Validation of sea ice concentration - American sector
Bulletin date: 2025-06-12
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-06-06:
| 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 |
0 |
681 |
13 |
9 |
0 |
0 |
0 |
0 |
| OW |
0 |
980 |
156 |
221 |
14 |
10 |
0 |
0 |
| VODI |
0 |
346 |
172 |
653 |
461 |
86 |
9 |
0 |
| ODI |
0 |
89 |
73 |
437 |
661 |
368 |
69 |
0 |
| CDI |
0 |
64 |
41 |
305 |
1405 |
4079 |
1779 |
0 |
| VCDI |
0 |
16 |
15 |
40 |
373 |
2637 |
17838 |
11766 |
|
...date precedes bulletin
|
Date: 2025-06-08:
| 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 |
0 |
861 |
23 |
16 |
2 |
0 |
0 |
0 |
| OW |
0 |
917 |
179 |
315 |
53 |
4 |
0 |
0 |
| VODI |
0 |
389 |
158 |
632 |
549 |
81 |
0 |
0 |
| ODI |
0 |
145 |
106 |
475 |
686 |
321 |
28 |
0 |
| CDI |
0 |
104 |
54 |
366 |
1839 |
3844 |
1494 |
0 |
| VCDI |
0 |
23 |
17 |
33 |
147 |
2617 |
18287 |
11101 |
|
...date precedes bulletin
|
Date: 2025-06-10:
| 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 |
0 |
1123 |
49 |
16 |
1 |
0 |
0 |
0 |
| OW |
0 |
1050 |
184 |
272 |
27 |
0 |
0 |
0 |
| VODI |
0 |
444 |
253 |
1021 |
503 |
29 |
0 |
0 |
| ODI |
0 |
55 |
34 |
318 |
1371 |
674 |
11 |
0 |
| CDI |
0 |
56 |
32 |
177 |
1104 |
3847 |
560 |
0 |
| VCDI |
0 |
1 |
0 |
23 |
114 |
3925 |
19749 |
8843 |
|
...date precedes bulletin
|
Date: 2025-06-12:
| 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 |
0 |
1445 |
39 |
21 |
2 |
0 |
0 |
0 |
| OW |
0 |
1156 |
214 |
292 |
48 |
2 |
0 |
0 |
| VODI |
0 |
516 |
301 |
954 |
486 |
76 |
5 |
0 |
| ODI |
0 |
94 |
42 |
291 |
833 |
860 |
90 |
0 |
| CDI |
0 |
120 |
44 |
188 |
796 |
3820 |
1122 |
3 |
| VCDI |
0 |
0 |
3 |
22 |
619 |
9177 |
13988 |
8197 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
1509 |
34 |
26 |
2 |
0 |
0 |
0 |
| OW |
0 |
1098 |
231 |
288 |
44 |
4 |
0 |
0 |
| VODI |
0 |
492 |
282 |
963 |
481 |
68 |
2 |
0 |
| ODI |
0 |
106 |
40 |
273 |
772 |
815 |
85 |
0 |
| CDI |
0 |
126 |
52 |
197 |
844 |
3931 |
1289 |
3 |
| VCDI |
0 |
0 |
4 |
21 |
641 |
9117 |
13829 |
8197 |
|
Date: 2025-06-14:
| 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 |
0 |
1571 |
63 |
47 |
3 |
0 |
0 |
0 |
| OW |
0 |
1235 |
268 |
349 |
68 |
2 |
0 |
0 |
| VODI |
0 |
725 |
246 |
790 |
589 |
66 |
0 |
0 |
| ODI |
0 |
105 |
64 |
371 |
1096 |
540 |
23 |
0 |
| CDI |
0 |
138 |
46 |
174 |
1294 |
3163 |
1279 |
10 |
| VCDI |
0 |
6 |
8 |
29 |
2384 |
9844 |
13608 |
5662 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
1622 |
68 |
59 |
3 |
0 |
0 |
0 |
| OW |
0 |
1210 |
265 |
359 |
82 |
5 |
0 |
0 |
| VODI |
0 |
687 |
243 |
764 |
499 |
79 |
1 |
0 |
| ODI |
0 |
112 |
58 |
349 |
1112 |
520 |
41 |
0 |
| CDI |
0 |
137 |
50 |
203 |
1365 |
3201 |
1371 |
4 |
| VCDI |
0 |
12 |
11 |
26 |
2373 |
9810 |
13497 |
5668 |
|
Date: 2025-06-16:
| 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 |
71 |
2229 |
98 |
42 |
8 |
0 |
0 |
0 |
| OW |
25 |
1784 |
372 |
400 |
18 |
0 |
0 |
0 |
| VODI |
0 |
325 |
200 |
796 |
494 |
29 |
0 |
0 |
| ODI |
0 |
57 |
36 |
219 |
660 |
691 |
12 |
3 |
| CDI |
0 |
13 |
17 |
69 |
657 |
6550 |
967 |
1 |
| VCDI |
0 |
0 |
0 |
3 |
2701 |
7883 |
15507 |
2929 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
78 |
1803 |
88 |
46 |
8 |
0 |
0 |
0 |
| OW |
15 |
1460 |
273 |
380 |
75 |
3 |
0 |
0 |
| VODI |
3 |
776 |
200 |
567 |
441 |
184 |
21 |
0 |
| ODI |
0 |
199 |
94 |
308 |
481 |
1007 |
132 |
0 |
| CDI |
0 |
162 |
65 |
215 |
612 |
4070 |
1870 |
4 |
| VCDI |
0 |
8 |
3 |
13 |
2921 |
9889 |
14463 |
2929 |
|
Date: 2025-06-18:
| 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 |
168 |
2462 |
61 |
30 |
1 |
0 |
0 |
0 |
| OW |
6 |
2066 |
278 |
238 |
30 |
1 |
0 |
0 |
| VODI |
1 |
493 |
237 |
684 |
419 |
27 |
0 |
0 |
| ODI |
0 |
75 |
54 |
313 |
1145 |
376 |
31 |
0 |
| CDI |
0 |
10 |
9 |
117 |
1869 |
3815 |
1280 |
41 |
| VCDI |
0 |
0 |
0 |
5 |
381 |
9050 |
15447 |
4646 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
167 |
1954 |
63 |
45 |
5 |
1 |
0 |
0 |
| OW |
7 |
1775 |
228 |
284 |
78 |
12 |
0 |
0 |
| VODI |
1 |
926 |
162 |
437 |
445 |
120 |
45 |
0 |
| ODI |
0 |
252 |
122 |
365 |
1132 |
444 |
118 |
0 |
| CDI |
0 |
188 |
57 |
240 |
1775 |
2882 |
1321 |
5 |
| VCDI |
0 |
11 |
7 |
16 |
410 |
9810 |
15274 |
4682 |
|
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 |
545 |
2617 |
23 |
11 |
1 |
0 |
0 |
0 |
| OW |
71 |
1982 |
204 |
192 |
23 |
0 |
0 |
0 |
| VODI |
6 |
592 |
227 |
652 |
319 |
31 |
18 |
0 |
| ODI |
0 |
75 |
73 |
504 |
1393 |
379 |
122 |
0 |
| CDI |
0 |
6 |
12 |
155 |
1826 |
3155 |
1297 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
1745 |
11282 |
15485 |
838 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
494 |
1801 |
35 |
44 |
6 |
0 |
0 |
0 |
| OW |
104 |
2014 |
172 |
251 |
82 |
13 |
5 |
0 |
| VODI |
24 |
967 |
152 |
452 |
391 |
121 |
55 |
0 |
| ODI |
0 |
297 |
104 |
446 |
1355 |
326 |
119 |
0 |
| CDI |
0 |
193 |
76 |
320 |
1736 |
2639 |
1863 |
27 |
| VCDI |
0 |
0 |
0 |
6 |
1737 |
11748 |
14880 |
811 |
|
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