Validation of sea ice concentration - American sector
Bulletin date: 2025-07-10
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
3059 |
4441 |
83 |
55 |
11 |
0 |
0 |
0 |
| OW |
68 |
2828 |
597 |
646 |
75 |
7 |
0 |
0 |
| VODI |
18 |
283 |
173 |
820 |
604 |
61 |
2 |
0 |
| ODI |
0 |
40 |
34 |
322 |
1828 |
654 |
9 |
0 |
| CDI |
0 |
5 |
11 |
78 |
2949 |
5457 |
285 |
0 |
| VCDI |
0 |
1 |
1 |
2 |
3428 |
12109 |
4821 |
1 |
|
...date precedes bulletin
|
Date: 2025-07-06:
| 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 |
3102 |
5428 |
79 |
88 |
4 |
0 |
0 |
0 |
| OW |
30 |
2586 |
380 |
598 |
109 |
5 |
0 |
0 |
| VODI |
4 |
287 |
158 |
693 |
558 |
48 |
0 |
0 |
| ODI |
0 |
54 |
54 |
412 |
1952 |
337 |
8 |
0 |
| CDI |
0 |
9 |
17 |
121 |
3590 |
4718 |
63 |
0 |
| VCDI |
0 |
1 |
1 |
6 |
3120 |
12972 |
4274 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-08:
| 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 |
4726 |
6093 |
87 |
80 |
2 |
0 |
0 |
0 |
| OW |
22 |
1175 |
320 |
355 |
77 |
0 |
0 |
0 |
| VODI |
0 |
77 |
162 |
940 |
626 |
18 |
0 |
0 |
| ODI |
0 |
2 |
2 |
129 |
3914 |
408 |
3 |
0 |
| CDI |
0 |
1 |
1 |
50 |
3706 |
13887 |
143 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
633 |
5215 |
3009 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-10:
| 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 |
5830 |
5076 |
37 |
38 |
4 |
0 |
0 |
0 |
| OW |
48 |
1328 |
251 |
287 |
30 |
0 |
0 |
0 |
| VODI |
1 |
195 |
187 |
876 |
661 |
32 |
3 |
0 |
| ODI |
0 |
11 |
17 |
152 |
3177 |
906 |
5 |
0 |
| CDI |
0 |
0 |
1 |
85 |
5530 |
13952 |
264 |
0 |
| VCDI |
0 |
0 |
0 |
7 |
615 |
2611 |
3647 |
2 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5795 |
5108 |
42 |
39 |
3 |
0 |
0 |
0 |
| OW |
82 |
1269 |
235 |
292 |
26 |
0 |
0 |
0 |
| VODI |
2 |
220 |
202 |
862 |
639 |
26 |
3 |
0 |
| ODI |
0 |
13 |
12 |
160 |
3171 |
1065 |
4 |
0 |
| CDI |
0 |
0 |
2 |
84 |
5592 |
13764 |
317 |
0 |
| VCDI |
0 |
0 |
0 |
8 |
586 |
2646 |
3595 |
2 |
|
Date: 2025-07-12:
| 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 |
6084 |
4910 |
39 |
40 |
3 |
0 |
0 |
0 |
| OW |
32 |
1408 |
192 |
287 |
50 |
5 |
3 |
0 |
| VODI |
2 |
220 |
150 |
834 |
751 |
83 |
3 |
0 |
| ODI |
0 |
26 |
38 |
214 |
2047 |
1333 |
464 |
0 |
| CDI |
0 |
5 |
14 |
69 |
2373 |
16765 |
2092 |
0 |
| VCDI |
0 |
2 |
2 |
10 |
658 |
2124 |
2534 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
6073 |
4944 |
40 |
45 |
0 |
0 |
0 |
0 |
| OW |
44 |
1348 |
173 |
276 |
42 |
3 |
3 |
0 |
| VODI |
1 |
242 |
171 |
829 |
807 |
102 |
3 |
0 |
| ODI |
0 |
30 |
39 |
217 |
1935 |
1542 |
468 |
0 |
| CDI |
0 |
5 |
10 |
72 |
2445 |
16536 |
2183 |
0 |
| VCDI |
0 |
2 |
2 |
15 |
653 |
2127 |
2439 |
0 |
|
Date: 2025-07-14:
| 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 |
5331 |
6085 |
66 |
50 |
2 |
7 |
0 |
0 |
| OW |
15 |
1366 |
166 |
233 |
39 |
10 |
0 |
0 |
| VODI |
0 |
293 |
203 |
865 |
740 |
84 |
0 |
0 |
| ODI |
0 |
42 |
21 |
330 |
2606 |
666 |
0 |
0 |
| CDI |
0 |
28 |
15 |
52 |
5440 |
15422 |
2091 |
0 |
| VCDI |
0 |
3 |
3 |
16 |
543 |
1682 |
1351 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5335 |
5930 |
57 |
37 |
2 |
8 |
0 |
0 |
| OW |
11 |
1506 |
176 |
243 |
22 |
9 |
0 |
0 |
| VODI |
0 |
300 |
198 |
844 |
761 |
76 |
0 |
0 |
| ODI |
0 |
48 |
26 |
363 |
2774 |
746 |
0 |
0 |
| CDI |
0 |
30 |
15 |
45 |
5277 |
15271 |
2142 |
0 |
| VCDI |
0 |
3 |
2 |
14 |
534 |
1761 |
1300 |
0 |
|
Date: 2025-07-16:
| 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 |
6350 |
5847 |
54 |
41 |
2 |
4 |
0 |
0 |
| OW |
11 |
1110 |
274 |
344 |
29 |
5 |
0 |
0 |
| VODI |
0 |
96 |
139 |
1204 |
600 |
23 |
0 |
0 |
| ODI |
0 |
7 |
6 |
232 |
4930 |
518 |
0 |
0 |
| CDI |
0 |
8 |
8 |
35 |
5450 |
12730 |
1473 |
0 |
| VCDI |
0 |
0 |
1 |
18 |
616 |
2179 |
1522 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
6353 |
5021 |
53 |
74 |
10 |
11 |
0 |
0 |
| OW |
8 |
1594 |
176 |
293 |
51 |
2 |
0 |
0 |
| VODI |
0 |
366 |
204 |
956 |
653 |
29 |
0 |
0 |
| ODI |
0 |
50 |
33 |
495 |
3130 |
323 |
3 |
0 |
| CDI |
0 |
32 |
9 |
27 |
7173 |
13219 |
1684 |
0 |
| VCDI |
0 |
5 |
7 |
29 |
610 |
1875 |
1308 |
0 |
|
Date: 2025-07-18:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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