Validation of sea ice concentration - Full domain
Bulletin date: 2025-11-20
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-11-14:
| 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 |
108258 |
9769 |
340 |
731 |
38 |
0 |
0 |
0 |
| OW |
294 |
1310 |
231 |
653 |
338 |
7 |
0 |
0 |
| VODI |
50 |
1095 |
264 |
949 |
741 |
193 |
0 |
0 |
| ODI |
3 |
262 |
49 |
468 |
779 |
611 |
0 |
0 |
| CDI |
0 |
14 |
6 |
135 |
792 |
1971 |
161 |
8 |
| VCDI |
0 |
18 |
1 |
40 |
301 |
6094 |
23105 |
34664 |
|
...date precedes bulletin
|
Date: 2025-11-16:
| 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 |
106632 |
11384 |
413 |
506 |
25 |
0 |
0 |
0 |
| OW |
358 |
1185 |
315 |
890 |
304 |
34 |
0 |
0 |
| VODI |
187 |
386 |
205 |
984 |
908 |
124 |
0 |
0 |
| ODI |
1 |
75 |
27 |
499 |
712 |
378 |
0 |
0 |
| CDI |
1 |
21 |
12 |
236 |
1400 |
1135 |
111 |
2 |
| VCDI |
0 |
15 |
11 |
73 |
754 |
9249 |
22462 |
32729 |
|
...date precedes bulletin
|
Date: 2025-11-18:
| 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 |
106036 |
11699 |
458 |
535 |
46 |
2 |
0 |
0 |
| OW |
218 |
850 |
347 |
1027 |
160 |
5 |
0 |
0 |
| VODI |
8 |
256 |
105 |
938 |
893 |
65 |
0 |
0 |
| ODI |
0 |
66 |
29 |
405 |
942 |
300 |
2 |
1 |
| CDI |
2 |
12 |
2 |
104 |
1141 |
2031 |
99 |
23 |
| VCDI |
14 |
0 |
0 |
25 |
530 |
8855 |
24923 |
31589 |
|
...date precedes bulletin
|
Date: 2025-11-20:
| 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 |
104953 |
11582 |
310 |
428 |
24 |
0 |
0 |
0 |
| OW |
240 |
1223 |
290 |
694 |
142 |
2 |
0 |
0 |
| VODI |
9 |
510 |
211 |
1020 |
648 |
65 |
0 |
0 |
| ODI |
1 |
140 |
27 |
512 |
987 |
311 |
1 |
0 |
| CDI |
5 |
32 |
14 |
192 |
1206 |
1503 |
170 |
2 |
| VCDI |
10 |
13 |
11 |
61 |
491 |
6675 |
26122 |
33906 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
105005 |
11578 |
332 |
481 |
23 |
0 |
0 |
0 |
| OW |
184 |
1215 |
269 |
681 |
142 |
0 |
0 |
0 |
| VODI |
13 |
528 |
195 |
997 |
666 |
70 |
0 |
0 |
| ODI |
1 |
134 |
42 |
498 |
1011 |
293 |
0 |
0 |
| CDI |
5 |
30 |
14 |
195 |
1205 |
1528 |
206 |
1 |
| VCDI |
10 |
15 |
11 |
55 |
451 |
6665 |
26087 |
33907 |
|
Date: 2025-11-22:
| 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 |
104111 |
11055 |
349 |
390 |
33 |
0 |
0 |
0 |
| OW |
98 |
1067 |
252 |
705 |
126 |
5 |
0 |
0 |
| VODI |
4 |
971 |
193 |
1113 |
679 |
87 |
0 |
0 |
| ODI |
0 |
72 |
41 |
623 |
956 |
338 |
6 |
1 |
| CDI |
0 |
15 |
5 |
234 |
1217 |
1560 |
181 |
11 |
| VCDI |
0 |
6 |
3 |
131 |
558 |
5351 |
22790 |
39406 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
104125 |
11116 |
408 |
414 |
64 |
2 |
0 |
0 |
| OW |
83 |
1003 |
205 |
770 |
102 |
7 |
0 |
0 |
| VODI |
5 |
961 |
172 |
1065 |
666 |
83 |
0 |
0 |
| ODI |
0 |
88 |
50 |
570 |
986 |
377 |
3 |
1 |
| CDI |
0 |
12 |
6 |
251 |
1212 |
1506 |
143 |
10 |
| VCDI |
0 |
6 |
2 |
126 |
539 |
5366 |
22831 |
39407 |
|
Date: 2025-11-24:
| 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 |
102260 |
12066 |
386 |
534 |
69 |
0 |
0 |
0 |
| OW |
51 |
1394 |
428 |
863 |
111 |
9 |
0 |
0 |
| VODI |
3 |
269 |
189 |
1521 |
376 |
33 |
0 |
0 |
| ODI |
0 |
11 |
12 |
413 |
1144 |
186 |
0 |
0 |
| CDI |
0 |
3 |
0 |
110 |
1575 |
1715 |
75 |
16 |
| VCDI |
0 |
0 |
0 |
35 |
359 |
5338 |
20269 |
42920 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
102210 |
11919 |
416 |
700 |
188 |
28 |
0 |
0 |
| OW |
85 |
941 |
179 |
617 |
169 |
38 |
0 |
0 |
| VODI |
19 |
743 |
311 |
1073 |
511 |
147 |
6 |
0 |
| ODI |
0 |
125 |
97 |
711 |
871 |
305 |
18 |
0 |
| CDI |
0 |
13 |
12 |
263 |
1359 |
1354 |
116 |
13 |
| VCDI |
0 |
2 |
0 |
112 |
536 |
5409 |
20204 |
42923 |
|
Date: 2025-11-26:
| 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 |
101294 |
12145 |
376 |
552 |
48 |
13 |
0 |
0 |
| OW |
17 |
1208 |
350 |
950 |
116 |
24 |
0 |
0 |
| VODI |
3 |
426 |
224 |
1587 |
511 |
32 |
5 |
0 |
| ODI |
0 |
20 |
36 |
718 |
915 |
118 |
21 |
0 |
| CDI |
0 |
1 |
0 |
203 |
1333 |
1308 |
141 |
24 |
| VCDI |
0 |
0 |
0 |
27 |
568 |
5275 |
21023 |
43131 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
101287 |
12020 |
401 |
678 |
104 |
53 |
1 |
0 |
| OW |
23 |
1001 |
230 |
822 |
221 |
12 |
13 |
0 |
| VODI |
4 |
612 |
195 |
1073 |
536 |
64 |
23 |
0 |
| ODI |
0 |
141 |
128 |
1026 |
780 |
248 |
31 |
0 |
| CDI |
0 |
22 |
31 |
328 |
1157 |
1204 |
213 |
16 |
| VCDI |
0 |
4 |
1 |
110 |
693 |
5189 |
20909 |
43139 |
|
Date: 2025-11-28:
| 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 |
99897 |
12499 |
447 |
482 |
33 |
0 |
0 |
0 |
| OW |
116 |
1367 |
311 |
894 |
207 |
17 |
0 |
0 |
| VODI |
16 |
690 |
272 |
1248 |
606 |
171 |
0 |
0 |
| ODI |
0 |
116 |
69 |
795 |
849 |
232 |
2 |
0 |
| CDI |
0 |
13 |
47 |
281 |
1240 |
829 |
65 |
4 |
| VCDI |
0 |
1 |
1 |
138 |
792 |
6587 |
22779 |
40630 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
99847 |
12577 |
471 |
703 |
117 |
4 |
0 |
0 |
| OW |
124 |
1032 |
256 |
853 |
348 |
57 |
0 |
0 |
| VODI |
58 |
664 |
211 |
1024 |
587 |
211 |
0 |
0 |
| ODI |
0 |
274 |
89 |
653 |
860 |
268 |
14 |
0 |
| CDI |
0 |
129 |
75 |
352 |
959 |
1055 |
189 |
15 |
| VCDI |
0 |
10 |
45 |
253 |
856 |
6241 |
22643 |
40619 |
|
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