Validation of sea ice concentration - Full domain
Bulletin date: 2025-05-01
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-04-25:
| 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 |
65684 |
16659 |
414 |
590 |
22 |
0 |
0 |
0 |
| OW |
19 |
1263 |
460 |
1288 |
333 |
23 |
4 |
0 |
| VODI |
6 |
152 |
169 |
1448 |
1515 |
270 |
23 |
0 |
| ODI |
3 |
11 |
18 |
443 |
2150 |
1439 |
177 |
32 |
| CDI |
2 |
0 |
0 |
75 |
1440 |
4725 |
2780 |
187 |
| VCDI |
0 |
0 |
0 |
33 |
587 |
3407 |
30399 |
56493 |
|
...date precedes bulletin
|
Date: 2025-04-27:
| 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 |
65898 |
16451 |
313 |
430 |
65 |
1 |
0 |
0 |
| OW |
21 |
1460 |
508 |
1402 |
363 |
45 |
8 |
0 |
| VODI |
5 |
286 |
203 |
1447 |
1642 |
396 |
73 |
0 |
| ODI |
6 |
35 |
35 |
656 |
2110 |
1556 |
207 |
14 |
| CDI |
0 |
3 |
6 |
143 |
1348 |
3702 |
3189 |
139 |
| VCDI |
0 |
0 |
1 |
78 |
787 |
3703 |
33372 |
52636 |
|
...date precedes bulletin
|
Date: 2025-04-29:
| 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 |
66240 |
16668 |
305 |
347 |
34 |
0 |
0 |
0 |
| OW |
10 |
1392 |
613 |
1088 |
235 |
10 |
0 |
0 |
| VODI |
6 |
106 |
132 |
2619 |
1415 |
66 |
19 |
0 |
| ODI |
2 |
3 |
7 |
293 |
2991 |
715 |
72 |
0 |
| CDI |
0 |
1 |
1 |
88 |
1241 |
5456 |
1394 |
17 |
| VCDI |
0 |
0 |
0 |
3 |
588 |
5056 |
34649 |
50861 |
|
...date precedes bulletin
|
Date: 2025-05-01:
| 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 |
66378 |
16175 |
318 |
256 |
12 |
0 |
0 |
0 |
| OW |
6 |
1715 |
528 |
1348 |
230 |
2 |
19 |
0 |
| VODI |
6 |
83 |
179 |
2884 |
1477 |
81 |
54 |
0 |
| ODI |
1 |
9 |
2 |
389 |
2836 |
891 |
146 |
1 |
| CDI |
0 |
8 |
4 |
96 |
1503 |
5401 |
2444 |
35 |
| VCDI |
0 |
0 |
0 |
43 |
969 |
6298 |
31311 |
50605 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
66378 |
16135 |
348 |
312 |
9 |
0 |
0 |
0 |
| OW |
6 |
1747 |
504 |
1333 |
229 |
2 |
19 |
0 |
| VODI |
5 |
89 |
169 |
2780 |
1482 |
79 |
51 |
0 |
| ODI |
2 |
11 |
6 |
451 |
2827 |
853 |
155 |
1 |
| CDI |
0 |
8 |
3 |
104 |
1558 |
5507 |
2651 |
32 |
| VCDI |
0 |
0 |
1 |
36 |
922 |
6232 |
31098 |
50608 |
|
Date: 2025-05-03:
| 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 |
67312 |
15047 |
208 |
187 |
6 |
0 |
0 |
0 |
| OW |
30 |
2194 |
626 |
1217 |
241 |
4 |
0 |
3 |
| VODI |
4 |
239 |
346 |
2708 |
1524 |
113 |
12 |
90 |
| ODI |
1 |
8 |
13 |
690 |
2740 |
1003 |
93 |
80 |
| CDI |
0 |
5 |
2 |
166 |
2180 |
5581 |
2439 |
343 |
| VCDI |
0 |
0 |
0 |
22 |
929 |
7242 |
28760 |
50335 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
67296 |
15117 |
242 |
234 |
14 |
1 |
0 |
0 |
| OW |
45 |
2102 |
584 |
1265 |
259 |
3 |
0 |
12 |
| VODI |
5 |
256 |
341 |
2564 |
1504 |
140 |
11 |
77 |
| ODI |
0 |
13 |
26 |
761 |
2774 |
1015 |
105 |
77 |
| CDI |
1 |
5 |
2 |
154 |
2211 |
5707 |
2576 |
398 |
| VCDI |
0 |
0 |
0 |
12 |
858 |
7077 |
28612 |
50287 |
|
Date: 2025-05-05:
| 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 |
66786 |
16321 |
237 |
177 |
5 |
0 |
0 |
0 |
| OW |
31 |
2001 |
864 |
1062 |
77 |
2 |
0 |
0 |
| VODI |
3 |
29 |
76 |
3410 |
1079 |
40 |
7 |
11 |
| ODI |
0 |
0 |
2 |
341 |
4229 |
410 |
68 |
41 |
| CDI |
0 |
0 |
0 |
45 |
2324 |
8908 |
1059 |
100 |
| VCDI |
0 |
0 |
0 |
23 |
452 |
5061 |
29048 |
50414 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
66755 |
15463 |
287 |
327 |
11 |
5 |
0 |
0 |
| OW |
56 |
2389 |
511 |
1483 |
339 |
4 |
1 |
11 |
| VODI |
8 |
451 |
325 |
2129 |
1816 |
171 |
20 |
85 |
| ODI |
1 |
48 |
56 |
805 |
2710 |
1191 |
157 |
85 |
| CDI |
0 |
0 |
0 |
274 |
2380 |
6398 |
3075 |
292 |
| VCDI |
0 |
0 |
0 |
40 |
910 |
6652 |
26929 |
50093 |
|
Date: 2025-05-07:
| 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 |
66902 |
16194 |
224 |
217 |
1 |
0 |
0 |
0 |
| OW |
50 |
2407 |
709 |
1101 |
114 |
4 |
0 |
7 |
| VODI |
8 |
152 |
260 |
3232 |
1373 |
93 |
9 |
33 |
| ODI |
0 |
10 |
11 |
591 |
3675 |
571 |
51 |
62 |
| CDI |
0 |
0 |
0 |
205 |
3358 |
7120 |
1109 |
279 |
| VCDI |
0 |
0 |
0 |
35 |
921 |
6519 |
26718 |
50418 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
66823 |
15194 |
246 |
284 |
14 |
0 |
0 |
5 |
| OW |
119 |
2857 |
557 |
1405 |
293 |
7 |
0 |
43 |
| VODI |
18 |
582 |
302 |
2279 |
1846 |
261 |
24 |
92 |
| ODI |
0 |
104 |
81 |
905 |
3040 |
974 |
144 |
114 |
| CDI |
0 |
26 |
18 |
434 |
3002 |
6125 |
2565 |
668 |
| VCDI |
0 |
0 |
0 |
74 |
1247 |
6940 |
25154 |
49877 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
68347 |
13738 |
170 |
232 |
21 |
3 |
0 |
36 |
| OW |
191 |
3398 |
480 |
1125 |
313 |
29 |
4 |
70 |
| VODI |
23 |
747 |
376 |
2381 |
1959 |
218 |
54 |
87 |
| ODI |
0 |
187 |
131 |
1106 |
3253 |
1004 |
178 |
94 |
| CDI |
0 |
40 |
53 |
628 |
3240 |
6128 |
2930 |
529 |
| VCDI |
0 |
1 |
0 |
227 |
1963 |
6505 |
24486 |
48058 |
|
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