Validation of sea ice concentration
Bulletin date: 2025-09-04
Model vs. observations, sea ice class contingency tables
Date: 2025-08-29:
| 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 |
106924 |
23332 |
4345 |
685 |
147 |
16 |
37 |
0 |
| OW |
0 |
480 |
691 |
1046 |
341 |
51 |
78 |
0 |
| VODI |
0 |
30 |
163 |
1159 |
645 |
384 |
335 |
0 |
| ODI |
0 |
0 |
1 |
171 |
487 |
1748 |
5747 |
4 |
| CDI |
0 |
0 |
0 |
48 |
33 |
251 |
4806 |
3716 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
656 |
287 |
|
...date precedes bulletin
|
Date: 2025-09-02:
| 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 |
109583 |
19960 |
5213 |
522 |
195 |
40 |
30 |
0 |
| OW |
0 |
295 |
1287 |
1117 |
639 |
210 |
132 |
0 |
| VODI |
0 |
0 |
46 |
397 |
1114 |
1001 |
310 |
0 |
| ODI |
0 |
0 |
0 |
59 |
356 |
1967 |
5147 |
673 |
| CDI |
0 |
0 |
0 |
17 |
83 |
71 |
3258 |
1562 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
1966 |
1594 |
|
...date precedes bulletin
|
Date: 2025-09-04:
| 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 |
107082 |
22542 |
4609 |
1230 |
142 |
26 |
35 |
0 |
| OW |
0 |
87 |
772 |
1299 |
914 |
252 |
118 |
0 |
| VODI |
0 |
0 |
18 |
378 |
1024 |
1073 |
480 |
0 |
| ODI |
0 |
0 |
0 |
70 |
253 |
1408 |
5947 |
714 |
| CDI |
0 |
0 |
0 |
0 |
40 |
169 |
2454 |
1153 |
| VCDI |
0 |
0 |
0 |
0 |
16 |
7 |
2378 |
2154 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
107082 |
22511 |
4521 |
1207 |
128 |
28 |
33 |
0 |
| OW |
0 |
118 |
855 |
1353 |
975 |
266 |
103 |
0 |
| VODI |
0 |
0 |
23 |
343 |
991 |
986 |
490 |
0 |
| ODI |
0 |
0 |
0 |
67 |
230 |
1461 |
5736 |
818 |
| CDI |
0 |
0 |
0 |
7 |
58 |
189 |
2746 |
1203 |
| VCDI |
0 |
0 |
0 |
0 |
7 |
5 |
2304 |
2000 |
|
Date: 2025-09-08:
| 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 |
115432 |
14300 |
6431 |
480 |
68 |
32 |
15 |
0 |
| OW |
0 |
8 |
1255 |
817 |
440 |
156 |
35 |
0 |
| VODI |
0 |
0 |
64 |
466 |
1038 |
799 |
351 |
2 |
| ODI |
0 |
0 |
0 |
48 |
201 |
882 |
3256 |
211 |
| CDI |
0 |
0 |
0 |
3 |
8 |
154 |
3323 |
3644 |
| VCDI |
0 |
0 |
0 |
0 |
18 |
24 |
1740 |
3143 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
115432 |
14279 |
5905 |
340 |
90 |
41 |
17 |
0 |
| OW |
0 |
29 |
1530 |
910 |
449 |
217 |
23 |
0 |
| VODI |
0 |
0 |
315 |
501 |
891 |
935 |
299 |
3 |
| ODI |
0 |
0 |
0 |
58 |
317 |
771 |
4198 |
636 |
| CDI |
0 |
0 |
0 |
5 |
25 |
73 |
2612 |
2849 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
10 |
1571 |
3512 |
|
Date: 2025-09-10:
| 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 |
109827 |
19704 |
5900 |
653 |
109 |
19 |
16 |
0 |
| OW |
0 |
116 |
967 |
1013 |
367 |
175 |
36 |
0 |
| VODI |
0 |
0 |
66 |
591 |
1210 |
966 |
125 |
0 |
| ODI |
0 |
0 |
0 |
52 |
352 |
1361 |
2648 |
0 |
| CDI |
0 |
0 |
0 |
4 |
49 |
192 |
4327 |
2315 |
| VCDI |
0 |
0 |
0 |
0 |
11 |
47 |
2829 |
2797 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
109827 |
19336 |
5396 |
505 |
78 |
40 |
19 |
0 |
| OW |
0 |
431 |
1204 |
955 |
367 |
208 |
19 |
0 |
| VODI |
0 |
53 |
333 |
749 |
1074 |
840 |
211 |
0 |
| ODI |
0 |
0 |
0 |
99 |
537 |
1408 |
3217 |
81 |
| CDI |
0 |
0 |
0 |
5 |
38 |
171 |
3778 |
2026 |
| VCDI |
0 |
0 |
0 |
0 |
4 |
93 |
2737 |
3005 |
|
Date: 2025-09-12:
| 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 |
109376 |
20194 |
5256 |
717 |
57 |
20 |
15 |
0 |
| OW |
0 |
293 |
910 |
706 |
480 |
254 |
16 |
0 |
| VODI |
0 |
0 |
74 |
498 |
1316 |
1171 |
86 |
0 |
| ODI |
0 |
0 |
0 |
48 |
317 |
1949 |
1334 |
0 |
| CDI |
0 |
0 |
0 |
3 |
45 |
428 |
4856 |
788 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
70 |
3766 |
3801 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
109376 |
19909 |
4848 |
520 |
53 |
22 |
16 |
0 |
| OW |
0 |
568 |
1058 |
811 |
453 |
293 |
18 |
0 |
| VODI |
0 |
10 |
333 |
606 |
1221 |
1093 |
135 |
0 |
| ODI |
0 |
0 |
1 |
32 |
438 |
1901 |
1320 |
0 |
| CDI |
0 |
0 |
0 |
3 |
49 |
484 |
5045 |
620 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
99 |
3539 |
3969 |
|
Generated by /metno/routine/sms/V3/SIconcentrationValidation5/SICchartWebPage5.sh Fri Sep 19 03:07:39 UTC 2025 on arcval2