Validation of sea ice concentration - American sector
Bulletin date: 2025-08-07
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
11184 |
3810 |
68 |
26 |
0 |
0 |
0 |
0 |
| OW |
21 |
1204 |
431 |
479 |
39 |
0 |
0 |
0 |
| VODI |
3 |
208 |
322 |
2964 |
733 |
9 |
0 |
0 |
| ODI |
0 |
54 |
19 |
521 |
3741 |
1755 |
96 |
0 |
| CDI |
0 |
65 |
34 |
99 |
3126 |
8687 |
2592 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
56 |
1390 |
2128 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-03:
| 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 |
11249 |
3799 |
71 |
30 |
1 |
0 |
0 |
0 |
| OW |
36 |
1393 |
501 |
467 |
25 |
0 |
0 |
0 |
| VODI |
12 |
257 |
449 |
3293 |
739 |
4 |
0 |
0 |
| ODI |
0 |
71 |
27 |
782 |
2817 |
1898 |
266 |
0 |
| CDI |
0 |
94 |
26 |
125 |
2781 |
7662 |
3606 |
202 |
| VCDI |
0 |
1 |
6 |
15 |
141 |
379 |
2420 |
221 |
|
...date precedes bulletin
|
Date: 2025-08-05:
| 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 |
11356 |
4168 |
95 |
62 |
2 |
0 |
0 |
0 |
| OW |
33 |
1221 |
654 |
595 |
35 |
0 |
0 |
0 |
| VODI |
0 |
77 |
183 |
3500 |
1212 |
62 |
0 |
0 |
| ODI |
0 |
8 |
10 |
245 |
3360 |
537 |
7 |
0 |
| CDI |
0 |
5 |
10 |
29 |
1712 |
8009 |
2040 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
6 |
1022 |
4891 |
716 |
|
...date precedes bulletin
|
Date: 2025-08-07:
| 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 |
11415 |
4165 |
108 |
73 |
2 |
0 |
0 |
0 |
| OW |
21 |
1319 |
566 |
557 |
75 |
0 |
0 |
0 |
| VODI |
0 |
142 |
302 |
3345 |
1244 |
62 |
0 |
0 |
| ODI |
0 |
8 |
10 |
411 |
3394 |
662 |
44 |
0 |
| CDI |
0 |
7 |
6 |
45 |
2159 |
7439 |
2919 |
0 |
| VCDI |
0 |
2 |
3 |
3 |
6 |
600 |
3607 |
1145 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11396 |
4316 |
158 |
117 |
11 |
0 |
0 |
0 |
| OW |
40 |
1160 |
518 |
555 |
80 |
0 |
0 |
0 |
| VODI |
0 |
148 |
297 |
3229 |
1290 |
57 |
0 |
0 |
| ODI |
0 |
10 |
10 |
477 |
3375 |
771 |
36 |
0 |
| CDI |
0 |
7 |
9 |
53 |
2118 |
7266 |
2821 |
0 |
| VCDI |
0 |
2 |
3 |
3 |
6 |
669 |
3713 |
1145 |
|
Date: 2025-08-09:
| 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 |
11535 |
4075 |
109 |
48 |
3 |
0 |
0 |
0 |
| OW |
22 |
1466 |
495 |
513 |
32 |
0 |
0 |
0 |
| VODI |
0 |
371 |
545 |
3347 |
1193 |
16 |
0 |
0 |
| ODI |
0 |
16 |
11 |
555 |
3428 |
1198 |
78 |
0 |
| CDI |
0 |
6 |
6 |
29 |
615 |
7061 |
3944 |
3 |
| VCDI |
0 |
3 |
4 |
3 |
19 |
472 |
3613 |
1032 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11530 |
4247 |
153 |
87 |
5 |
0 |
0 |
0 |
| OW |
27 |
1319 |
457 |
514 |
43 |
0 |
0 |
0 |
| VODI |
0 |
347 |
539 |
3222 |
1194 |
15 |
0 |
0 |
| ODI |
0 |
14 |
10 |
641 |
3223 |
1139 |
58 |
0 |
| CDI |
0 |
7 |
7 |
28 |
807 |
7058 |
3771 |
3 |
| VCDI |
0 |
3 |
4 |
3 |
18 |
535 |
3806 |
1032 |
|
Date: 2025-08-11:
| 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 |
11782 |
4164 |
138 |
61 |
9 |
0 |
0 |
0 |
| OW |
22 |
1478 |
459 |
428 |
28 |
2 |
0 |
0 |
| VODI |
0 |
441 |
555 |
3562 |
990 |
38 |
6 |
0 |
| ODI |
0 |
17 |
19 |
623 |
3596 |
1015 |
45 |
0 |
| CDI |
0 |
3 |
6 |
24 |
1122 |
7501 |
2298 |
0 |
| VCDI |
0 |
5 |
5 |
3 |
30 |
1594 |
3757 |
40 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11784 |
4013 |
111 |
46 |
8 |
0 |
0 |
0 |
| OW |
20 |
1618 |
486 |
457 |
32 |
1 |
0 |
0 |
| VODI |
0 |
453 |
558 |
3589 |
1040 |
39 |
8 |
0 |
| ODI |
0 |
16 |
17 |
581 |
3475 |
852 |
56 |
0 |
| CDI |
0 |
3 |
5 |
25 |
1189 |
7431 |
2338 |
0 |
| VCDI |
0 |
5 |
5 |
3 |
31 |
1827 |
3704 |
40 |
|
Date: 2025-08-13:
| 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 |
11191 |
5209 |
133 |
51 |
4 |
0 |
0 |
0 |
| OW |
6 |
1933 |
756 |
578 |
15 |
0 |
0 |
0 |
| VODI |
0 |
287 |
508 |
3480 |
507 |
12 |
0 |
0 |
| ODI |
0 |
3 |
9 |
606 |
4318 |
219 |
1 |
0 |
| CDI |
0 |
2 |
2 |
16 |
2648 |
5421 |
1637 |
0 |
| VCDI |
0 |
4 |
2 |
2 |
49 |
1250 |
4441 |
566 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11179 |
4711 |
141 |
64 |
4 |
0 |
0 |
0 |
| OW |
17 |
1731 |
493 |
540 |
25 |
0 |
0 |
0 |
| VODI |
1 |
975 |
743 |
3252 |
651 |
44 |
0 |
0 |
| ODI |
0 |
14 |
28 |
842 |
3641 |
485 |
16 |
0 |
| CDI |
0 |
1 |
2 |
29 |
3180 |
5106 |
2538 |
0 |
| VCDI |
0 |
6 |
3 |
6 |
40 |
1267 |
3525 |
566 |
|
Date: 2025-08-15:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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