Validation of sea ice concentration - Full domain
Bulletin date: 2025-10-16
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-10-10:
| 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 |
111670 |
13101 |
211 |
213 |
40 |
0 |
0 |
0 |
| OW |
1764 |
1534 |
364 |
644 |
270 |
13 |
0 |
0 |
| VODI |
2258 |
423 |
191 |
722 |
860 |
260 |
2 |
0 |
| ODI |
0 |
194 |
40 |
242 |
685 |
718 |
117 |
0 |
| CDI |
0 |
193 |
102 |
255 |
813 |
2098 |
1107 |
0 |
| VCDI |
0 |
1 |
7 |
32 |
146 |
12152 |
25341 |
2027 |
|
...date precedes bulletin
|
Date: 2025-10-12:
| 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 |
109596 |
13790 |
297 |
334 |
16 |
2 |
0 |
0 |
| OW |
1745 |
1676 |
358 |
681 |
245 |
82 |
0 |
0 |
| VODI |
2285 |
429 |
267 |
757 |
729 |
331 |
26 |
0 |
| ODI |
0 |
160 |
47 |
321 |
678 |
688 |
211 |
0 |
| CDI |
0 |
204 |
47 |
202 |
874 |
2033 |
1005 |
0 |
| VCDI |
0 |
6 |
4 |
16 |
175 |
8099 |
29635 |
2759 |
|
...date precedes bulletin
|
Date: 2025-10-14:
| 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 |
108660 |
14521 |
252 |
189 |
6 |
0 |
0 |
0 |
| OW |
1690 |
1777 |
606 |
861 |
124 |
3 |
0 |
0 |
| VODI |
2319 |
108 |
253 |
874 |
699 |
54 |
0 |
0 |
| ODI |
0 |
1 |
34 |
451 |
887 |
416 |
15 |
0 |
| CDI |
0 |
0 |
1 |
263 |
850 |
2858 |
1138 |
0 |
| VCDI |
0 |
0 |
3 |
13 |
248 |
6906 |
25271 |
8459 |
|
...date precedes bulletin
|
Date: 2025-10-16:
| 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 |
107764 |
13723 |
405 |
383 |
117 |
1 |
0 |
0 |
| OW |
1719 |
1712 |
502 |
939 |
308 |
16 |
0 |
0 |
| VODI |
2227 |
270 |
190 |
870 |
1131 |
186 |
0 |
0 |
| ODI |
0 |
99 |
35 |
219 |
889 |
649 |
49 |
0 |
| CDI |
0 |
27 |
71 |
255 |
708 |
2417 |
1123 |
0 |
| VCDI |
0 |
0 |
0 |
32 |
187 |
10361 |
24181 |
7045 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
107762 |
14040 |
453 |
495 |
166 |
3 |
0 |
0 |
| OW |
1722 |
1415 |
464 |
846 |
320 |
21 |
0 |
0 |
| VODI |
2226 |
249 |
190 |
865 |
1075 |
218 |
0 |
0 |
| ODI |
0 |
93 |
24 |
217 |
931 |
671 |
79 |
0 |
| CDI |
0 |
34 |
72 |
256 |
659 |
2363 |
1192 |
0 |
| VCDI |
0 |
0 |
0 |
19 |
189 |
10354 |
24082 |
7045 |
|
Date: 2025-10-18:
| 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 |
106290 |
13771 |
381 |
453 |
147 |
13 |
0 |
0 |
| OW |
1660 |
1889 |
401 |
914 |
389 |
103 |
0 |
0 |
| VODI |
2376 |
390 |
223 |
810 |
962 |
518 |
2 |
0 |
| ODI |
0 |
77 |
54 |
252 |
785 |
903 |
114 |
0 |
| CDI |
0 |
53 |
44 |
273 |
652 |
2129 |
939 |
0 |
| VCDI |
0 |
0 |
0 |
11 |
217 |
10795 |
24563 |
7257 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
106291 |
14072 |
419 |
573 |
181 |
29 |
0 |
0 |
| OW |
1661 |
1550 |
372 |
794 |
436 |
127 |
0 |
0 |
| VODI |
2374 |
433 |
199 |
789 |
894 |
502 |
15 |
0 |
| ODI |
0 |
80 |
67 |
261 |
831 |
908 |
139 |
0 |
| CDI |
0 |
45 |
46 |
284 |
587 |
2192 |
1035 |
0 |
| VCDI |
0 |
0 |
0 |
12 |
223 |
10703 |
24429 |
7257 |
|
Date: 2025-10-20:
| 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 |
105214 |
13697 |
471 |
446 |
59 |
2 |
0 |
0 |
| OW |
1611 |
1291 |
749 |
936 |
256 |
9 |
0 |
0 |
| VODI |
2433 |
20 |
121 |
1561 |
789 |
140 |
5 |
0 |
| ODI |
0 |
0 |
3 |
242 |
1371 |
432 |
157 |
0 |
| CDI |
0 |
0 |
0 |
63 |
938 |
3871 |
407 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
84 |
10649 |
20114 |
12666 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
105209 |
12987 |
547 |
810 |
319 |
39 |
0 |
0 |
| OW |
1630 |
1530 |
428 |
831 |
628 |
232 |
15 |
0 |
| VODI |
2419 |
429 |
280 |
903 |
895 |
816 |
82 |
0 |
| ODI |
0 |
60 |
65 |
342 |
763 |
939 |
226 |
0 |
| CDI |
0 |
2 |
24 |
275 |
521 |
1984 |
1116 |
0 |
| VCDI |
0 |
0 |
0 |
90 |
371 |
11093 |
19244 |
12666 |
|
Date: 2025-10-22:
| 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 |
104655 |
11986 |
790 |
878 |
230 |
23 |
0 |
0 |
| OW |
1566 |
697 |
409 |
1212 |
686 |
134 |
0 |
0 |
| VODI |
2466 |
134 |
140 |
1193 |
1057 |
396 |
6 |
0 |
| ODI |
0 |
1 |
8 |
344 |
923 |
730 |
109 |
0 |
| CDI |
0 |
0 |
0 |
111 |
917 |
2745 |
808 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
95 |
9525 |
26242 |
9589 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
104576 |
11152 |
668 |
959 |
592 |
171 |
0 |
0 |
| OW |
1657 |
1134 |
357 |
768 |
693 |
538 |
44 |
0 |
| VODI |
2454 |
489 |
277 |
1065 |
889 |
830 |
279 |
0 |
| ODI |
0 |
40 |
40 |
588 |
717 |
807 |
428 |
0 |
| CDI |
0 |
3 |
5 |
229 |
630 |
1653 |
1013 |
0 |
| VCDI |
0 |
0 |
0 |
134 |
387 |
9554 |
25401 |
9589 |
|
Date: 2025-10-24:
| 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 |
103334 |
10973 |
642 |
1043 |
270 |
20 |
0 |
0 |
| OW |
1460 |
562 |
340 |
1071 |
761 |
276 |
3 |
0 |
| VODI |
2656 |
155 |
80 |
861 |
1337 |
809 |
39 |
0 |
| ODI |
0 |
31 |
41 |
181 |
1101 |
843 |
160 |
0 |
| CDI |
0 |
1 |
10 |
92 |
1021 |
2144 |
840 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
217 |
9744 |
24137 |
13551 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
103348 |
10495 |
542 |
851 |
450 |
212 |
3 |
0 |
| OW |
1465 |
958 |
351 |
795 |
657 |
633 |
67 |
0 |
| VODI |
2637 |
223 |
189 |
1051 |
1092 |
993 |
364 |
0 |
| ODI |
0 |
36 |
26 |
472 |
1225 |
1004 |
535 |
0 |
| CDI |
0 |
10 |
5 |
75 |
713 |
1579 |
1153 |
0 |
| VCDI |
0 |
0 |
0 |
8 |
570 |
9415 |
23057 |
13551 |
|
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