Validation of sea ice concentration - Full domain
Bulletin date: 2025-06-26
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-06-20:
| 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 |
87751 |
14702 |
131 |
147 |
22 |
0 |
0 |
0 |
| OW |
286 |
5211 |
851 |
859 |
100 |
2 |
0 |
0 |
| VODI |
29 |
1077 |
816 |
4111 |
1049 |
82 |
9 |
0 |
| ODI |
2 |
20 |
58 |
1402 |
4049 |
711 |
48 |
1 |
| CDI |
0 |
1 |
4 |
281 |
4332 |
8189 |
2233 |
43 |
| VCDI |
0 |
0 |
0 |
3 |
1804 |
14416 |
23538 |
16373 |
|
...date precedes bulletin
|
Date: 2025-06-22:
| 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 |
88468 |
14425 |
99 |
119 |
28 |
0 |
0 |
0 |
| OW |
527 |
5221 |
728 |
1043 |
77 |
6 |
0 |
0 |
| VODI |
39 |
1432 |
775 |
3679 |
1051 |
100 |
15 |
0 |
| ODI |
4 |
27 |
71 |
1532 |
4043 |
879 |
27 |
0 |
| CDI |
0 |
0 |
0 |
438 |
4763 |
8841 |
1701 |
321 |
| VCDI |
0 |
0 |
0 |
4 |
2592 |
15581 |
15351 |
20736 |
|
...date precedes bulletin
|
Date: 2025-06-24:
| 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 |
89854 |
16308 |
148 |
180 |
22 |
0 |
0 |
0 |
| OW |
198 |
4452 |
1207 |
1221 |
58 |
8 |
1 |
0 |
| VODI |
10 |
195 |
261 |
4495 |
1341 |
88 |
11 |
1 |
| ODI |
3 |
1 |
1 |
727 |
6026 |
720 |
42 |
0 |
| CDI |
0 |
0 |
0 |
171 |
3758 |
14191 |
1651 |
11 |
| VCDI |
0 |
0 |
0 |
1 |
4478 |
11825 |
21232 |
9846 |
|
...date precedes bulletin
|
Date: 2025-06-26:
| 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 |
91231 |
15926 |
135 |
171 |
18 |
0 |
0 |
0 |
| OW |
180 |
4794 |
952 |
1038 |
81 |
13 |
0 |
0 |
| VODI |
5 |
722 |
492 |
3767 |
1354 |
187 |
3 |
0 |
| ODI |
3 |
26 |
17 |
1825 |
4160 |
1210 |
55 |
0 |
| CDI |
0 |
40 |
2 |
459 |
3727 |
15182 |
2165 |
21 |
| VCDI |
0 |
0 |
0 |
0 |
1903 |
18501 |
16080 |
8298 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
91240 |
16297 |
148 |
196 |
22 |
0 |
0 |
0 |
| OW |
172 |
4415 |
902 |
975 |
84 |
18 |
0 |
0 |
| VODI |
4 |
726 |
518 |
3811 |
1302 |
186 |
2 |
0 |
| ODI |
3 |
30 |
28 |
1712 |
4153 |
1328 |
62 |
0 |
| CDI |
0 |
40 |
2 |
565 |
3744 |
14950 |
2704 |
62 |
| VCDI |
0 |
0 |
0 |
1 |
1938 |
18611 |
15535 |
8257 |
|
Date: 2025-06-28:
| 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 |
92877 |
15559 |
129 |
179 |
20 |
0 |
0 |
0 |
| OW |
306 |
5038 |
773 |
868 |
126 |
25 |
0 |
0 |
| VODI |
36 |
916 |
518 |
3526 |
1317 |
219 |
1 |
0 |
| ODI |
9 |
43 |
56 |
2370 |
3296 |
1194 |
24 |
5 |
| CDI |
1 |
36 |
5 |
606 |
4495 |
13993 |
1426 |
20 |
| VCDI |
0 |
0 |
0 |
0 |
1379 |
19935 |
17395 |
6022 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
92862 |
15785 |
154 |
212 |
33 |
0 |
0 |
0 |
| OW |
313 |
4760 |
741 |
838 |
112 |
25 |
0 |
0 |
| VODI |
43 |
956 |
524 |
3477 |
1219 |
239 |
1 |
0 |
| ODI |
9 |
55 |
57 |
2220 |
3655 |
1354 |
38 |
6 |
| CDI |
2 |
36 |
5 |
802 |
4086 |
13824 |
1677 |
31 |
| VCDI |
0 |
0 |
0 |
0 |
1528 |
19924 |
17130 |
6010 |
|
Date: 2025-06-30:
| 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 |
94178 |
17545 |
150 |
248 |
18 |
0 |
0 |
0 |
| OW |
249 |
4004 |
1176 |
2573 |
133 |
4 |
0 |
0 |
| VODI |
15 |
106 |
77 |
4128 |
1572 |
57 |
1 |
0 |
| ODI |
0 |
20 |
4 |
349 |
5340 |
890 |
0 |
1 |
| CDI |
0 |
2 |
0 |
21 |
3910 |
19049 |
420 |
15 |
| VCDI |
0 |
0 |
0 |
0 |
1128 |
14849 |
15502 |
7009 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
93914 |
15668 |
130 |
242 |
22 |
0 |
0 |
0 |
| OW |
476 |
4650 |
601 |
879 |
160 |
24 |
0 |
0 |
| VODI |
45 |
1149 |
532 |
3252 |
1370 |
291 |
6 |
0 |
| ODI |
7 |
163 |
128 |
2216 |
3923 |
1355 |
37 |
9 |
| CDI |
0 |
47 |
16 |
724 |
4864 |
13859 |
1431 |
18 |
| VCDI |
0 |
0 |
0 |
6 |
1762 |
19320 |
14449 |
6998 |
|
Date: 2025-07-02:
| 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 |
95270 |
17133 |
178 |
187 |
12 |
0 |
0 |
0 |
| OW |
330 |
4568 |
1200 |
1968 |
156 |
4 |
0 |
0 |
| VODI |
20 |
289 |
188 |
3578 |
1499 |
83 |
1 |
0 |
| ODI |
0 |
24 |
4 |
669 |
5958 |
556 |
15 |
0 |
| CDI |
0 |
2 |
0 |
76 |
6499 |
16198 |
1137 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
883 |
16818 |
15185 |
4055 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
95058 |
15101 |
125 |
113 |
12 |
0 |
0 |
0 |
| OW |
531 |
4607 |
599 |
818 |
243 |
28 |
0 |
0 |
| VODI |
30 |
1688 |
644 |
2950 |
1298 |
311 |
14 |
0 |
| ODI |
1 |
549 |
175 |
1905 |
4594 |
1330 |
13 |
0 |
| CDI |
0 |
71 |
27 |
664 |
7262 |
11310 |
1910 |
0 |
| VCDI |
0 |
0 |
0 |
28 |
1598 |
20680 |
14401 |
4055 |
|
Date: 2025-07-04:
| 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 |
104683 |
6819 |
1928 |
46 |
12 |
1 |
0 |
0 |
| OW |
1978 |
2598 |
2169 |
1601 |
56 |
13 |
0 |
0 |
| VODI |
143 |
213 |
3088 |
1597 |
471 |
50 |
1 |
1 |
| ODI |
8 |
50 |
4397 |
1478 |
1818 |
470 |
5 |
12 |
| CDI |
2 |
0 |
10534 |
2956 |
3447 |
3844 |
190 |
17 |
| VCDI |
0 |
0 |
6286 |
4848 |
5002 |
13659 |
6098 |
2154 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
103321 |
6085 |
1552 |
42 |
5 |
0 |
0 |
0 |
| OW |
2782 |
2006 |
1753 |
482 |
17 |
1 |
0 |
0 |
| VODI |
554 |
1032 |
3201 |
1987 |
316 |
22 |
1 |
2 |
| ODI |
141 |
523 |
4823 |
1714 |
1342 |
263 |
0 |
7 |
| CDI |
16 |
34 |
10202 |
1855 |
3443 |
4393 |
456 |
38 |
| VCDI |
0 |
0 |
6871 |
6446 |
5683 |
13358 |
5837 |
2137 |
|
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