5533 |
4181 |
231 |
| VCDI |
0 |
0 |
0 |
117 |
1260 |
5712 |
29971 |
48759 |
|
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