Validation of sea ice concentration - American sector
Bulletin date: 2025-07-24
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-07-18:
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 |
8393 |
4206 |
19 |
10 |
3 |
4 |
0 |
0 |
OW |
39 |
1103 |
255 |
284 |
35 |
7 |
0 |
0 |
VODI |
6 |
113 |
152 |
1226 |
876 |
30 |
0 |
0 |
ODI |
0 |
12 |
8 |
141 |
3557 |
1419 |
0 |
0 |
CDI |
0 |
24 |
7 |
36 |
4333 |
14601 |
1334 |
0 |
VCDI |
0 |
0 |
0 |
30 |
500 |
1649 |
1454 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-20:
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 |
8705 |
4352 |
21 |
13 |
0 |
0 |
0 |
0 |
OW |
36 |
1082 |
280 |
319 |
35 |
2 |
0 |
0 |
VODI |
0 |
182 |
176 |
1173 |
1262 |
55 |
0 |
0 |
ODI |
0 |
26 |
16 |
208 |
2769 |
957 |
0 |
0 |
CDI |
0 |
26 |
10 |
47 |
2654 |
16189 |
2010 |
0 |
VCDI |
0 |
3 |
3 |
85 |
418 |
1501 |
1251 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-22:
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 |
10406 |
3535 |
44 |
8 |
0 |
0 |
0 |
0 |
OW |
22 |
817 |
440 |
420 |
16 |
1 |
0 |
0 |
VODI |
0 |
54 |
67 |
1502 |
830 |
14 |
0 |
0 |
ODI |
0 |
16 |
6 |
106 |
5990 |
687 |
0 |
0 |
CDI |
0 |
32 |
20 |
112 |
2243 |
13665 |
977 |
0 |
VCDI |
0 |
0 |
2 |
33 |
300 |
3107 |
394 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-24:
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 |
10436 |
3685 |
86 |
24 |
1 |
0 |
0 |
0 |
OW |
17 |
822 |
378 |
481 |
33 |
0 |
0 |
0 |
VODI |
0 |
81 |
100 |
1831 |
788 |
24 |
0 |
0 |
ODI |
0 |
15 |
5 |
153 |
4237 |
1850 |
0 |
0 |
CDI |
0 |
50 |
38 |
80 |
2941 |
12499 |
459 |
0 |
VCDI |
0 |
4 |
11 |
65 |
588 |
3262 |
822 |
0 |
|
|
observations |
|
Ice free |
Ice free near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI near MIZ |
VCDI |
m o d e l |
Ice free |
10432 |
3748 |
105 |
46 |
1 |
0 |
0 |
0 |
OW |
21 |
755 |
354 |
425 |
31 |
0 |
0 |
0 |
VODI |
0 |
85 |
104 |
1804 |
692 |
29 |
0 |
0 |
ODI |
0 |
15 |
6 |
214 |
4499 |
1982 |
0 |
0 |
CDI |
0 |
50 |
39 |
91 |
2840 |
12030 |
450 |
0 |
VCDI |
0 |
4 |
10 |
54 |
525 |
3594 |
831 |
0 |
|
Date: 2025-07-26:
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 |
10719 |
3632 |
72 |
36 |
2 |
0 |
0 |
0 |
OW |
15 |
916 |
367 |
502 |
33 |
0 |
0 |
0 |
VODI |
1 |
138 |
126 |
1783 |
879 |
13 |
0 |
0 |
ODI |
0 |
21 |
8 |
171 |
4404 |
910 |
0 |
0 |
CDI |
0 |
76 |
37 |
65 |
4614 |
10662 |
1135 |
0 |
VCDI |
0 |
14 |
17 |
92 |
709 |
3151 |
546 |
0 |
|
|
observations |
|
Ice free |
Ice free near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI near MIZ |
VCDI |
m o d e l |
Ice free |
10715 |
3693 |
91 |
54 |
4 |
0 |
0 |
0 |
OW |
19 |
829 |
332 |
431 |
41 |
1 |
0 |
0 |
VODI |
1 |
161 |
137 |
1724 |
798 |
19 |
0 |
0 |
ODI |
0 |
23 |
13 |
277 |
4643 |
1234 |
0 |
0 |
CDI |
0 |
77 |
40 |
87 |
4401 |
9374 |
1167 |
0 |
VCDI |
0 |
14 |
14 |
76 |
754 |
4108 |
514 |
0 |
|
Date: 2025-07-28:
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 |
10781 |
4307 |
120 |
35 |
0 |
0 |
0 |
0 |
OW |
2 |
881 |
511 |
434 |
16 |
0 |
0 |
0 |
VODI |
0 |
50 |
77 |
2111 |
607 |
5 |
0 |
0 |
ODI |
0 |
37 |
18 |
124 |
6830 |
106 |
0 |
0 |
CDI |
0 |
36 |
14 |
97 |
2295 |
13131 |
359 |
0 |
VCDI |
0 |
0 |
0 |
1 |
92 |
694 |
2095 |
0 |
|
|
observations |
|
Ice free |
Ice free near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI near MIZ |
VCDI |
m o d e l |
Ice free |
10780 |
3893 |
101 |
77 |
4 |
0 |
0 |
0 |
OW |
2 |
1006 |
316 |
412 |
44 |
19 |
0 |
0 |
VODI |
1 |
231 |
254 |
1766 |
747 |
71 |
0 |
0 |
ODI |
0 |
36 |
17 |
355 |
3905 |
1259 |
11 |
0 |
CDI |
0 |
100 |
26 |
75 |
3818 |
7602 |
1395 |
0 |
VCDI |
0 |
45 |
26 |
117 |
1322 |
4985 |
1048 |
0 |
|
Date: 2025-07-30:
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 |
11111 |
3939 |
74 |
22 |
0 |
0 |
0 |
0 |
OW |
23 |
987 |
426 |
550 |
19 |
0 |
0 |
0 |
VODI |
3 |
98 |
121 |
2449 |
980 |
8 |
0 |
0 |
ODI |
0 |
38 |
12 |
296 |
4812 |
1187 |
0 |
0 |
CDI |
0 |
40 |
31 |
100 |
2813 |
12299 |
31 |
0 |
VCDI |
0 |
0 |
1 |
7 |
62 |
2946 |
381 |
0 |
|
|
observations |
|
Ice free |
Ice free near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI near MIZ |
VCDI |
m o d e l |
Ice free |
11103 |
3574 |
75 |
80 |
3 |
0 |
0 |
0 |
OW |
27 |
1031 |
261 |
506 |
63 |
0 |
0 |
0 |
VODI |
6 |
295 |
255 |
2016 |
733 |
73 |
0 |
0 |
ODI |
1 |
30 |
18 |
664 |
3233 |
1921 |
0 |
0 |
CDI |
0 |
105 |
18 |
46 |
3510 |
8156 |
21 |
0 |
VCDI |
0 |
67 |
38 |
112 |
1144 |
6290 |
391 |
0 |
|
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 |
|
|
observations |
|
Ice free |
Ice free near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI near MIZ |
VCDI |
m o d e l |
Ice free |
11187 |
3414 |
80 |
92 |
8 |
0 |
0 |
0 |
OW |
16 |
1145 |
277 |
466 |
62 |
1 |
0 |
0 |
VODI |
5 |
527 |
425 |
2003 |
511 |
78 |
0 |
0 |
ODI |
0 |
45 |
26 |
1321 |
2292 |
1882 |
257 |
0 |
CDI |
0 |
159 |
41 |
158 |
4296 |
6111 |
3566 |
0 |
VCDI |
0 |
51 |
25 |
51 |
526 |
3769 |
993 |
0 |
|
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