Validation of sea ice concentration - Full domain
Bulletin date: 2025-08-14
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-08-08:
| 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 |
103997 |
13960 |
188 |
95 |
10 |
0 |
0 |
0 |
| OW |
2206 |
5125 |
1030 |
1025 |
118 |
3 |
0 |
0 |
| VODI |
1845 |
820 |
852 |
4599 |
1731 |
250 |
0 |
0 |
| ODI |
0 |
35 |
54 |
1045 |
8010 |
2053 |
116 |
0 |
| CDI |
0 |
4 |
16 |
144 |
4472 |
17068 |
4590 |
0 |
| VCDI |
0 |
1 |
4 |
4 |
15 |
170 |
3555 |
1600 |
|
...date precedes bulletin
|
Date: 2025-08-10:
| 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 |
104805 |
13332 |
134 |
54 |
6 |
0 |
0 |
0 |
| OW |
2194 |
5546 |
987 |
935 |
75 |
8 |
0 |
0 |
| VODI |
1812 |
1065 |
912 |
5241 |
1427 |
93 |
5 |
0 |
| ODI |
0 |
64 |
69 |
1299 |
7579 |
2631 |
253 |
0 |
| CDI |
0 |
5 |
32 |
192 |
5259 |
15444 |
3966 |
1 |
| VCDI |
0 |
4 |
3 |
2 |
20 |
860 |
4406 |
90 |
|
...date precedes bulletin
|
Date: 2025-08-12:
| 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 |
106748 |
13857 |
197 |
61 |
6 |
0 |
0 |
0 |
| OW |
2473 |
4944 |
1444 |
869 |
35 |
0 |
0 |
0 |
| VODI |
1723 |
250 |
737 |
5231 |
1175 |
23 |
0 |
0 |
| ODI |
0 |
5 |
2 |
750 |
10722 |
1864 |
0 |
0 |
| CDI |
0 |
5 |
3 |
8 |
3077 |
15411 |
2196 |
0 |
| VCDI |
0 |
4 |
2 |
2 |
38 |
1846 |
5102 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-14:
| 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 |
106954 |
13805 |
200 |
91 |
10 |
0 |
0 |
0 |
| OW |
2717 |
5274 |
1163 |
687 |
42 |
7 |
0 |
0 |
| VODI |
1564 |
615 |
1032 |
5149 |
928 |
29 |
0 |
0 |
| ODI |
0 |
5 |
6 |
1064 |
10804 |
1746 |
3 |
0 |
| CDI |
0 |
2 |
2 |
15 |
3980 |
14966 |
1171 |
0 |
| VCDI |
0 |
4 |
2 |
2 |
62 |
1791 |
4368 |
550 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
106969 |
14031 |
268 |
120 |
9 |
0 |
0 |
0 |
| OW |
2574 |
5084 |
1127 |
721 |
56 |
8 |
0 |
0 |
| VODI |
1692 |
579 |
996 |
4977 |
1035 |
31 |
0 |
0 |
| ODI |
0 |
5 |
10 |
1164 |
10742 |
2140 |
4 |
0 |
| CDI |
0 |
1 |
2 |
23 |
3915 |
14684 |
1307 |
0 |
| VCDI |
0 |
5 |
2 |
3 |
69 |
1676 |
4231 |
550 |
|
Date: 2025-08-16:
| 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 |
107379 |
13547 |
149 |
46 |
5 |
0 |
0 |
0 |
| OW |
2694 |
5780 |
836 |
514 |
50 |
5 |
0 |
0 |
| VODI |
1514 |
1000 |
1149 |
5186 |
1105 |
23 |
0 |
0 |
| ODI |
0 |
17 |
28 |
1325 |
11136 |
1300 |
3 |
0 |
| CDI |
0 |
2 |
2 |
54 |
4960 |
12493 |
1237 |
0 |
| VCDI |
0 |
3 |
1 |
1 |
88 |
1468 |
5160 |
550 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
107474 |
13707 |
197 |
93 |
9 |
0 |
0 |
0 |
| OW |
2592 |
5716 |
828 |
499 |
61 |
4 |
0 |
0 |
| VODI |
1521 |
895 |
1092 |
4990 |
1298 |
33 |
0 |
0 |
| ODI |
0 |
26 |
45 |
1477 |
11051 |
2009 |
31 |
0 |
| CDI |
0 |
2 |
2 |
66 |
4811 |
11830 |
1558 |
0 |
| VCDI |
0 |
3 |
1 |
1 |
114 |
1413 |
4811 |
550 |
|
Date: 2025-08-18:
| 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 |
107827 |
15739 |
127 |
63 |
4 |
0 |
0 |
0 |
| OW |
2566 |
5125 |
1768 |
928 |
16 |
2 |
0 |
0 |
| VODI |
1379 |
30 |
319 |
5253 |
1122 |
8 |
0 |
0 |
| ODI |
0 |
0 |
1 |
475 |
14617 |
1206 |
1 |
0 |
| CDI |
0 |
2 |
3 |
29 |
2359 |
12207 |
172 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
33 |
1244 |
5745 |
440 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
107596 |
13479 |
154 |
106 |
11 |
1 |
0 |
0 |
| OW |
2568 |
6004 |
681 |
530 |
59 |
8 |
1 |
0 |
| VODI |
1608 |
1369 |
1302 |
4348 |
1724 |
70 |
1 |
0 |
| ODI |
0 |
42 |
76 |
1662 |
11810 |
1701 |
6 |
0 |
| CDI |
0 |
1 |
5 |
100 |
4467 |
11200 |
997 |
0 |
| VCDI |
0 |
1 |
0 |
2 |
80 |
1687 |
4913 |
440 |
|
Date: 2025-08-20:
| 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 |
110923 |
12877 |
78 |
28 |
0 |
0 |
0 |
0 |
| OW |
2713 |
5914 |
1219 |
673 |
8 |
0 |
0 |
0 |
| VODI |
1357 |
432 |
824 |
4605 |
1156 |
19 |
0 |
0 |
| ODI |
0 |
3 |
15 |
928 |
12322 |
2920 |
3 |
0 |
| CDI |
0 |
6 |
7 |
73 |
2851 |
10531 |
1146 |
0 |
| VCDI |
0 |
2 |
3 |
9 |
33 |
2437 |
4690 |
5 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
110624 |
10638 |
121 |
65 |
6 |
0 |
0 |
0 |
| OW |
2907 |
6222 |
550 |
507 |
35 |
4 |
0 |
0 |
| VODI |
1462 |
2299 |
1335 |
3729 |
1711 |
96 |
0 |
0 |
| ODI |
0 |
64 |
119 |
1840 |
10419 |
2645 |
25 |
0 |
| CDI |
0 |
7 |
16 |
163 |
4131 |
10693 |
1335 |
0 |
| VCDI |
0 |
4 |
5 |
12 |
68 |
2469 |
4479 |
5 |
|
Date: 2025-08-22:
| 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 |
111350 |
12591 |
81 |
28 |
1 |
0 |
0 |
0 |
| OW |
2780 |
6118 |
1142 |
677 |
11 |
0 |
0 |
0 |
| VODI |
1313 |
625 |
1013 |
4284 |
1393 |
30 |
0 |
0 |
| ODI |
0 |
9 |
27 |
1249 |
10603 |
3550 |
11 |
0 |
| CDI |
0 |
11 |
14 |
106 |
3317 |
10700 |
1252 |
0 |
| VCDI |
0 |
4 |
4 |
14 |
31 |
2522 |
3949 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
111009 |
10264 |
111 |
69 |
1 |
0 |
0 |
0 |
| OW |
2992 |
6335 |
629 |
706 |
80 |
3 |
0 |
0 |
| VODI |
1442 |
2609 |
1363 |
3223 |
1988 |
192 |
0 |
0 |
| ODI |
0 |
135 |
151 |
2145 |
8513 |
3192 |
121 |
0 |
| CDI |
0 |
10 |
23 |
198 |
4723 |
10906 |
1455 |
0 |
| VCDI |
0 |
5 |
4 |
17 |
51 |
2509 |
3636 |
0 |
|
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