Validation of sea ice concentration - Full domain
Bulletin date: 2025-07-24
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-07-18:
| 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 |
109217 |
12338 |
106 |
131 |
7 |
0 |
0 |
0 |
| OW |
766 |
4126 |
959 |
1948 |
107 |
1 |
0 |
0 |
| VODI |
28 |
429 |
418 |
4720 |
1936 |
10 |
0 |
0 |
| ODI |
0 |
19 |
5 |
995 |
8222 |
1260 |
0 |
0 |
| CDI |
0 |
24 |
0 |
82 |
7505 |
30361 |
4663 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
660 |
1993 |
1704 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-20:
| 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 |
110931 |
11469 |
111 |
72 |
10 |
0 |
0 |
0 |
| OW |
574 |
4892 |
966 |
1835 |
110 |
0 |
0 |
0 |
| VODI |
17 |
688 |
454 |
4567 |
2363 |
20 |
0 |
0 |
| ODI |
0 |
40 |
19 |
1224 |
6965 |
718 |
1 |
0 |
| CDI |
0 |
18 |
3 |
118 |
6612 |
32303 |
3870 |
0 |
| VCDI |
0 |
0 |
0 |
96 |
565 |
1706 |
1406 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-22:
| 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 |
112352 |
13208 |
262 |
258 |
13 |
0 |
0 |
0 |
| OW |
211 |
4234 |
1251 |
2714 |
62 |
2 |
0 |
0 |
| VODI |
0 |
127 |
108 |
5109 |
1856 |
10 |
0 |
0 |
| ODI |
0 |
18 |
7 |
362 |
10868 |
1234 |
0 |
0 |
| CDI |
0 |
11 |
9 |
186 |
5179 |
28192 |
1493 |
0 |
| VCDI |
0 |
0 |
0 |
67 |
351 |
3835 |
1154 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-24:
| 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 |
114521 |
11970 |
233 |
139 |
3 |
0 |
0 |
0 |
| OW |
576 |
4522 |
1206 |
2020 |
75 |
8 |
0 |
0 |
| VODI |
11 |
177 |
332 |
5561 |
1682 |
34 |
0 |
0 |
| ODI |
0 |
26 |
4 |
433 |
10117 |
1210 |
7 |
0 |
| CDI |
0 |
25 |
22 |
174 |
7571 |
24933 |
771 |
0 |
| VCDI |
0 |
0 |
0 |
154 |
480 |
4137 |
1609 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
114541 |
12273 |
308 |
180 |
3 |
0 |
0 |
0 |
| OW |
552 |
4153 |
1126 |
2024 |
82 |
9 |
0 |
0 |
| VODI |
15 |
239 |
336 |
5426 |
1670 |
40 |
1 |
0 |
| ODI |
0 |
30 |
5 |
522 |
10400 |
1620 |
8 |
0 |
| CDI |
0 |
25 |
22 |
192 |
7345 |
24215 |
715 |
0 |
| VCDI |
0 |
0 |
0 |
137 |
428 |
4438 |
1663 |
0 |
|
Date: 2025-07-26:
| 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 |
115309 |
12654 |
154 |
125 |
3 |
0 |
0 |
0 |
| OW |
487 |
4762 |
1050 |
1885 |
85 |
1 |
0 |
0 |
| VODI |
0 |
431 |
422 |
5324 |
1880 |
8 |
0 |
0 |
| ODI |
0 |
25 |
3 |
610 |
8766 |
1363 |
9 |
0 |
| CDI |
0 |
40 |
27 |
181 |
8155 |
22981 |
1894 |
48 |
| VCDI |
0 |
0 |
0 |
134 |
651 |
4357 |
910 |
9 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
115380 |
12870 |
238 |
213 |
1 |
0 |
0 |
0 |
| OW |
416 |
4514 |
969 |
1805 |
99 |
2 |
0 |
0 |
| VODI |
0 |
454 |
415 |
5238 |
1707 |
10 |
0 |
0 |
| ODI |
0 |
33 |
8 |
678 |
8876 |
2294 |
12 |
0 |
| CDI |
0 |
41 |
26 |
208 |
8215 |
21043 |
1926 |
37 |
| VCDI |
0 |
0 |
0 |
117 |
642 |
5361 |
875 |
20 |
|
Date: 2025-07-28:
| 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 |
115721 |
15590 |
297 |
196 |
3 |
0 |
0 |
0 |
| OW |
189 |
3305 |
1284 |
2469 |
32 |
4 |
0 |
0 |
| VODI |
0 |
96 |
93 |
5240 |
1360 |
5 |
0 |
0 |
| ODI |
0 |
18 |
25 |
257 |
13336 |
727 |
1 |
0 |
| CDI |
0 |
3 |
7 |
197 |
3304 |
26152 |
777 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
175 |
1125 |
2505 |
247 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
115574 |
13589 |
264 |
213 |
2 |
0 |
0 |
0 |
| OW |
336 |
4741 |
915 |
1722 |
87 |
18 |
0 |
0 |
| VODI |
0 |
554 |
464 |
5199 |
1624 |
57 |
0 |
0 |
| ODI |
0 |
40 |
20 |
843 |
8033 |
3488 |
23 |
0 |
| CDI |
0 |
73 |
31 |
166 |
7689 |
17927 |
1550 |
234 |
| VCDI |
0 |
15 |
12 |
219 |
775 |
6523 |
1710 |
13 |
|
Date: 2025-07-30:
| 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 |
117283 |
14453 |
246 |
174 |
3 |
0 |
0 |
0 |
| OW |
162 |
3745 |
1160 |
1984 |
23 |
0 |
0 |
0 |
| VODI |
2 |
232 |
216 |
5475 |
1746 |
1 |
0 |
0 |
| ODI |
0 |
28 |
13 |
326 |
11220 |
3505 |
0 |
0 |
| CDI |
0 |
11 |
23 |
205 |
3989 |
23684 |
166 |
0 |
| VCDI |
0 |
0 |
0 |
17 |
159 |
3964 |
528 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
117185 |
12311 |
227 |
241 |
1 |
0 |
0 |
0 |
| OW |
259 |
5157 |
729 |
1535 |
104 |
0 |
0 |
0 |
| VODI |
1 |
807 |
620 |
5073 |
1687 |
61 |
4 |
0 |
| ODI |
2 |
64 |
27 |
995 |
7617 |
5541 |
33 |
0 |
| CDI |
0 |
93 |
23 |
125 |
6609 |
17792 |
158 |
0 |
| VCDI |
0 |
37 |
32 |
212 |
1122 |
7760 |
499 |
0 |
|
Date: 2025-08-01:
| 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 |
118517 |
13278 |
157 |
118 |
2 |
0 |
0 |
0 |
| OW |
424 |
4083 |
977 |
1775 |
12 |
0 |
0 |
0 |
| VODI |
38 |
435 |
393 |
5988 |
1501 |
6 |
0 |
0 |
| ODI |
0 |
50 |
16 |
808 |
9908 |
6241 |
115 |
0 |
| CDI |
0 |
28 |
13 |
270 |
4937 |
16277 |
3380 |
90 |
| VCDI |
0 |
0 |
0 |
1 |
120 |
2007 |
2126 |
652 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
118335 |
11432 |
196 |
371 |
11 |
0 |
0 |
0 |
| OW |
577 |
5004 |
651 |
1516 |
109 |
0 |
0 |
0 |
| VODI |
67 |
1144 |
610 |
5015 |
1292 |
100 |
3 |
0 |
| ODI |
0 |
120 |
61 |
1599 |
6875 |
6171 |
591 |
0 |
| CDI |
0 |
159 |
25 |
308 |
7598 |
13417 |
3747 |
543 |
| VCDI |
0 |
15 |
13 |
151 |
595 |
4843 |
1280 |
199 |
|
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