Validation of sea ice concentration - Full domain
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 |
65469 |
16632 |
492 |
482 |
70 |
0 |
0 |
0 |
| OW |
0 |
1153 |
288 |
1146 |
253 |
13 |
0 |
0 |
| VODI |
0 |
295 |
120 |
893 |
1047 |
259 |
9 |
0 |
| ODI |
0 |
60 |
54 |
239 |
1019 |
935 |
134 |
12 |
| CDI |
0 |
16 |
32 |
287 |
1015 |
3229 |
1756 |
51 |
| VCDI |
0 |
4 |
5 |
73 |
483 |
5514 |
23728 |
67476 |
|
...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 |
64898 |
16558 |
417 |
486 |
79 |
1 |
0 |
0 |
| OW |
29 |
1277 |
335 |
1061 |
306 |
20 |
0 |
0 |
| VODI |
3 |
344 |
161 |
957 |
941 |
281 |
5 |
0 |
| ODI |
3 |
57 |
61 |
376 |
923 |
829 |
84 |
7 |
| CDI |
1 |
30 |
14 |
262 |
1391 |
4123 |
1554 |
60 |
| VCDI |
5 |
1 |
5 |
57 |
275 |
4283 |
24046 |
68137 |
|
...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 |
64763 |
17197 |
372 |
729 |
91 |
0 |
0 |
0 |
| OW |
9 |
1020 |
358 |
1154 |
331 |
8 |
0 |
0 |
| VODI |
0 |
71 |
131 |
1086 |
1144 |
106 |
7 |
0 |
| ODI |
0 |
3 |
3 |
298 |
1423 |
577 |
14 |
2 |
| CDI |
0 |
1 |
0 |
85 |
1261 |
4512 |
1047 |
69 |
| VCDI |
0 |
4 |
0 |
0 |
316 |
4818 |
25355 |
66378 |
|
...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 |
65057 |
17053 |
414 |
532 |
36 |
0 |
0 |
0 |
| OW |
21 |
1047 |
378 |
1142 |
383 |
24 |
0 |
0 |
| VODI |
9 |
191 |
151 |
940 |
1150 |
169 |
3 |
0 |
| ODI |
7 |
25 |
29 |
377 |
1169 |
693 |
43 |
3 |
| CDI |
4 |
5 |
14 |
294 |
1428 |
3237 |
1670 |
21 |
| VCDI |
5 |
0 |
0 |
126 |
750 |
5447 |
27057 |
63639 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
65065 |
17181 |
405 |
564 |
43 |
0 |
0 |
0 |
| OW |
13 |
958 |
404 |
1168 |
420 |
19 |
0 |
0 |
| VODI |
9 |
155 |
134 |
909 |
1170 |
169 |
2 |
0 |
| ODI |
6 |
23 |
32 |
377 |
1167 |
764 |
57 |
3 |
| CDI |
5 |
4 |
11 |
286 |
1411 |
3282 |
1520 |
29 |
| VCDI |
5 |
0 |
0 |
107 |
705 |
5336 |
27194 |
63631 |
|
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 |
64177 |
17497 |
429 |
558 |
89 |
1 |
0 |
0 |
| OW |
19 |
922 |
401 |
1270 |
488 |
26 |
0 |
0 |
| VODI |
11 |
162 |
108 |
930 |
1062 |
219 |
1 |
0 |
| ODI |
9 |
48 |
19 |
401 |
1091 |
926 |
45 |
5 |
| CDI |
6 |
25 |
37 |
285 |
1528 |
3579 |
1469 |
87 |
| VCDI |
2 |
5 |
25 |
188 |
696 |
6037 |
29623 |
60237 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64184 |
17624 |
455 |
620 |
89 |
1 |
0 |
0 |
| OW |
13 |
820 |
400 |
1253 |
538 |
18 |
0 |
0 |
| VODI |
9 |
142 |
84 |
913 |
1093 |
225 |
1 |
0 |
| ODI |
8 |
49 |
24 |
378 |
1095 |
1025 |
99 |
8 |
| CDI |
8 |
15 |
34 |
300 |
1482 |
3628 |
1619 |
95 |
| VCDI |
2 |
9 |
22 |
168 |
657 |
5891 |
29419 |
60226 |
|
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 |
64012 |
17862 |
494 |
610 |
65 |
0 |
0 |
0 |
| OW |
17 |
809 |
409 |
1151 |
377 |
2 |
0 |
0 |
| VODI |
8 |
61 |
49 |
1208 |
1201 |
111 |
0 |
1 |
| ODI |
4 |
1 |
13 |
257 |
1946 |
703 |
25 |
19 |
| CDI |
5 |
0 |
0 |
223 |
1511 |
5035 |
752 |
102 |
| VCDI |
2 |
0 |
0 |
14 |
378 |
5400 |
31382 |
58524 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64004 |
17578 |
453 |
578 |
66 |
0 |
0 |
0 |
| OW |
21 |
938 |
388 |
1181 |
566 |
5 |
0 |
0 |
| VODI |
10 |
162 |
72 |
891 |
1192 |
240 |
5 |
1 |
| ODI |
5 |
47 |
31 |
387 |
1242 |
1158 |
78 |
47 |
| CDI |
6 |
8 |
19 |
254 |
1567 |
3683 |
1926 |
201 |
| VCDI |
2 |
0 |
2 |
172 |
845 |
6165 |
30150 |
58397 |
|
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 |
64864 |
17190 |
481 |
546 |
43 |
0 |
0 |
0 |
| OW |
7 |
856 |
383 |
1024 |
388 |
11 |
0 |
0 |
| VODI |
8 |
146 |
88 |
1065 |
1123 |
211 |
4 |
0 |
| ODI |
3 |
24 |
16 |
489 |
1601 |
863 |
57 |
6 |
| CDI |
4 |
0 |
0 |
119 |
1449 |
5010 |
1927 |
78 |
| VCDI |
2 |
0 |
0 |
10 |
414 |
5280 |
30066 |
58887 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64855 |
16749 |
442 |
540 |
61 |
0 |
0 |
0 |
| OW |
12 |
1053 |
290 |
1012 |
604 |
24 |
0 |
0 |
| VODI |
10 |
314 |
179 |
785 |
1206 |
399 |
21 |
0 |
| ODI |
5 |
70 |
40 |
583 |
1178 |
1232 |
186 |
28 |
| CDI |
4 |
29 |
17 |
300 |
1177 |
3804 |
2035 |
130 |
| VCDI |
2 |
1 |
0 |
33 |
792 |
5916 |
29812 |
58813 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64801 |
16884 |
420 |
568 |
96 |
1 |
0 |
0 |
| OW |
19 |
1097 |
244 |
852 |
514 |
46 |
3 |
0 |
| VODI |
14 |
364 |
213 |
874 |
1281 |
510 |
19 |
7 |
| ODI |
9 |
88 |
60 |
544 |
1191 |
1282 |
302 |
23 |
| CDI |
4 |
31 |
15 |
270 |
1445 |
3279 |
2334 |
152 |
| VCDI |
1 |
0 |
0 |
66 |
1066 |
5608 |
32350 |
55796 |
|
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