Validation of sea ice concentration - Full domain
Bulletin date: 2025-05-22
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-05-16:
| 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 |
61875 |
11859 |
58 |
44 |
8 |
2 |
0 |
17 |
| OW |
895 |
2735 |
384 |
340 |
101 |
10 |
16 |
31 |
| VODI |
2218 |
1119 |
664 |
2110 |
1041 |
109 |
77 |
59 |
| ODI |
1269 |
299 |
175 |
1305 |
2538 |
904 |
335 |
48 |
| CDI |
0 |
147 |
134 |
785 |
2664 |
6754 |
3482 |
32 |
| VCDI |
0 |
146 |
32 |
201 |
695 |
6706 |
49793 |
16594 |
|
...date precedes bulletin
|
Date: 2025-05-18:
| 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 |
61105 |
12458 |
63 |
48 |
21 |
0 |
0 |
16 |
| OW |
829 |
2763 |
388 |
422 |
153 |
13 |
4 |
27 |
| VODI |
2136 |
1241 |
696 |
2230 |
928 |
115 |
45 |
74 |
| ODI |
1471 |
373 |
238 |
1275 |
2505 |
882 |
365 |
100 |
| CDI |
0 |
217 |
199 |
831 |
2771 |
6901 |
3637 |
441 |
| VCDI |
0 |
22 |
21 |
177 |
557 |
7174 |
49366 |
15512 |
|
...date precedes bulletin
|
Date: 2025-05-20:
| 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 |
61140 |
13446 |
112 |
102 |
31 |
0 |
1 |
11 |
| OW |
833 |
2854 |
637 |
650 |
135 |
23 |
3 |
10 |
| VODI |
2201 |
881 |
711 |
2608 |
1149 |
123 |
40 |
41 |
| ODI |
1400 |
117 |
168 |
1020 |
3102 |
1264 |
139 |
71 |
| CDI |
0 |
52 |
58 |
412 |
2142 |
8184 |
2519 |
95 |
| VCDI |
0 |
11 |
21 |
82 |
308 |
7673 |
46007 |
18223 |
|
...date precedes bulletin
|
Date: 2025-05-22:
| 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 |
61211 |
13361 |
137 |
112 |
22 |
2 |
1 |
0 |
| OW |
841 |
2994 |
661 |
793 |
145 |
16 |
5 |
13 |
| VODI |
2245 |
984 |
701 |
2506 |
1058 |
147 |
69 |
50 |
| ODI |
1347 |
192 |
237 |
1114 |
3095 |
1142 |
190 |
76 |
| CDI |
0 |
73 |
95 |
552 |
2544 |
8661 |
3566 |
525 |
| VCDI |
0 |
14 |
13 |
86 |
304 |
7340 |
47560 |
14010 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61211 |
13424 |
143 |
125 |
19 |
3 |
1 |
6 |
| OW |
841 |
2938 |
648 |
715 |
145 |
12 |
4 |
16 |
| VODI |
2245 |
982 |
697 |
2570 |
1107 |
155 |
63 |
50 |
| ODI |
1347 |
185 |
237 |
1083 |
3090 |
1170 |
211 |
72 |
| CDI |
0 |
77 |
109 |
575 |
2496 |
8695 |
3559 |
437 |
| VCDI |
0 |
12 |
10 |
95 |
311 |
7273 |
47553 |
14093 |
|
Date: 2025-05-24:
| 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 |
61790 |
12920 |
113 |
75 |
3 |
0 |
0 |
0 |
| OW |
849 |
3382 |
719 |
741 |
111 |
24 |
14 |
5 |
| VODI |
2296 |
1167 |
716 |
2234 |
1131 |
257 |
128 |
9 |
| ODI |
1287 |
247 |
228 |
1199 |
3192 |
1142 |
354 |
7 |
| CDI |
0 |
90 |
121 |
625 |
2802 |
8998 |
3496 |
49 |
| VCDI |
0 |
14 |
15 |
89 |
495 |
7788 |
48177 |
11711 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61790 |
12969 |
116 |
84 |
4 |
0 |
1 |
0 |
| OW |
849 |
3355 |
717 |
703 |
110 |
26 |
17 |
8 |
| VODI |
2295 |
1156 |
720 |
2251 |
1219 |
235 |
138 |
4 |
| ODI |
1288 |
230 |
218 |
1162 |
3132 |
1179 |
364 |
15 |
| CDI |
0 |
96 |
125 |
675 |
2785 |
9116 |
3635 |
47 |
| VCDI |
0 |
14 |
16 |
88 |
484 |
7653 |
48014 |
11707 |
|
Date: 2025-05-26:
| 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 |
62848 |
13602 |
149 |
46 |
1 |
0 |
0 |
0 |
| OW |
852 |
2997 |
781 |
724 |
82 |
13 |
7 |
0 |
| VODI |
2345 |
779 |
690 |
2484 |
1000 |
213 |
36 |
3 |
| ODI |
1232 |
82 |
107 |
1082 |
3850 |
1442 |
116 |
3 |
| CDI |
0 |
40 |
64 |
373 |
2283 |
10626 |
2627 |
10 |
| VCDI |
0 |
19 |
10 |
51 |
267 |
7534 |
47061 |
12279 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
62823 |
12431 |
128 |
50 |
6 |
2 |
1 |
0 |
| OW |
878 |
3267 |
647 |
714 |
137 |
37 |
17 |
1 |
| VODI |
2357 |
1282 |
654 |
2064 |
1197 |
449 |
154 |
5 |
| ODI |
1219 |
369 |
214 |
1126 |
2863 |
1491 |
544 |
17 |
| CDI |
0 |
143 |
126 |
656 |
2665 |
8655 |
5934 |
84 |
| VCDI |
0 |
27 |
32 |
150 |
615 |
9194 |
43197 |
12188 |
|
Date: 2025-05-28:
| 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 |
64703 |
12329 |
57 |
26 |
2 |
0 |
0 |
0 |
| OW |
863 |
3336 |
681 |
733 |
125 |
26 |
1 |
0 |
| VODI |
2405 |
982 |
675 |
2256 |
1002 |
208 |
18 |
0 |
| ODI |
1160 |
124 |
146 |
1262 |
3238 |
1217 |
86 |
0 |
| CDI |
0 |
80 |
71 |
455 |
3090 |
10480 |
3167 |
0 |
| VCDI |
0 |
26 |
24 |
207 |
2170 |
6893 |
42857 |
13629 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64703 |
11021 |
72 |
54 |
8 |
0 |
1 |
0 |
| OW |
867 |
3474 |
594 |
904 |
177 |
31 |
3 |
0 |
| VODI |
2418 |
1596 |
576 |
1852 |
1270 |
416 |
57 |
0 |
| ODI |
1143 |
491 |
211 |
1208 |
2676 |
1557 |
397 |
0 |
| CDI |
0 |
235 |
168 |
649 |
2971 |
9604 |
6738 |
0 |
| VCDI |
0 |
60 |
33 |
272 |
2525 |
7216 |
38933 |
13629 |
|
Date: 2025-05-30:
| 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 |
64933 |
12303 |
67 |
31 |
5 |
0 |
0 |
0 |
| OW |
881 |
3470 |
638 |
738 |
154 |
20 |
2 |
0 |
| VODI |
2469 |
1351 |
681 |
2043 |
1060 |
202 |
24 |
0 |
| ODI |
1082 |
318 |
192 |
1165 |
3028 |
1133 |
191 |
0 |
| CDI |
0 |
154 |
112 |
627 |
3251 |
9081 |
5216 |
1 |
| VCDI |
0 |
56 |
46 |
238 |
663 |
11080 |
39873 |
12231 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64919 |
11012 |
100 |
75 |
30 |
5 |
1 |
0 |
| OW |
900 |
3430 |
592 |
954 |
277 |
65 |
8 |
0 |
| VODI |
2488 |
1894 |
546 |
1629 |
1364 |
441 |
103 |
0 |
| ODI |
1058 |
783 |
239 |
1092 |
2490 |
1605 |
420 |
0 |
| CDI |
0 |
443 |
202 |
798 |
3068 |
8773 |
7862 |
82 |
| VCDI |
0 |
90 |
57 |
294 |
932 |
10627 |
36912 |
12150 |
|
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