Validation of sea ice concentration - American sector
Bulletin date: 2025-06-19
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-06-13:
| 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 |
12632 |
2386 |
66 |
97 |
8 |
1 |
0 |
0 |
| OW |
102 |
1279 |
213 |
531 |
66 |
3 |
0 |
0 |
| VODI |
2 |
560 |
187 |
1334 |
611 |
73 |
5 |
0 |
| ODI |
0 |
35 |
52 |
573 |
1185 |
437 |
40 |
0 |
| CDI |
0 |
28 |
13 |
175 |
1491 |
3870 |
914 |
9 |
| VCDI |
0 |
0 |
0 |
12 |
1125 |
8994 |
11617 |
10505 |
|
...date precedes bulletin
|
Date: 2025-06-15:
| 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 |
12795 |
2548 |
46 |
29 |
6 |
0 |
0 |
0 |
| OW |
111 |
1491 |
230 |
592 |
136 |
2 |
0 |
0 |
| VODI |
3 |
697 |
146 |
975 |
819 |
68 |
0 |
0 |
| ODI |
0 |
75 |
69 |
542 |
1003 |
597 |
16 |
0 |
| CDI |
0 |
31 |
23 |
216 |
1157 |
4231 |
889 |
0 |
| VCDI |
0 |
0 |
0 |
10 |
3192 |
10822 |
11327 |
6337 |
|
...date precedes bulletin
|
Date: 2025-06-17:
| 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 |
13131 |
3192 |
65 |
39 |
13 |
3 |
0 |
0 |
| OW |
52 |
1975 |
318 |
448 |
68 |
0 |
0 |
0 |
| VODI |
5 |
192 |
153 |
1264 |
511 |
13 |
0 |
0 |
| ODI |
0 |
11 |
4 |
337 |
1253 |
274 |
10 |
0 |
| CDI |
0 |
0 |
0 |
79 |
1610 |
5671 |
595 |
38 |
| VCDI |
0 |
0 |
0 |
0 |
2420 |
8059 |
9565 |
9863 |
|
...date precedes bulletin
|
Date: 2025-06-19:
| 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 |
13695 |
2976 |
31 |
73 |
4 |
0 |
0 |
0 |
| OW |
163 |
2051 |
233 |
335 |
74 |
0 |
0 |
0 |
| VODI |
29 |
377 |
182 |
1149 |
391 |
66 |
7 |
0 |
| ODI |
2 |
6 |
12 |
487 |
1380 |
510 |
34 |
0 |
| CDI |
0 |
0 |
0 |
82 |
1398 |
4200 |
1354 |
64 |
| VCDI |
0 |
0 |
0 |
1 |
1675 |
8939 |
12386 |
6865 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13692 |
3169 |
38 |
89 |
12 |
0 |
0 |
0 |
| OW |
163 |
1841 |
216 |
327 |
83 |
4 |
0 |
0 |
| VODI |
32 |
386 |
181 |
1120 |
333 |
47 |
6 |
0 |
| ODI |
2 |
14 |
23 |
501 |
1335 |
372 |
35 |
0 |
| CDI |
0 |
0 |
0 |
87 |
1478 |
4474 |
1473 |
105 |
| VCDI |
0 |
0 |
0 |
3 |
1681 |
8818 |
12267 |
6824 |
|
Date: 2025-06-21:
| 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 |
13893 |
3286 |
23 |
52 |
35 |
0 |
0 |
0 |
| OW |
338 |
1784 |
152 |
329 |
98 |
3 |
0 |
0 |
| VODI |
27 |
538 |
207 |
1090 |
234 |
48 |
9 |
0 |
| ODI |
2 |
36 |
33 |
738 |
1945 |
225 |
31 |
0 |
| CDI |
0 |
0 |
0 |
149 |
2021 |
3339 |
720 |
31 |
| VCDI |
0 |
0 |
0 |
0 |
2797 |
11880 |
8668 |
6470 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13881 |
3364 |
33 |
75 |
56 |
0 |
0 |
0 |
| OW |
337 |
1679 |
135 |
351 |
85 |
3 |
0 |
0 |
| VODI |
40 |
561 |
205 |
970 |
214 |
47 |
8 |
0 |
| ODI |
2 |
40 |
41 |
771 |
1694 |
210 |
27 |
0 |
| CDI |
0 |
0 |
1 |
191 |
2282 |
3713 |
766 |
53 |
| VCDI |
0 |
0 |
0 |
0 |
2799 |
11522 |
8627 |
6448 |
|
Date: 2025-06-23:
| 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 |
14599 |
4194 |
26 |
59 |
4 |
0 |
0 |
0 |
| OW |
118 |
1350 |
308 |
367 |
26 |
2 |
0 |
0 |
| VODI |
7 |
117 |
41 |
1572 |
343 |
25 |
3 |
0 |
| ODI |
4 |
0 |
0 |
275 |
2967 |
419 |
11 |
0 |
| CDI |
0 |
0 |
0 |
71 |
697 |
8355 |
182 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
877 |
9621 |
6771 |
7819 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14397 |
3426 |
27 |
102 |
14 |
0 |
0 |
0 |
| OW |
298 |
1606 |
136 |
425 |
55 |
12 |
0 |
0 |
| VODI |
29 |
588 |
164 |
754 |
405 |
61 |
14 |
0 |
| ODI |
4 |
38 |
33 |
722 |
1683 |
398 |
27 |
0 |
| CDI |
0 |
3 |
15 |
342 |
1814 |
4954 |
256 |
140 |
| VCDI |
0 |
0 |
0 |
0 |
943 |
12997 |
6670 |
7679 |
|
Date: 2025-06-25:
| 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 |
15627 |
3584 |
22 |
80 |
4 |
0 |
0 |
0 |
| OW |
108 |
1456 |
251 |
310 |
48 |
9 |
0 |
0 |
| VODI |
11 |
331 |
147 |
1233 |
533 |
55 |
3 |
0 |
| ODI |
4 |
3 |
2 |
554 |
2680 |
393 |
11 |
0 |
| CDI |
0 |
3 |
1 |
111 |
1514 |
6706 |
115 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
4173 |
11758 |
6554 |
2837 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15472 |
2919 |
12 |
107 |
2 |
0 |
0 |
0 |
| OW |
254 |
1631 |
158 |
283 |
51 |
12 |
0 |
0 |
| VODI |
20 |
757 |
190 |
815 |
403 |
75 |
10 |
0 |
| ODI |
4 |
57 |
48 |
735 |
1992 |
296 |
29 |
0 |
| CDI |
0 |
13 |
15 |
347 |
2249 |
4238 |
504 |
36 |
| VCDI |
0 |
0 |
0 |
1 |
4255 |
14300 |
6140 |
2801 |
|
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 |
15980 |
3632 |
10 |
89 |
7 |
0 |
0 |
0 |
| OW |
107 |
1660 |
176 |
296 |
81 |
10 |
0 |
0 |
| VODI |
16 |
540 |
140 |
1222 |
680 |
72 |
1 |
0 |
| ODI |
3 |
21 |
18 |
1347 |
1651 |
386 |
7 |
0 |
| CDI |
0 |
36 |
3 |
250 |
1295 |
6906 |
34 |
0 |
| VCDI |
0 |
1 |
0 |
0 |
1150 |
15782 |
4456 |
3166 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15875 |
2993 |
7 |
48 |
6 |
0 |
0 |
0 |
| OW |
207 |
1750 |
95 |
245 |
40 |
1 |
0 |
0 |
| VODI |
21 |
970 |
144 |
822 |
471 |
82 |
3 |
0 |
| ODI |
3 |
108 |
75 |
1305 |
1545 |
321 |
15 |
0 |
| CDI |
0 |
68 |
26 |
784 |
1547 |
4898 |
576 |
125 |
| VCDI |
0 |
1 |
0 |
0 |
1255 |
17854 |
3904 |
3041 |
|
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