Validation of sea ice concentration - Full domain
Bulletin date: 2025-07-17
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-07-11:
| 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 |
103364 |
15390 |
83 |
194 |
21 |
0 |
0 |
0 |
| OW |
199 |
3685 |
710 |
1573 |
144 |
5 |
0 |
0 |
| VODI |
8 |
714 |
378 |
3830 |
1775 |
36 |
0 |
0 |
| ODI |
0 |
34 |
33 |
1066 |
6367 |
1278 |
17 |
0 |
| CDI |
0 |
1 |
10 |
269 |
10918 |
23697 |
1353 |
0 |
| VCDI |
0 |
0 |
0 |
15 |
1615 |
11248 |
4713 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-13:
| 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 |
104153 |
14530 |
77 |
125 |
14 |
1 |
0 |
0 |
| OW |
266 |
4518 |
745 |
1177 |
124 |
16 |
0 |
0 |
| VODI |
4 |
1017 |
555 |
4019 |
1602 |
77 |
4 |
0 |
| ODI |
0 |
71 |
64 |
1620 |
5780 |
1273 |
39 |
0 |
| CDI |
0 |
20 |
21 |
381 |
7528 |
29885 |
2287 |
10 |
| VCDI |
0 |
0 |
0 |
18 |
942 |
9946 |
1822 |
12 |
|
...date precedes bulletin
|
Date: 2025-07-15:
| 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 |
106888 |
13780 |
165 |
208 |
11 |
0 |
0 |
0 |
| OW |
450 |
3824 |
1090 |
2211 |
105 |
2 |
0 |
0 |
| VODI |
2 |
231 |
256 |
4667 |
1634 |
6 |
0 |
0 |
| ODI |
0 |
3 |
1 |
678 |
10119 |
534 |
0 |
0 |
| CDI |
0 |
1 |
0 |
31 |
6760 |
33147 |
1634 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
510 |
3712 |
2034 |
49 |
|
...date precedes bulletin
|
Date: 2025-07-17:
| 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 |
108231 |
12951 |
103 |
167 |
11 |
0 |
0 |
0 |
| OW |
583 |
4047 |
998 |
2048 |
132 |
0 |
0 |
0 |
| VODI |
7 |
372 |
347 |
4816 |
1780 |
13 |
0 |
0 |
| ODI |
0 |
17 |
12 |
786 |
9967 |
270 |
0 |
0 |
| CDI |
0 |
25 |
0 |
51 |
7220 |
32160 |
2129 |
0 |
| VCDI |
0 |
0 |
0 |
23 |
671 |
2880 |
1926 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
108260 |
13301 |
117 |
200 |
9 |
0 |
0 |
0 |
| OW |
545 |
3689 |
999 |
2034 |
160 |
3 |
0 |
0 |
| VODI |
16 |
378 |
330 |
4712 |
1839 |
14 |
0 |
0 |
| ODI |
0 |
17 |
13 |
858 |
9725 |
604 |
0 |
0 |
| CDI |
0 |
27 |
1 |
66 |
7370 |
31895 |
2070 |
0 |
| VCDI |
0 |
0 |
0 |
21 |
678 |
2807 |
1985 |
0 |
|
Date: 2025-07-19:
| 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 |
109639 |
12268 |
104 |
83 |
6 |
0 |
0 |
0 |
| OW |
702 |
4605 |
961 |
1752 |
109 |
0 |
0 |
0 |
| VODI |
30 |
627 |
523 |
4497 |
2151 |
15 |
0 |
0 |
| ODI |
0 |
30 |
10 |
1223 |
7466 |
919 |
0 |
0 |
| CDI |
0 |
22 |
5 |
103 |
6340 |
34354 |
2064 |
0 |
| VCDI |
0 |
0 |
0 |
59 |
527 |
3190 |
359 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
109663 |
12556 |
132 |
143 |
10 |
0 |
0 |
0 |
| OW |
653 |
4284 |
928 |
1746 |
122 |
0 |
0 |
0 |
| VODI |
55 |
652 |
514 |
4315 |
2203 |
29 |
0 |
0 |
| ODI |
0 |
35 |
21 |
1321 |
7543 |
1547 |
0 |
0 |
| CDI |
0 |
25 |
8 |
131 |
6193 |
33675 |
2040 |
0 |
| VCDI |
0 |
0 |
0 |
61 |
528 |
3227 |
383 |
0 |
|
Date: 2025-07-21:
| 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 |
111587 |
13548 |
246 |
198 |
12 |
0 |
0 |
0 |
| OW |
174 |
4046 |
1259 |
2963 |
55 |
1 |
0 |
0 |
| VODI |
0 |
63 |
75 |
4563 |
2305 |
8 |
0 |
0 |
| ODI |
0 |
13 |
5 |
154 |
11803 |
1149 |
0 |
0 |
| CDI |
0 |
3 |
1 |
154 |
2713 |
32129 |
857 |
0 |
| VCDI |
0 |
0 |
0 |
15 |
332 |
1081 |
3231 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
111247 |
11911 |
128 |
158 |
18 |
0 |
0 |
0 |
| OW |
491 |
4878 |
902 |
1860 |
106 |
4 |
0 |
0 |
| VODI |
23 |
781 |
479 |
4392 |
2408 |
37 |
0 |
0 |
| ODI |
0 |
64 |
59 |
1346 |
6781 |
1331 |
6 |
0 |
| CDI |
0 |
39 |
18 |
146 |
7385 |
30577 |
2764 |
0 |
| VCDI |
0 |
0 |
0 |
145 |
522 |
2419 |
1318 |
0 |
|
Date: 2025-07-23:
| 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 |
112031 |
13893 |
267 |
186 |
7 |
0 |
0 |
0 |
| OW |
130 |
4589 |
1223 |
2461 |
55 |
0 |
0 |
0 |
| VODI |
0 |
150 |
164 |
5408 |
1811 |
9 |
0 |
0 |
| ODI |
0 |
22 |
3 |
364 |
10694 |
1082 |
0 |
0 |
| CDI |
0 |
10 |
8 |
177 |
6867 |
26193 |
746 |
0 |
| VCDI |
0 |
0 |
0 |
71 |
423 |
4092 |
1607 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
111800 |
11698 |
159 |
142 |
13 |
0 |
0 |
0 |
| OW |
360 |
5823 |
876 |
1705 |
89 |
4 |
0 |
0 |
| VODI |
1 |
989 |
540 |
4874 |
1897 |
36 |
0 |
0 |
| ODI |
0 |
101 |
72 |
1588 |
6880 |
1362 |
28 |
0 |
| CDI |
0 |
41 |
11 |
163 |
10368 |
25873 |
1159 |
0 |
| VCDI |
0 |
12 |
7 |
195 |
610 |
4101 |
1166 |
0 |
|
Date: 2025-07-25:
| 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 |
115045 |
12244 |
158 |
138 |
1 |
0 |
0 |
0 |
| OW |
555 |
4711 |
1039 |
1960 |
65 |
0 |
0 |
0 |
| VODI |
15 |
346 |
405 |
5361 |
1764 |
10 |
0 |
0 |
| ODI |
0 |
25 |
4 |
606 |
9101 |
1527 |
4 |
0 |
| CDI |
0 |
31 |
22 |
160 |
7782 |
25499 |
279 |
0 |
| VCDI |
0 |
0 |
0 |
188 |
763 |
4650 |
285 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
114507 |
9855 |
138 |
189 |
15 |
0 |
0 |
0 |
| OW |
1098 |
5507 |
702 |
1531 |
91 |
5 |
0 |
0 |
| VODI |
10 |
1595 |
579 |
4226 |
1866 |
67 |
2 |
0 |
| ODI |
0 |
313 |
175 |
1916 |
5601 |
2154 |
7 |
0 |
| CDI |
0 |
50 |
12 |
282 |
10724 |
24233 |
383 |
0 |
| VCDI |
0 |
37 |
22 |
269 |
1179 |
5227 |
176 |
0 |
|
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