Validation of sea ice concentration - American sector
Bulletin date: 2025-07-10
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-07-04:
| 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 |
18543 |
1880 |
1461 |
34 |
12 |
1 |
0 |
0 |
| OW |
489 |
1842 |
842 |
1335 |
53 |
13 |
0 |
0 |
| VODI |
75 |
115 |
617 |
945 |
331 |
50 |
0 |
0 |
| ODI |
8 |
36 |
506 |
1066 |
912 |
428 |
0 |
0 |
| CDI |
2 |
0 |
788 |
2203 |
2334 |
3498 |
115 |
0 |
| VCDI |
0 |
0 |
106 |
774 |
3237 |
10754 |
3976 |
1850 |
|
...date precedes bulletin
|
Date: 2025-07-06:
| 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 |
18613 |
4348 |
51 |
70 |
4 |
0 |
0 |
0 |
| OW |
151 |
2597 |
243 |
908 |
83 |
4 |
0 |
0 |
| VODI |
19 |
194 |
84 |
1038 |
522 |
40 |
0 |
0 |
| ODI |
0 |
35 |
10 |
444 |
2199 |
202 |
0 |
0 |
| CDI |
0 |
0 |
0 |
77 |
3729 |
4838 |
25 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
2878 |
12775 |
4926 |
122 |
|
...date precedes bulletin
|
Date: 2025-07-08:
| 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 |
20389 |
4874 |
88 |
141 |
1 |
0 |
0 |
0 |
| OW |
130 |
911 |
214 |
868 |
40 |
0 |
0 |
0 |
| VODI |
14 |
63 |
42 |
1155 |
640 |
10 |
0 |
0 |
| ODI |
0 |
3 |
0 |
82 |
4172 |
278 |
0 |
0 |
| CDI |
0 |
0 |
1 |
40 |
3244 |
14502 |
150 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
696 |
4734 |
3747 |
2 |
|
...date precedes bulletin
|
Date: 2025-07-10:
| 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 |
20761 |
4617 |
30 |
112 |
6 |
0 |
0 |
0 |
| OW |
82 |
1047 |
169 |
773 |
73 |
0 |
0 |
0 |
| VODI |
9 |
136 |
30 |
969 |
878 |
15 |
0 |
0 |
| ODI |
0 |
7 |
1 |
67 |
3622 |
648 |
0 |
0 |
| CDI |
0 |
0 |
0 |
76 |
5401 |
14132 |
386 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
710 |
1941 |
4531 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
20732 |
4641 |
37 |
104 |
4 |
0 |
0 |
0 |
| OW |
112 |
1020 |
157 |
756 |
56 |
0 |
0 |
0 |
| VODI |
8 |
138 |
35 |
989 |
870 |
17 |
0 |
0 |
| ODI |
0 |
8 |
1 |
69 |
3616 |
801 |
0 |
0 |
| CDI |
0 |
0 |
0 |
76 |
5456 |
13915 |
467 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
688 |
2003 |
4450 |
0 |
|
Date: 2025-07-12:
| 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 |
21621 |
3950 |
13 |
61 |
4 |
0 |
0 |
0 |
| OW |
56 |
1527 |
165 |
354 |
20 |
3 |
0 |
0 |
| VODI |
8 |
205 |
62 |
1021 |
790 |
80 |
0 |
0 |
| ODI |
0 |
21 |
1 |
155 |
2196 |
1584 |
222 |
0 |
| CDI |
0 |
15 |
3 |
58 |
1833 |
17559 |
2048 |
1 |
| VCDI |
0 |
0 |
0 |
19 |
762 |
2008 |
2802 |
4 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
21612 |
3982 |
15 |
56 |
1 |
0 |
0 |
0 |
| OW |
68 |
1480 |
142 |
341 |
16 |
0 |
0 |
0 |
| VODI |
5 |
216 |
80 |
1039 |
833 |
102 |
0 |
0 |
| ODI |
0 |
29 |
4 |
151 |
2067 |
1780 |
263 |
0 |
| CDI |
0 |
11 |
3 |
58 |
1921 |
17352 |
2110 |
0 |
| VCDI |
0 |
0 |
0 |
23 |
767 |
2000 |
2699 |
5 |
|
Date: 2025-07-14:
| 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 |
21195 |
5305 |
74 |
100 |
3 |
0 |
0 |
0 |
| OW |
35 |
1058 |
178 |
718 |
35 |
1 |
0 |
0 |
| VODI |
2 |
41 |
24 |
972 |
701 |
10 |
0 |
0 |
| ODI |
0 |
2 |
2 |
96 |
5267 |
379 |
0 |
0 |
| CDI |
0 |
1 |
0 |
36 |
2986 |
16280 |
845 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
646 |
937 |
3295 |
5 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
21167 |
4687 |
34 |
68 |
3 |
0 |
0 |
0 |
| OW |
61 |
1468 |
153 |
400 |
37 |
4 |
0 |
0 |
| VODI |
4 |
197 |
78 |
1100 |
875 |
41 |
0 |
0 |
| ODI |
0 |
29 |
5 |
284 |
2917 |
790 |
0 |
0 |
| CDI |
0 |
24 |
7 |
53 |
5108 |
15377 |
2365 |
5 |
| VCDI |
0 |
2 |
1 |
19 |
698 |
1395 |
1775 |
0 |
|
Date: 2025-07-16:
| 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 |
23783 |
3094 |
18 |
67 |
1 |
0 |
0 |
0 |
| OW |
462 |
603 |
227 |
613 |
35 |
0 |
0 |
0 |
| VODI |
13 |
32 |
30 |
1206 |
816 |
4 |
0 |
0 |
| ODI |
0 |
6 |
4 |
119 |
5394 |
240 |
0 |
0 |
| CDI |
0 |
2 |
1 |
40 |
4709 |
13639 |
1378 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
781 |
2072 |
1830 |
12 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23532 |
2422 |
26 |
111 |
11 |
0 |
0 |
0 |
| OW |
688 |
1080 |
142 |
334 |
53 |
0 |
0 |
0 |
| VODI |
38 |
174 |
91 |
1191 |
831 |
11 |
0 |
0 |
| ODI |
0 |
40 |
4 |
357 |
3590 |
85 |
6 |
0 |
| CDI |
0 |
20 |
14 |
37 |
6434 |
14104 |
1696 |
1 |
| VCDI |
0 |
1 |
3 |
15 |
817 |
1755 |
1506 |
11 |
|
Date: 2025-07-18:
| 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 |
24305 |
2892 |
36 |
46 |
3 |
0 |
0 |
0 |
| OW |
349 |
627 |
193 |
648 |
48 |
1 |
0 |
0 |
| VODI |
1 |
51 |
26 |
1177 |
1223 |
9 |
0 |
0 |
| ODI |
0 |
18 |
4 |
109 |
3930 |
1127 |
0 |
0 |
| CDI |
0 |
24 |
0 |
49 |
3964 |
14110 |
2393 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
660 |
1531 |
1674 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23984 |
2310 |
27 |
101 |
11 |
0 |
0 |
0 |
| OW |
654 |
1029 |
159 |
561 |
120 |
3 |
0 |
0 |
| VODI |
17 |
188 |
58 |
939 |
1199 |
33 |
0 |
0 |
| ODI |
0 |
32 |
9 |
372 |
3125 |
406 |
6 |
0 |
| CDI |
0 |
41 |
6 |
32 |
4608 |
14297 |
2533 |
0 |
| VCDI |
0 |
12 |
0 |
27 |
765 |
2039 |
1528 |
0 |
|
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