Validation of sea ice concentration - Full domain
Bulletin date: 2025-05-15
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-05-09:
| 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 |
68445 |
14716 |
128 |
192 |
30 |
3 |
0 |
5 |
| OW |
105 |
2916 |
575 |
887 |
186 |
29 |
2 |
22 |
| VODI |
11 |
427 |
450 |
3112 |
1528 |
129 |
23 |
63 |
| ODI |
0 |
38 |
29 |
837 |
3634 |
619 |
83 |
107 |
| CDI |
0 |
13 |
27 |
438 |
3674 |
6140 |
1940 |
164 |
| VCDI |
0 |
1 |
1 |
233 |
1697 |
6967 |
25604 |
48513 |
|
...date precedes bulletin
|
Date: 2025-05-11:
| 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 |
69562 |
13697 |
132 |
163 |
19 |
0 |
0 |
26 |
| OW |
88 |
3374 |
546 |
893 |
185 |
22 |
7 |
52 |
| VODI |
0 |
593 |
524 |
3187 |
1509 |
168 |
56 |
86 |
| ODI |
0 |
65 |
100 |
1070 |
3234 |
863 |
170 |
72 |
| CDI |
0 |
123 |
124 |
550 |
3936 |
5777 |
2482 |
227 |
| VCDI |
0 |
6 |
17 |
299 |
1245 |
7243 |
27550 |
44701 |
|
...date precedes bulletin
|
Date: 2025-05-13:
| 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 |
70500 |
14610 |
114 |
112 |
5 |
2 |
0 |
7 |
| OW |
27 |
3297 |
796 |
925 |
82 |
17 |
2 |
26 |
| VODI |
0 |
410 |
433 |
3912 |
1226 |
81 |
14 |
74 |
| ODI |
0 |
36 |
35 |
903 |
4828 |
534 |
74 |
86 |
| CDI |
0 |
0 |
4 |
267 |
3521 |
7677 |
1200 |
190 |
| VCDI |
0 |
0 |
1 |
134 |
1049 |
7502 |
34109 |
35921 |
|
...date precedes bulletin
|
Date: 2025-05-15:
| 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 |
70888 |
14492 |
159 |
160 |
15 |
0 |
0 |
17 |
| OW |
29 |
3666 |
830 |
868 |
167 |
5 |
1 |
35 |
| VODI |
0 |
524 |
621 |
3658 |
1480 |
70 |
46 |
78 |
| ODI |
0 |
64 |
72 |
1247 |
3792 |
511 |
223 |
74 |
| CDI |
0 |
4 |
9 |
412 |
3899 |
7509 |
2666 |
198 |
| VCDI |
0 |
0 |
0 |
40 |
455 |
5846 |
39628 |
30285 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
70874 |
14390 |
174 |
201 |
17 |
0 |
0 |
28 |
| OW |
43 |
3666 |
804 |
911 |
182 |
4 |
4 |
30 |
| VODI |
0 |
630 |
645 |
3642 |
1427 |
90 |
40 |
68 |
| ODI |
0 |
60 |
57 |
1210 |
3818 |
515 |
204 |
79 |
| CDI |
0 |
4 |
11 |
371 |
3813 |
7442 |
2727 |
199 |
| VCDI |
0 |
0 |
0 |
50 |
551 |
5890 |
39589 |
30283 |
|
Date: 2025-05-17:
| 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 |
70897 |
14617 |
118 |
181 |
8 |
4 |
0 |
16 |
| OW |
32 |
4082 |
608 |
1005 |
152 |
10 |
0 |
36 |
| VODI |
0 |
809 |
648 |
3624 |
1231 |
75 |
46 |
82 |
| ODI |
0 |
95 |
108 |
1383 |
3497 |
661 |
261 |
81 |
| CDI |
0 |
14 |
12 |
715 |
4229 |
6851 |
3073 |
515 |
| VCDI |
0 |
16 |
6 |
120 |
883 |
5666 |
32679 |
35597 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
70898 |
14525 |
143 |
232 |
13 |
4 |
0 |
22 |
| OW |
31 |
4091 |
587 |
1028 |
169 |
5 |
3 |
35 |
| VODI |
0 |
906 |
656 |
3587 |
1277 |
94 |
42 |
72 |
| ODI |
0 |
80 |
96 |
1389 |
3379 |
681 |
228 |
79 |
| CDI |
0 |
17 |
13 |
662 |
4177 |
6810 |
3113 |
620 |
| VCDI |
0 |
14 |
5 |
130 |
985 |
5673 |
32673 |
35499 |
|
Date: 2025-05-19:
| 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 |
71988 |
15367 |
171 |
210 |
15 |
1 |
0 |
12 |
| OW |
169 |
3625 |
1134 |
968 |
54 |
14 |
1 |
13 |
| VODI |
58 |
115 |
198 |
5001 |
864 |
50 |
4 |
35 |
| ODI |
0 |
6 |
0 |
762 |
5409 |
445 |
79 |
62 |
| CDI |
0 |
0 |
0 |
186 |
2744 |
8994 |
1129 |
118 |
| VCDI |
0 |
0 |
0 |
29 |
350 |
5114 |
35195 |
34054 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
71869 |
13717 |
172 |
254 |
17 |
3 |
0 |
28 |
| OW |
235 |
4053 |
576 |
1093 |
124 |
22 |
1 |
47 |
| VODI |
96 |
1188 |
589 |
3384 |
1327 |
108 |
41 |
75 |
| ODI |
15 |
149 |
119 |
1362 |
3139 |
672 |
298 |
70 |
| CDI |
0 |
6 |
47 |
937 |
3962 |
6974 |
2479 |
2351 |
| VCDI |
0 |
0 |
0 |
126 |
867 |
6839 |
33589 |
31723 |
|
Date: 2025-05-21:
| 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 |
72500 |
15260 |
174 |
281 |
14 |
3 |
0 |
6 |
| OW |
227 |
3029 |
959 |
1460 |
130 |
18 |
0 |
14 |
| VODI |
0 |
268 |
360 |
4293 |
1276 |
85 |
7 |
52 |
| ODI |
0 |
21 |
21 |
961 |
4656 |
554 |
94 |
70 |
| CDI |
0 |
0 |
0 |
357 |
3478 |
9050 |
2276 |
386 |
| VCDI |
0 |
0 |
1 |
40 |
407 |
6266 |
30175 |
35514 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
72285 |
13654 |
173 |
288 |
16 |
2 |
0 |
21 |
| OW |
415 |
3676 |
595 |
1318 |
176 |
30 |
1 |
53 |
| VODI |
27 |
906 |
537 |
3357 |
1430 |
151 |
75 |
73 |
| ODI |
0 |
292 |
126 |
1291 |
3315 |
680 |
335 |
85 |
| CDI |
0 |
50 |
83 |
1049 |
4204 |
7651 |
3078 |
3214 |
| VCDI |
0 |
0 |
1 |
89 |
820 |
7462 |
29063 |
32596 |
|
Date: 2025-05-23:
| 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 |
72864 |
15077 |
215 |
248 |
21 |
4 |
0 |
1 |
| OW |
49 |
3294 |
906 |
1659 |
154 |
23 |
2 |
10 |
| VODI |
0 |
407 |
409 |
4095 |
1444 |
115 |
27 |
53 |
| ODI |
0 |
29 |
32 |
1044 |
4486 |
701 |
125 |
68 |
| CDI |
0 |
0 |
1 |
438 |
3542 |
9680 |
3000 |
417 |
| VCDI |
0 |
0 |
0 |
48 |
460 |
5914 |
28826 |
34855 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
72523 |
13207 |
197 |
227 |
12 |
9 |
4 |
13 |
| OW |
390 |
3906 |
533 |
1574 |
208 |
38 |
16 |
54 |
| VODI |
0 |
1259 |
571 |
2954 |
1449 |
214 |
123 |
71 |
| ODI |
0 |
344 |
188 |
1506 |
3227 |
792 |
459 |
179 |
| CDI |
0 |
91 |
73 |
1169 |
4406 |
8574 |
3288 |
4195 |
| VCDI |
0 |
0 |
1 |
102 |
805 |
6810 |
28090 |
30892 |
|
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