Validation of sea ice concentration - Full domain
Bulletin date: 2025-03-27
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-03-21:
| 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 |
64496 |
16892 |
323 |
453 |
67 |
0 |
0 |
0 |
| OW |
0 |
1003 |
367 |
1040 |
288 |
8 |
0 |
0 |
| VODI |
0 |
273 |
125 |
917 |
973 |
75 |
0 |
0 |
| ODI |
0 |
36 |
47 |
429 |
1183 |
475 |
12 |
3 |
| CDI |
0 |
7 |
11 |
239 |
1694 |
3192 |
1672 |
32 |
| VCDI |
0 |
0 |
0 |
154 |
813 |
8718 |
33080 |
55646 |
|
...date precedes bulletin
|
Date: 2025-03-23:
| 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 |
64489 |
17214 |
284 |
344 |
35 |
0 |
0 |
0 |
| OW |
0 |
1059 |
437 |
1028 |
226 |
6 |
0 |
0 |
| VODI |
0 |
305 |
106 |
978 |
754 |
104 |
0 |
0 |
| ODI |
0 |
70 |
37 |
422 |
964 |
492 |
36 |
14 |
| CDI |
0 |
28 |
23 |
275 |
1719 |
1917 |
1712 |
254 |
| VCDI |
0 |
14 |
6 |
193 |
535 |
7945 |
28328 |
62390 |
|
...date precedes bulletin
|
Date: 2025-03-25:
| 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 |
65266 |
16873 |
160 |
803 |
8 |
0 |
0 |
0 |
| OW |
0 |
1126 |
385 |
1097 |
73 |
0 |
0 |
0 |
| VODI |
0 |
183 |
149 |
1506 |
362 |
29 |
0 |
0 |
| ODI |
0 |
32 |
18 |
1006 |
885 |
186 |
2 |
2 |
| CDI |
0 |
19 |
11 |
2032 |
595 |
1916 |
293 |
25 |
| VCDI |
0 |
1 |
0 |
19507 |
2397 |
4844 |
19012 |
53940 |
|
...date precedes bulletin
|
Date: 2025-03-27:
| 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 |
66575 |
15843 |
370 |
343 |
31 |
0 |
0 |
0 |
| OW |
1 |
1266 |
429 |
794 |
191 |
5 |
0 |
0 |
| VODI |
0 |
318 |
156 |
1070 |
545 |
103 |
0 |
0 |
| ODI |
0 |
84 |
33 |
471 |
1209 |
430 |
8 |
0 |
| CDI |
0 |
50 |
35 |
191 |
1330 |
2966 |
597 |
74 |
| VCDI |
0 |
19 |
22 |
188 |
709 |
7131 |
25565 |
65591 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
66575 |
15924 |
392 |
362 |
39 |
0 |
0 |
0 |
| OW |
1 |
1157 |
414 |
816 |
197 |
13 |
0 |
0 |
| VODI |
0 |
343 |
149 |
1062 |
597 |
98 |
0 |
0 |
| ODI |
0 |
92 |
35 |
441 |
1190 |
443 |
13 |
0 |
| CDI |
0 |
45 |
39 |
195 |
1266 |
2949 |
727 |
93 |
| VCDI |
0 |
19 |
16 |
181 |
726 |
7132 |
25430 |
65572 |
|
Date: 2025-03-29:
| 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 |
66191 |
15983 |
361 |
362 |
55 |
0 |
0 |
0 |
| OW |
19 |
1480 |
382 |
765 |
236 |
27 |
0 |
0 |
| VODI |
9 |
343 |
166 |
1120 |
539 |
103 |
4 |
0 |
| ODI |
3 |
113 |
14 |
460 |
1251 |
444 |
24 |
2 |
| CDI |
1 |
78 |
33 |
210 |
1349 |
3230 |
929 |
91 |
| VCDI |
4 |
26 |
18 |
158 |
732 |
6986 |
26293 |
64149 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
66190 |
16153 |
376 |
390 |
71 |
0 |
0 |
0 |
| OW |
17 |
1288 |
363 |
767 |
225 |
30 |
0 |
0 |
| VODI |
12 |
366 |
172 |
1099 |
570 |
99 |
3 |
0 |
| ODI |
3 |
113 |
18 |
464 |
1272 |
470 |
23 |
3 |
| CDI |
1 |
81 |
34 |
216 |
1242 |
3201 |
1094 |
93 |
| VCDI |
4 |
22 |
11 |
139 |
782 |
6990 |
26130 |
64146 |
|
Date: 2025-03-31:
| 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 |
65683 |
16972 |
350 |
457 |
51 |
6 |
0 |
0 |
| OW |
34 |
1078 |
366 |
973 |
238 |
5 |
0 |
0 |
| VODI |
1 |
152 |
95 |
1250 |
1063 |
52 |
0 |
0 |
| ODI |
0 |
26 |
15 |
257 |
1435 |
610 |
10 |
19 |
| CDI |
0 |
9 |
1 |
127 |
1008 |
4690 |
888 |
94 |
| VCDI |
0 |
3 |
0 |
4 |
391 |
5913 |
31351 |
59066 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
65690 |
16491 |
346 |
426 |
56 |
0 |
0 |
0 |
| OW |
26 |
1198 |
274 |
913 |
281 |
12 |
0 |
0 |
| VODI |
2 |
387 |
122 |
948 |
874 |
115 |
0 |
0 |
| ODI |
0 |
108 |
63 |
470 |
1075 |
731 |
20 |
8 |
| CDI |
0 |
53 |
22 |
286 |
1246 |
3743 |
1369 |
119 |
| VCDI |
0 |
3 |
0 |
25 |
654 |
6675 |
30860 |
59052 |
|
Date: 2025-04-02:
| 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 |
65811 |
16943 |
412 |
414 |
87 |
1 |
0 |
0 |
| OW |
8 |
1013 |
390 |
968 |
287 |
28 |
0 |
0 |
| VODI |
3 |
238 |
147 |
1117 |
900 |
148 |
5 |
0 |
| ODI |
1 |
45 |
34 |
275 |
1292 |
547 |
30 |
4 |
| CDI |
1 |
8 |
4 |
171 |
1013 |
3357 |
1269 |
60 |
| VCDI |
4 |
0 |
0 |
25 |
372 |
4970 |
26694 |
65647 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
65817 |
15979 |
437 |
584 |
156 |
3 |
0 |
0 |
| OW |
1 |
1351 |
234 |
720 |
381 |
49 |
2 |
0 |
| VODI |
4 |
637 |
173 |
903 |
791 |
194 |
9 |
0 |
| ODI |
1 |
214 |
97 |
401 |
1068 |
586 |
69 |
3 |
| CDI |
1 |
66 |
42 |
309 |
1115 |
3096 |
1587 |
61 |
| VCDI |
4 |
0 |
4 |
53 |
440 |
5123 |
26331 |
65647 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
65468 |
15324 |
501 |
912 |
205 |
13 |
0 |
0 |
| OW |
1 |
1525 |
162 |
642 |
448 |
121 |
0 |
0 |
| VODI |
0 |
833 |
155 |
666 |
813 |
343 |
13 |
0 |
| ODI |
0 |
278 |
65 |
346 |
836 |
879 |
154 |
13 |
| CDI |
0 |
168 |
84 |
421 |
1034 |
3111 |
2028 |
70 |
| VCDI |
0 |
32 |
24 |
133 |
551 |
5483 |
23432 |
67456 |
|
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