Validation of sea ice concentration - American sector
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 |
32416 |
4299 |
24 |
10 |
0 |
0 |
0 |
0 |
| OW |
738 |
2654 |
321 |
441 |
48 |
0 |
0 |
0 |
| VODI |
14 |
152 |
162 |
2379 |
599 |
27 |
0 |
0 |
| ODI |
0 |
11 |
4 |
244 |
3170 |
234 |
0 |
0 |
| CDI |
0 |
2 |
0 |
2 |
2154 |
3858 |
8 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
5476 |
1784 |
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 |
32440 |
4520 |
31 |
28 |
0 |
0 |
0 |
0 |
| OW |
528 |
2715 |
261 |
302 |
35 |
3 |
0 |
0 |
| VODI |
24 |
276 |
241 |
1762 |
809 |
31 |
0 |
0 |
| ODI |
0 |
11 |
1 |
408 |
2925 |
291 |
0 |
0 |
| CDI |
0 |
1 |
1 |
4 |
1320 |
3836 |
114 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
5323 |
2990 |
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 |
32669 |
6113 |
68 |
51 |
0 |
0 |
0 |
0 |
| OW |
69 |
1798 |
395 |
633 |
13 |
0 |
0 |
0 |
| VODI |
0 |
44 |
37 |
1682 |
670 |
2 |
0 |
0 |
| ODI |
0 |
0 |
0 |
83 |
2641 |
43 |
0 |
0 |
| CDI |
0 |
0 |
0 |
6 |
1203 |
3813 |
7 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
83 |
5678 |
3430 |
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 |
32467 |
6282 |
64 |
72 |
5 |
1 |
0 |
0 |
| OW |
47 |
1543 |
346 |
767 |
143 |
6 |
0 |
0 |
| VODI |
0 |
96 |
87 |
1173 |
1073 |
26 |
0 |
0 |
| ODI |
0 |
0 |
4 |
115 |
1526 |
1061 |
0 |
0 |
| CDI |
0 |
0 |
0 |
47 |
731 |
4126 |
101 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
37 |
4562 |
4723 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
32471 |
6520 |
102 |
129 |
2 |
3 |
0 |
0 |
| OW |
43 |
1269 |
296 |
755 |
163 |
5 |
0 |
0 |
| VODI |
0 |
129 |
94 |
1126 |
1081 |
31 |
0 |
0 |
| ODI |
0 |
3 |
9 |
116 |
1602 |
1250 |
0 |
0 |
| CDI |
0 |
0 |
0 |
48 |
639 |
3821 |
114 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
28 |
4672 |
4710 |
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 |
32942 |
5567 |
64 |
56 |
0 |
0 |
0 |
0 |
| OW |
89 |
1832 |
318 |
552 |
50 |
0 |
0 |
0 |
| VODI |
0 |
129 |
102 |
1050 |
958 |
20 |
0 |
0 |
| ODI |
0 |
1 |
4 |
215 |
1021 |
1522 |
2 |
0 |
| CDI |
0 |
0 |
0 |
123 |
740 |
3296 |
166 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
84 |
4987 |
4998 |
339 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
32946 |
5743 |
81 |
99 |
5 |
0 |
0 |
0 |
| OW |
83 |
1621 |
288 |
489 |
84 |
0 |
0 |
0 |
| VODI |
2 |
164 |
111 |
1050 |
961 |
82 |
0 |
0 |
| ODI |
0 |
1 |
8 |
197 |
1008 |
1635 |
23 |
0 |
| CDI |
0 |
0 |
0 |
159 |
696 |
3099 |
163 |
0 |
| VCDI |
0 |
0 |
0 |
6 |
99 |
5009 |
4980 |
339 |
|
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 |
33248 |
5433 |
79 |
48 |
5 |
0 |
0 |
0 |
| OW |
78 |
1404 |
203 |
531 |
141 |
0 |
0 |
0 |
| VODI |
0 |
267 |
82 |
648 |
920 |
230 |
0 |
0 |
| ODI |
0 |
24 |
8 |
210 |
770 |
1475 |
0 |
0 |
| CDI |
0 |
4 |
0 |
92 |
745 |
3968 |
193 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
36 |
4709 |
4847 |
830 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
33225 |
5345 |
61 |
75 |
20 |
0 |
0 |
0 |
| OW |
100 |
1593 |
223 |
468 |
191 |
0 |
0 |
0 |
| VODI |
1 |
167 |
84 |
684 |
906 |
353 |
0 |
0 |
| ODI |
0 |
15 |
4 |
228 |
746 |
1774 |
29 |
0 |
| CDI |
0 |
12 |
0 |
71 |
696 |
3400 |
159 |
0 |
| VCDI |
0 |
0 |
0 |
6 |
58 |
4855 |
4852 |
830 |
|
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 |
34234 |
4348 |
71 |
37 |
0 |
0 |
0 |
0 |
| OW |
309 |
1311 |
186 |
483 |
80 |
0 |
0 |
0 |
| VODI |
43 |
267 |
112 |
686 |
855 |
60 |
0 |
0 |
| ODI |
0 |
30 |
17 |
226 |
755 |
1167 |
6 |
0 |
| CDI |
0 |
11 |
2 |
129 |
802 |
3111 |
810 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
31 |
3607 |
6298 |
1143 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
34083 |
4207 |
44 |
34 |
1 |
0 |
0 |
0 |
| OW |
451 |
1512 |
214 |
408 |
132 |
4 |
0 |
0 |
| VODI |
52 |
209 |
117 |
702 |
901 |
195 |
0 |
0 |
| ODI |
0 |
28 |
12 |
315 |
665 |
1843 |
122 |
0 |
| CDI |
0 |
11 |
1 |
102 |
800 |
2815 |
994 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
24 |
3088 |
5998 |
1143 |
|
Date: 2025-09-26:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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