Validation of sea ice concentration - Full domain
Bulletin date: 2025-09-18
Data source: OSI SAF N.H. multi-product 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 |
133472 |
12832 |
61 |
27 |
0 |
0 |
0 |
0 |
| OW |
746 |
4053 |
813 |
1256 |
98 |
0 |
0 |
0 |
| VODI |
14 |
197 |
257 |
4656 |
1541 |
39 |
0 |
0 |
| ODI |
0 |
11 |
4 |
370 |
5386 |
949 |
0 |
0 |
| CDI |
0 |
2 |
0 |
5 |
2904 |
13552 |
301 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
18 |
7742 |
3437 |
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 |
133552 |
12838 |
73 |
48 |
0 |
0 |
0 |
0 |
| OW |
534 |
4139 |
735 |
1126 |
94 |
3 |
0 |
0 |
| VODI |
24 |
352 |
390 |
3805 |
1945 |
48 |
0 |
0 |
| ODI |
0 |
11 |
2 |
520 |
4520 |
1084 |
0 |
0 |
| CDI |
0 |
1 |
1 |
13 |
1906 |
11913 |
150 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
23 |
10004 |
4889 |
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 |
134733 |
14184 |
154 |
81 |
0 |
0 |
0 |
0 |
| OW |
69 |
2580 |
930 |
1459 |
22 |
0 |
0 |
0 |
| VODI |
0 |
47 |
58 |
3394 |
1150 |
2 |
0 |
0 |
| ODI |
0 |
0 |
0 |
190 |
4124 |
89 |
0 |
0 |
| CDI |
0 |
0 |
0 |
14 |
2246 |
12693 |
191 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
113 |
9760 |
6460 |
0 |
|
...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 |
134563 |
14263 |
184 |
137 |
5 |
1 |
0 |
0 |
| OW |
47 |
2432 |
773 |
1451 |
234 |
7 |
0 |
0 |
| VODI |
0 |
141 |
157 |
2609 |
1663 |
98 |
0 |
0 |
| ODI |
0 |
8 |
9 |
280 |
2696 |
1292 |
0 |
0 |
| CDI |
0 |
0 |
3 |
85 |
1249 |
11849 |
231 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
111 |
10982 |
7170 |
13 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
134566 |
14503 |
261 |
220 |
2 |
3 |
0 |
0 |
| OW |
44 |
2166 |
685 |
1408 |
253 |
7 |
0 |
0 |
| VODI |
0 |
164 |
162 |
2548 |
1639 |
102 |
0 |
0 |
| ODI |
0 |
11 |
16 |
303 |
2789 |
1481 |
0 |
0 |
| CDI |
0 |
0 |
2 |
83 |
1165 |
11443 |
363 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
110 |
11193 |
7038 |
13 |
|
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 |
135266 |
13219 |
149 |
97 |
0 |
0 |
0 |
0 |
| OW |
89 |
2837 |
704 |
1228 |
122 |
0 |
0 |
0 |
| VODI |
0 |
217 |
207 |
2165 |
1770 |
78 |
0 |
0 |
| ODI |
0 |
20 |
17 |
383 |
1962 |
2044 |
2 |
0 |
| CDI |
0 |
1 |
7 |
166 |
1337 |
9403 |
1156 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
111 |
12183 |
7375 |
424 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
135268 |
13487 |
204 |
167 |
5 |
0 |
0 |
0 |
| OW |
85 |
2560 |
637 |
1149 |
166 |
0 |
0 |
0 |
| VODI |
2 |
228 |
218 |
2138 |
1725 |
141 |
0 |
0 |
| ODI |
0 |
18 |
19 |
374 |
1997 |
2131 |
23 |
0 |
| CDI |
0 |
1 |
6 |
209 |
1282 |
9196 |
936 |
0 |
| VCDI |
0 |
0 |
0 |
6 |
127 |
12240 |
7574 |
424 |
|
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 |
134820 |
14145 |
299 |
130 |
5 |
0 |
0 |
0 |
| OW |
78 |
1827 |
525 |
1373 |
194 |
0 |
0 |
0 |
| VODI |
0 |
273 |
114 |
1416 |
1537 |
300 |
0 |
0 |
| ODI |
0 |
24 |
8 |
335 |
1655 |
1743 |
12 |
0 |
| CDI |
0 |
4 |
0 |
94 |
1468 |
5823 |
248 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
78 |
9002 |
16095 |
1115 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
134797 |
13692 |
237 |
200 |
22 |
0 |
0 |
0 |
| OW |
100 |
2278 |
502 |
1137 |
392 |
0 |
0 |
0 |
| VODI |
1 |
273 |
184 |
1418 |
1705 |
665 |
8 |
0 |
| ODI |
0 |
18 |
23 |
455 |
1353 |
2428 |
101 |
0 |
| CDI |
0 |
12 |
0 |
135 |
1301 |
5112 |
760 |
0 |
| VCDI |
0 |
0 |
0 |
6 |
164 |
8663 |
15486 |
1115 |
|
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 |
135147 |
13562 |
265 |
132 |
0 |
0 |
0 |
0 |
| OW |
309 |
1703 |
577 |
1236 |
97 |
0 |
0 |
0 |
| VODI |
43 |
269 |
128 |
1513 |
1391 |
80 |
0 |
0 |
| ODI |
0 |
30 |
17 |
362 |
1627 |
1372 |
6 |
0 |
| CDI |
0 |
11 |
2 |
129 |
1522 |
4732 |
972 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
60 |
6979 |
17862 |
2604 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
134996 |
12853 |
213 |
210 |
3 |
0 |
0 |
0 |
| OW |
451 |
2360 |
455 |
970 |
336 |
6 |
0 |
0 |
| VODI |
52 |
323 |
293 |
1403 |
1527 |
395 |
0 |
0 |
| ODI |
0 |
28 |
27 |
643 |
1347 |
2474 |
140 |
0 |
| CDI |
0 |
11 |
1 |
146 |
1385 |
4178 |
1682 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
99 |
6110 |
17018 |
2604 |
|
Date: 2025-09-26:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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