Validation of sea ice concentration - Full domain
Bulletin date: 2025-04-10
Data source: OSI SAF N.H. AMSR 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 |
58948 |
13768 |
226 |
126 |
59 |
18 |
2 |
0 |
| OW |
632 |
1030 |
294 |
464 |
145 |
69 |
10 |
0 |
| VODI |
1843 |
322 |
127 |
488 |
576 |
168 |
23 |
0 |
| ODI |
1745 |
130 |
42 |
166 |
487 |
522 |
89 |
0 |
| CDI |
0 |
100 |
69 |
189 |
764 |
2314 |
1128 |
2 |
| VCDI |
0 |
24 |
22 |
85 |
438 |
5431 |
27986 |
59739 |
|
...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 |
58323 |
13848 |
198 |
175 |
73 |
23 |
0 |
0 |
| OW |
683 |
992 |
275 |
474 |
169 |
56 |
13 |
0 |
| VODI |
1837 |
345 |
151 |
472 |
496 |
205 |
29 |
0 |
| ODI |
1753 |
142 |
56 |
176 |
522 |
487 |
120 |
4 |
| CDI |
0 |
68 |
67 |
235 |
843 |
2864 |
1490 |
18 |
| VCDI |
0 |
20 |
17 |
62 |
373 |
3673 |
31427 |
57556 |
|
...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 |
58163 |
14027 |
484 |
283 |
84 |
7 |
0 |
0 |
| OW |
644 |
1045 |
281 |
494 |
209 |
51 |
5 |
0 |
| VODI |
1845 |
202 |
167 |
600 |
618 |
214 |
55 |
0 |
| ODI |
1743 |
16 |
47 |
287 |
742 |
548 |
78 |
9 |
| CDI |
0 |
5 |
10 |
144 |
835 |
2801 |
1218 |
43 |
| VCDI |
0 |
3 |
5 |
39 |
288 |
4319 |
29187 |
58965 |
|
...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 |
58063 |
14582 |
184 |
209 |
39 |
0 |
0 |
0 |
| OW |
635 |
1069 |
256 |
544 |
226 |
28 |
6 |
0 |
| VODI |
1849 |
297 |
180 |
575 |
645 |
186 |
34 |
0 |
| ODI |
1737 |
79 |
76 |
305 |
653 |
532 |
101 |
0 |
| CDI |
0 |
47 |
59 |
327 |
943 |
2331 |
931 |
9 |
| VCDI |
0 |
8 |
19 |
223 |
628 |
4758 |
29548 |
57889 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58063 |
14630 |
182 |
216 |
44 |
0 |
0 |
0 |
| OW |
635 |
1068 |
273 |
558 |
233 |
30 |
6 |
0 |
| VODI |
1852 |
254 |
172 |
575 |
651 |
183 |
32 |
0 |
| ODI |
1734 |
80 |
76 |
299 |
691 |
565 |
103 |
0 |
| CDI |
0 |
41 |
53 |
332 |
917 |
2439 |
995 |
10 |
| VCDI |
0 |
9 |
18 |
203 |
598 |
4618 |
29484 |
57888 |
|
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 |
58310 |
14093 |
206 |
221 |
70 |
11 |
0 |
0 |
| OW |
623 |
1053 |
285 |
545 |
265 |
57 |
11 |
0 |
| VODI |
1852 |
279 |
162 |
552 |
565 |
236 |
40 |
0 |
| ODI |
1734 |
104 |
69 |
266 |
657 |
622 |
140 |
0 |
| CDI |
0 |
113 |
49 |
319 |
878 |
2662 |
1594 |
25 |
| VCDI |
0 |
72 |
48 |
188 |
643 |
4791 |
35868 |
50532 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58310 |
14138 |
222 |
229 |
77 |
13 |
0 |
0 |
| OW |
623 |
1052 |
276 |
556 |
262 |
55 |
9 |
0 |
| VODI |
1857 |
236 |
161 |
561 |
587 |
239 |
38 |
0 |
| ODI |
1729 |
111 |
63 |
243 |
686 |
719 |
191 |
1 |
| CDI |
0 |
113 |
50 |
323 |
859 |
2707 |
1649 |
33 |
| VCDI |
0 |
64 |
47 |
179 |
607 |
4646 |
35766 |
50523 |
|
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 |
57940 |
14848 |
215 |
275 |
63 |
16 |
0 |
0 |
| OW |
626 |
987 |
300 |
539 |
218 |
45 |
2 |
0 |
| VODI |
1865 |
203 |
187 |
759 |
562 |
227 |
35 |
0 |
| ODI |
1720 |
41 |
40 |
285 |
957 |
706 |
108 |
0 |
| CDI |
0 |
26 |
44 |
304 |
964 |
3032 |
1354 |
9 |
| VCDI |
0 |
0 |
0 |
60 |
351 |
3833 |
38890 |
48174 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
57938 |
14547 |
174 |
220 |
59 |
10 |
0 |
0 |
| OW |
628 |
1117 |
305 |
506 |
208 |
61 |
3 |
0 |
| VODI |
1863 |
257 |
170 |
596 |
513 |
259 |
47 |
0 |
| ODI |
1722 |
105 |
56 |
344 |
663 |
823 |
215 |
3 |
| CDI |
0 |
50 |
56 |
339 |
1029 |
2472 |
2382 |
18 |
| VCDI |
0 |
29 |
25 |
217 |
643 |
4234 |
37742 |
48162 |
|
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 |
58492 |
14522 |
232 |
206 |
57 |
5 |
0 |
0 |
| OW |
649 |
915 |
272 |
469 |
210 |
69 |
4 |
0 |
| VODI |
1868 |
304 |
175 |
560 |
533 |
314 |
41 |
0 |
| ODI |
1717 |
71 |
76 |
367 |
791 |
705 |
163 |
0 |
| CDI |
0 |
10 |
9 |
205 |
930 |
3062 |
2188 |
22 |
| VCDI |
0 |
0 |
4 |
78 |
382 |
3743 |
36663 |
49727 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58492 |
13964 |
208 |
209 |
57 |
10 |
0 |
0 |
| OW |
649 |
1112 |
231 |
433 |
276 |
88 |
8 |
0 |
| VODI |
1868 |
521 |
170 |
394 |
474 |
398 |
67 |
0 |
| ODI |
1717 |
148 |
102 |
386 |
718 |
778 |
280 |
3 |
| CDI |
0 |
76 |
49 |
325 |
732 |
2533 |
2310 |
67 |
| VCDI |
0 |
1 |
8 |
138 |
646 |
4091 |
36394 |
49679 |
|
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 |
58426 |
14441 |
219 |
227 |
52 |
10 |
0 |
0 |
| OW |
689 |
1029 |
221 |
420 |
263 |
96 |
3 |
0 |
| VODI |
1881 |
388 |
225 |
574 |
501 |
353 |
63 |
3 |
| ODI |
1702 |
60 |
85 |
412 |
719 |
794 |
247 |
8 |
| CDI |
0 |
28 |
13 |
235 |
920 |
2447 |
2687 |
57 |
| VCDI |
0 |
4 |
13 |
96 |
621 |
3465 |
38387 |
47726 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58430 |
13994 |
202 |
235 |
66 |
23 |
2 |
0 |
| OW |
685 |
1135 |
196 |
382 |
304 |
113 |
13 |
0 |
| VODI |
1884 |
555 |
186 |
490 |
412 |
442 |
72 |
3 |
| ODI |
1699 |
183 |
123 |
427 |
623 |
720 |
370 |
33 |
| CDI |
0 |
75 |
41 |
298 |
804 |
1949 |
2772 |
116 |
| VCDI |
0 |
8 |
28 |
132 |
867 |
3918 |
38158 |
47642 |
|
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