Validation of sea ice concentration - Full domain
Bulletin date: 2025-07-03
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-06-27:
| 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 |
74763 |
17082 |
141 |
120 |
19 |
1 |
0 |
0 |
| OW |
1223 |
5242 |
643 |
594 |
69 |
13 |
1 |
0 |
| VODI |
3192 |
1410 |
854 |
2417 |
1143 |
195 |
34 |
0 |
| ODI |
0 |
160 |
184 |
1989 |
3028 |
1297 |
125 |
0 |
| CDI |
0 |
64 |
74 |
693 |
3745 |
13062 |
2964 |
1 |
| VCDI |
0 |
0 |
1 |
45 |
1587 |
19679 |
19800 |
3156 |
|
...date precedes bulletin
|
Date: 2025-06-29:
| 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 |
76545 |
16539 |
131 |
96 |
12 |
5 |
0 |
0 |
| OW |
1292 |
5001 |
637 |
606 |
129 |
20 |
3 |
0 |
| VODI |
3177 |
1652 |
761 |
2484 |
1034 |
284 |
29 |
0 |
| ODI |
0 |
378 |
313 |
1942 |
2575 |
1369 |
162 |
0 |
| CDI |
0 |
81 |
96 |
729 |
4382 |
12667 |
2319 |
0 |
| VCDI |
0 |
0 |
1 |
25 |
2174 |
20219 |
19871 |
1070 |
|
...date precedes bulletin
|
Date: 2025-07-01:
| 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 |
78298 |
17749 |
144 |
92 |
8 |
1 |
1 |
0 |
| OW |
1216 |
5090 |
1263 |
1226 |
83 |
7 |
1 |
0 |
| VODI |
3117 |
366 |
556 |
3266 |
1205 |
74 |
7 |
0 |
| ODI |
0 |
22 |
58 |
766 |
4530 |
1223 |
38 |
0 |
| CDI |
0 |
7 |
14 |
185 |
5602 |
15786 |
1826 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
1057 |
15276 |
18034 |
2613 |
|
...date precedes bulletin
|
Date: 2025-07-03:
| 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 |
79553 |
17149 |
154 |
104 |
22 |
3 |
0 |
0 |
| OW |
1307 |
5327 |
1158 |
1143 |
151 |
44 |
3 |
0 |
| VODI |
2955 |
887 |
609 |
2314 |
1293 |
129 |
6 |
0 |
| ODI |
0 |
108 |
102 |
1028 |
4855 |
1487 |
37 |
0 |
| CDI |
0 |
27 |
65 |
364 |
6787 |
13438 |
995 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
2004 |
16925 |
17859 |
416 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
79532 |
17380 |
170 |
110 |
27 |
16 |
0 |
0 |
| OW |
1323 |
5091 |
1139 |
1098 |
130 |
34 |
3 |
0 |
| VODI |
2960 |
898 |
609 |
2285 |
1259 |
131 |
6 |
0 |
| ODI |
0 |
109 |
111 |
1094 |
4778 |
1408 |
38 |
0 |
| CDI |
0 |
20 |
59 |
366 |
6862 |
13160 |
1149 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
2056 |
17277 |
17704 |
416 |
|
Date: 2025-07-05:
| 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 |
78398 |
18673 |
268 |
197 |
30 |
15 |
0 |
0 |
| OW |
1388 |
5720 |
971 |
986 |
190 |
44 |
1 |
0 |
| VODI |
2947 |
947 |
630 |
2187 |
1299 |
202 |
11 |
1 |
| ODI |
0 |
194 |
143 |
1317 |
5069 |
1199 |
38 |
11 |
| CDI |
0 |
68 |
74 |
530 |
6927 |
11540 |
1081 |
11 |
| VCDI |
0 |
0 |
2 |
16 |
3857 |
19568 |
13767 |
293 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
78357 |
18912 |
283 |
224 |
45 |
28 |
0 |
0 |
| OW |
1428 |
5505 |
940 |
971 |
184 |
45 |
2 |
0 |
| VODI |
2948 |
933 |
638 |
2035 |
1262 |
196 |
10 |
0 |
| ODI |
0 |
197 |
149 |
1482 |
4882 |
1128 |
36 |
12 |
| CDI |
0 |
55 |
76 |
508 |
7164 |
11479 |
1296 |
12 |
| VCDI |
0 |
0 |
2 |
13 |
3835 |
19692 |
13554 |
292 |
|
Date: 2025-07-07:
| 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 |
79743 |
21838 |
222 |
155 |
21 |
0 |
0 |
0 |
| OW |
1395 |
3949 |
1254 |
942 |
82 |
17 |
1 |
0 |
| VODI |
2855 |
117 |
327 |
3489 |
1415 |
36 |
3 |
0 |
| ODI |
0 |
25 |
38 |
538 |
7653 |
1091 |
9 |
0 |
| CDI |
0 |
1 |
2 |
60 |
5852 |
24156 |
399 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
623 |
9882 |
12030 |
589 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
79583 |
19302 |
197 |
158 |
50 |
28 |
3 |
0 |
| OW |
1496 |
4945 |
602 |
895 |
238 |
57 |
3 |
0 |
| VODI |
2914 |
1253 |
714 |
1904 |
1155 |
196 |
7 |
0 |
| ODI |
0 |
292 |
238 |
1696 |
4186 |
1318 |
36 |
0 |
| CDI |
0 |
138 |
90 |
517 |
7053 |
13664 |
1162 |
0 |
| VCDI |
0 |
0 |
2 |
15 |
2964 |
19919 |
11231 |
589 |
|
Date: 2025-07-09:
| 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 |
84012 |
18364 |
176 |
127 |
14 |
1 |
0 |
0 |
| OW |
1473 |
3914 |
897 |
810 |
145 |
20 |
1 |
0 |
| VODI |
2836 |
597 |
697 |
3094 |
1406 |
72 |
1 |
0 |
| ODI |
0 |
44 |
84 |
765 |
5411 |
2158 |
23 |
0 |
| CDI |
0 |
8 |
16 |
257 |
6826 |
24501 |
894 |
0 |
| VCDI |
0 |
0 |
0 |
12 |
4505 |
12183 |
4466 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
83486 |
16340 |
156 |
143 |
42 |
2 |
0 |
0 |
| OW |
1925 |
4235 |
499 |
724 |
274 |
56 |
1 |
0 |
| VODI |
2910 |
1776 |
774 |
1908 |
1170 |
195 |
4 |
0 |
| ODI |
0 |
419 |
304 |
1540 |
3442 |
1524 |
46 |
0 |
| CDI |
0 |
153 |
135 |
698 |
6086 |
17139 |
1121 |
0 |
| VCDI |
0 |
4 |
2 |
52 |
7293 |
20019 |
4213 |
0 |
|
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 |
84554 |
17569 |
224 |
186 |
22 |
0 |
0 |
0 |
| OW |
1419 |
4265 |
760 |
838 |
132 |
10 |
0 |
0 |
| VODI |
2813 |
999 |
740 |
2977 |
1610 |
78 |
6 |
0 |
| ODI |
0 |
123 |
153 |
1076 |
4870 |
2196 |
18 |
0 |
| CDI |
0 |
66 |
51 |
317 |
9560 |
24754 |
1154 |
0 |
| VCDI |
0 |
0 |
0 |
10 |
795 |
12637 |
3828 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
84172 |
15846 |
232 |
203 |
15 |
0 |
0 |
0 |
| OW |
1738 |
4184 |
513 |
884 |
246 |
20 |
0 |
0 |
| VODI |
2876 |
2090 |
756 |
2145 |
1314 |
105 |
3 |
0 |
| ODI |
0 |
583 |
235 |
1396 |
3643 |
1357 |
71 |
0 |
| CDI |
0 |
313 |
184 |
748 |
9481 |
19557 |
966 |
0 |
| VCDI |
0 |
6 |
8 |
28 |
2290 |
18636 |
3966 |
0 |
|
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