Validation of sea ice concentration - American sector
Bulletin date: 2025-07-17
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-07-11:
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 |
6260 |
4613 |
63 |
25 |
0 |
0 |
0 |
0 |
OW |
50 |
1435 |
205 |
284 |
29 |
1 |
0 |
0 |
VODI |
1 |
209 |
172 |
835 |
723 |
44 |
4 |
0 |
ODI |
0 |
18 |
27 |
176 |
2361 |
1670 |
1 |
0 |
CDI |
0 |
0 |
4 |
79 |
4729 |
14976 |
703 |
0 |
VCDI |
0 |
0 |
0 |
10 |
599 |
2967 |
2593 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-13:
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 |
6827 |
4340 |
36 |
31 |
3 |
2 |
0 |
0 |
OW |
33 |
1463 |
178 |
278 |
41 |
10 |
4 |
0 |
VODI |
3 |
269 |
153 |
783 |
708 |
91 |
11 |
0 |
ODI |
0 |
40 |
42 |
241 |
2471 |
1055 |
70 |
0 |
CDI |
0 |
27 |
6 |
47 |
3599 |
16879 |
2082 |
0 |
VCDI |
0 |
3 |
2 |
15 |
634 |
1880 |
1509 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-15:
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 |
7044 |
5054 |
32 |
38 |
2 |
2 |
0 |
0 |
OW |
18 |
1086 |
338 |
352 |
21 |
7 |
0 |
0 |
VODI |
0 |
55 |
105 |
1146 |
612 |
17 |
0 |
0 |
ODI |
0 |
4 |
4 |
158 |
4844 |
556 |
0 |
0 |
CDI |
0 |
4 |
8 |
26 |
4597 |
14197 |
1154 |
0 |
VCDI |
0 |
0 |
0 |
5 |
464 |
2224 |
1692 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-17:
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 |
7813 |
4623 |
24 |
16 |
5 |
6 |
0 |
0 |
OW |
4 |
1103 |
265 |
336 |
30 |
5 |
0 |
0 |
VODI |
0 |
102 |
154 |
1226 |
703 |
23 |
0 |
0 |
ODI |
0 |
8 |
9 |
178 |
4685 |
682 |
0 |
0 |
CDI |
0 |
20 |
6 |
52 |
4007 |
14042 |
1547 |
0 |
VCDI |
0 |
0 |
0 |
40 |
551 |
2168 |
1433 |
0 |
|
|
observations |
|
Ice free |
Ice free near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI near MIZ |
VCDI |
m o d e l |
Ice free |
7811 |
4594 |
27 |
14 |
6 |
6 |
0 |
0 |
OW |
6 |
1117 |
253 |
347 |
31 |
9 |
0 |
0 |
VODI |
0 |
115 |
160 |
1196 |
756 |
23 |
0 |
0 |
ODI |
0 |
10 |
11 |
190 |
4609 |
725 |
0 |
0 |
CDI |
0 |
20 |
6 |
59 |
4030 |
14121 |
1579 |
0 |
VCDI |
0 |
0 |
1 |
42 |
549 |
2042 |
1401 |
0 |
|
Date: 2025-07-19:
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 |
8519 |
4302 |
18 |
17 |
1 |
0 |
0 |
0 |
OW |
40 |
1075 |
250 |
321 |
32 |
2 |
0 |
0 |
VODI |
1 |
133 |
168 |
1218 |
1087 |
23 |
0 |
0 |
ODI |
0 |
21 |
11 |
173 |
3438 |
807 |
1 |
0 |
CDI |
0 |
23 |
10 |
55 |
3030 |
17085 |
592 |
0 |
VCDI |
0 |
0 |
0 |
48 |
443 |
2815 |
107 |
0 |
|
|
observations |
|
Ice free |
Ice free near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI near MIZ |
VCDI |
m o d e l |
Ice free |
8512 |
4294 |
21 |
31 |
7 |
0 |
0 |
0 |
OW |
45 |
1060 |
253 |
356 |
32 |
4 |
0 |
0 |
VODI |
3 |
155 |
163 |
1151 |
1080 |
19 |
0 |
0 |
ODI |
0 |
23 |
6 |
175 |
3554 |
1215 |
2 |
0 |
CDI |
0 |
22 |
13 |
71 |
2913 |
16663 |
568 |
0 |
VCDI |
0 |
0 |
1 |
48 |
445 |
2831 |
130 |
0 |
|
Date: 2025-07-21:
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 |
8920 |
4859 |
43 |
23 |
0 |
0 |
0 |
0 |
OW |
11 |
804 |
439 |
369 |
12 |
0 |
0 |
0 |
VODI |
0 |
20 |
37 |
1533 |
752 |
5 |
0 |
0 |
ODI |
0 |
15 |
8 |
97 |
6669 |
424 |
0 |
0 |
CDI |
0 |
16 |
18 |
115 |
1483 |
15653 |
396 |
0 |
VCDI |
0 |
0 |
0 |
14 |
247 |
1129 |
1755 |
0 |
|
|
observations |
|
Ice free |
Ice free near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI near MIZ |
VCDI |
m o d e l |
Ice free |
8875 |
4390 |
36 |
31 |
1 |
0 |
0 |
0 |
OW |
56 |
1053 |
256 |
415 |
42 |
2 |
0 |
0 |
VODI |
0 |
187 |
199 |
1289 |
1184 |
60 |
0 |
0 |
ODI |
0 |
41 |
12 |
239 |
3490 |
609 |
0 |
0 |
CDI |
0 |
35 |
27 |
74 |
4036 |
13975 |
1185 |
0 |
VCDI |
0 |
8 |
15 |
103 |
410 |
2565 |
966 |
0 |
|
Date: 2025-07-23:
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 |
10008 |
3995 |
72 |
15 |
0 |
0 |
0 |
0 |
OW |
24 |
812 |
415 |
456 |
25 |
0 |
0 |
0 |
VODI |
0 |
56 |
67 |
1761 |
773 |
7 |
0 |
0 |
ODI |
0 |
14 |
6 |
171 |
5803 |
591 |
0 |
0 |
CDI |
0 |
36 |
25 |
94 |
3312 |
12279 |
452 |
0 |
VCDI |
0 |
0 |
3 |
29 |
373 |
3063 |
1129 |
0 |
|
|
observations |
|
Ice free |
Ice free near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI near MIZ |
VCDI |
m o d e l |
Ice free |
9899 |
3524 |
31 |
21 |
10 |
0 |
0 |
0 |
OW |
132 |
995 |
301 |
459 |
38 |
6 |
0 |
0 |
VODI |
1 |
267 |
194 |
1560 |
1117 |
31 |
0 |
0 |
ODI |
0 |
63 |
22 |
321 |
3822 |
406 |
0 |
0 |
CDI |
0 |
41 |
21 |
60 |
4771 |
11611 |
645 |
0 |
VCDI |
0 |
23 |
19 |
105 |
528 |
3886 |
936 |
0 |
|
Date: 2025-07-25:
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 |
10607 |
3634 |
85 |
37 |
1 |
0 |
0 |
0 |
OW |
14 |
860 |
346 |
524 |
39 |
1 |
0 |
0 |
VODI |
0 |
109 |
89 |
1576 |
1078 |
25 |
0 |
0 |
ODI |
0 |
19 |
5 |
129 |
4210 |
1493 |
0 |
0 |
CDI |
0 |
62 |
33 |
61 |
4600 |
11813 |
50 |
0 |
VCDI |
0 |
6 |
18 |
96 |
977 |
3088 |
181 |
0 |
|
|
observations |
|
Ice free |
Ice free near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI near MIZ |
VCDI |
m o d e l |
Ice free |
10502 |
3134 |
63 |
39 |
19 |
2 |
0 |
0 |
OW |
117 |
1038 |
284 |
463 |
71 |
5 |
0 |
0 |
VODI |
2 |
327 |
144 |
1393 |
1118 |
178 |
0 |
0 |
ODI |
0 |
78 |
27 |
323 |
2507 |
1710 |
0 |
0 |
CDI |
0 |
46 |
13 |
80 |
6213 |
10218 |
17 |
0 |
VCDI |
0 |
67 |
45 |
125 |
977 |
4307 |
214 |
0 |
|
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