Validation of sea ice concentration - Full domain
Bulletin date: 2025-09-18
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-09-12:
| 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 |
115988 |
13103 |
63 |
17 |
0 |
0 |
0 |
0 |
| OW |
2615 |
4872 |
909 |
784 |
127 |
2 |
0 |
0 |
| VODI |
1305 |
359 |
573 |
4005 |
1581 |
93 |
0 |
0 |
| ODI |
0 |
9 |
10 |
915 |
4138 |
1585 |
9 |
0 |
| CDI |
0 |
1 |
1 |
42 |
2569 |
12679 |
1335 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
13 |
5644 |
5464 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-14:
| 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 |
116791 |
12371 |
88 |
25 |
0 |
0 |
0 |
0 |
| OW |
2804 |
4453 |
726 |
755 |
172 |
5 |
0 |
0 |
| VODI |
1374 |
617 |
615 |
3173 |
1867 |
193 |
2 |
0 |
| ODI |
0 |
5 |
15 |
934 |
3352 |
1734 |
33 |
0 |
| CDI |
0 |
0 |
0 |
21 |
1664 |
11324 |
871 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
9 |
6542 |
8275 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-16:
| 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 |
117718 |
13953 |
128 |
53 |
5 |
0 |
0 |
0 |
| OW |
2382 |
3077 |
909 |
869 |
59 |
0 |
0 |
0 |
| VODI |
1466 |
123 |
242 |
3046 |
1126 |
54 |
0 |
0 |
| ODI |
0 |
0 |
12 |
438 |
3291 |
598 |
6 |
0 |
| CDI |
0 |
0 |
0 |
18 |
1751 |
11981 |
1309 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
102 |
4221 |
11821 |
51 |
|
...date precedes bulletin
|
Date: 2025-09-18:
| 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 |
108762 |
10270 |
12485 |
328 |
1 |
0 |
0 |
0 |
| OW |
2316 |
1480 |
2455 |
815 |
88 |
12 |
0 |
0 |
| VODI |
1499 |
118 |
1277 |
2129 |
970 |
110 |
0 |
0 |
| ODI |
0 |
0 |
777 |
735 |
2209 |
509 |
3 |
0 |
| CDI |
0 |
0 |
1763 |
1031 |
1734 |
7209 |
1591 |
0 |
| VCDI |
0 |
0 |
6260 |
2430 |
1146 |
3582 |
4716 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
108765 |
10217 |
12883 |
382 |
1 |
0 |
0 |
0 |
| OW |
2318 |
1501 |
2115 |
754 |
91 |
11 |
0 |
0 |
| VODI |
1494 |
150 |
1257 |
2110 |
927 |
112 |
0 |
0 |
| ODI |
0 |
0 |
778 |
720 |
2444 |
601 |
3 |
0 |
| CDI |
0 |
0 |
1685 |
1109 |
1538 |
6930 |
1705 |
0 |
| VCDI |
0 |
0 |
6299 |
2393 |
1147 |
3768 |
4602 |
0 |
|
Date: 2025-09-20:
| 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 |
117636 |
13504 |
155 |
116 |
3 |
0 |
0 |
0 |
| OW |
2291 |
3231 |
741 |
773 |
121 |
4 |
0 |
0 |
| VODI |
1541 |
349 |
365 |
1934 |
1497 |
234 |
0 |
0 |
| ODI |
0 |
72 |
42 |
315 |
1637 |
2250 |
60 |
0 |
| CDI |
0 |
28 |
30 |
169 |
779 |
7677 |
3283 |
3 |
| VCDI |
0 |
0 |
1 |
9 |
48 |
5982 |
11993 |
1937 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
117643 |
13818 |
203 |
145 |
7 |
0 |
0 |
0 |
| OW |
2291 |
2915 |
679 |
748 |
145 |
5 |
0 |
0 |
| VODI |
1534 |
355 |
384 |
1883 |
1465 |
306 |
0 |
0 |
| ODI |
0 |
65 |
37 |
348 |
1656 |
2245 |
165 |
0 |
| CDI |
0 |
29 |
30 |
174 |
758 |
7517 |
3011 |
6 |
| VCDI |
0 |
2 |
1 |
18 |
54 |
6074 |
12160 |
1934 |
|
Date: 2025-09-22:
| 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 |
108515 |
8670 |
14829 |
35 |
0 |
0 |
0 |
0 |
| OW |
2197 |
869 |
2693 |
349 |
2 |
0 |
0 |
0 |
| VODI |
1644 |
11 |
2006 |
1242 |
312 |
10 |
0 |
0 |
| ODI |
0 |
0 |
2026 |
692 |
871 |
137 |
0 |
0 |
| CDI |
0 |
0 |
2488 |
1597 |
1199 |
2162 |
82 |
0 |
| VCDI |
0 |
0 |
4950 |
2840 |
1697 |
3220 |
13106 |
359 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
108523 |
8253 |
14793 |
55 |
6 |
0 |
0 |
0 |
| OW |
2236 |
1027 |
2744 |
424 |
99 |
10 |
0 |
0 |
| VODI |
1597 |
258 |
2148 |
1019 |
574 |
196 |
2 |
0 |
| ODI |
0 |
12 |
2168 |
1001 |
762 |
345 |
40 |
0 |
| CDI |
0 |
0 |
2250 |
1448 |
943 |
1713 |
847 |
0 |
| VCDI |
0 |
0 |
4889 |
2808 |
1697 |
3265 |
12299 |
359 |
|
Date: 2025-09-24:
| 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 |
116645 |
14849 |
170 |
93 |
5 |
1 |
0 |
0 |
| OW |
2222 |
2125 |
583 |
869 |
199 |
4 |
0 |
0 |
| VODI |
1696 |
307 |
203 |
1139 |
1391 |
314 |
4 |
0 |
| ODI |
0 |
33 |
24 |
302 |
1147 |
1570 |
273 |
0 |
| CDI |
0 |
18 |
20 |
125 |
847 |
3974 |
2231 |
0 |
| VCDI |
0 |
0 |
1 |
8 |
28 |
2400 |
20371 |
4619 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
116578 |
14047 |
179 |
138 |
16 |
0 |
0 |
0 |
| OW |
2338 |
2682 |
451 |
796 |
361 |
60 |
0 |
0 |
| VODI |
1647 |
541 |
289 |
975 |
1469 |
600 |
46 |
0 |
| ODI |
0 |
44 |
66 |
471 |
979 |
2395 |
646 |
0 |
| CDI |
0 |
17 |
15 |
149 |
745 |
3127 |
3204 |
0 |
| VCDI |
0 |
1 |
1 |
7 |
47 |
2081 |
18983 |
4619 |
|
Date: 2025-09-26:
| 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 |
116418 |
13761 |
180 |
98 |
9 |
0 |
0 |
0 |
| OW |
2186 |
2560 |
480 |
798 |
324 |
59 |
0 |
0 |
| VODI |
1886 |
342 |
223 |
733 |
1137 |
760 |
32 |
0 |
| ODI |
0 |
34 |
30 |
298 |
692 |
1428 |
416 |
0 |
| CDI |
0 |
4 |
11 |
144 |
831 |
3151 |
2495 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
42 |
2401 |
18603 |
8244 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
116556 |
13234 |
176 |
150 |
50 |
5 |
0 |
0 |
| OW |
2336 |
2798 |
408 |
743 |
545 |
284 |
4 |
0 |
| VODI |
1598 |
575 |
243 |
598 |
905 |
1275 |
316 |
0 |
| ODI |
0 |
85 |
81 |
388 |
641 |
1573 |
1292 |
0 |
| CDI |
0 |
9 |
16 |
180 |
814 |
2467 |
3081 |
0 |
| VCDI |
0 |
0 |
0 |
12 |
80 |
2195 |
16853 |
8244 |
|
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