Validation of sea ice concentration - American sector
Bulletin date: 2025-06-26
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-06-20:
| 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 |
14411 |
2515 |
42 |
77 |
5 |
0 |
0 |
0 |
| OW |
225 |
1993 |
188 |
274 |
83 |
2 |
0 |
0 |
| VODI |
29 |
418 |
233 |
1065 |
367 |
48 |
9 |
0 |
| ODI |
2 |
12 |
28 |
575 |
1748 |
319 |
45 |
0 |
| CDI |
0 |
0 |
0 |
109 |
2227 |
3260 |
1078 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1659 |
11023 |
12369 |
4793 |
|
...date precedes bulletin
|
Date: 2025-06-22:
| 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 |
14272 |
3234 |
21 |
65 |
7 |
0 |
0 |
0 |
| OW |
337 |
1698 |
175 |
400 |
67 |
5 |
0 |
0 |
| VODI |
39 |
551 |
179 |
905 |
336 |
66 |
11 |
0 |
| ODI |
4 |
21 |
35 |
618 |
1889 |
461 |
12 |
0 |
| CDI |
0 |
0 |
0 |
206 |
1814 |
4182 |
353 |
204 |
| VCDI |
0 |
0 |
0 |
0 |
2143 |
11703 |
5354 |
9864 |
|
...date precedes bulletin
|
Date: 2025-06-24:
| 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 |
15238 |
3740 |
38 |
86 |
2 |
0 |
0 |
0 |
| OW |
116 |
1363 |
233 |
418 |
42 |
6 |
1 |
0 |
| VODI |
10 |
162 |
90 |
1311 |
553 |
50 |
6 |
0 |
| ODI |
3 |
1 |
1 |
392 |
2892 |
357 |
9 |
0 |
| CDI |
0 |
0 |
0 |
87 |
1609 |
6920 |
214 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3583 |
10357 |
8384 |
2957 |
|
...date precedes bulletin
|
Date: 2025-06-26:
| 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 |
15829 |
3562 |
21 |
79 |
4 |
0 |
0 |
0 |
| OW |
99 |
1488 |
214 |
362 |
52 |
8 |
0 |
0 |
| VODI |
5 |
525 |
138 |
1124 |
609 |
80 |
2 |
0 |
| ODI |
3 |
24 |
7 |
1212 |
1848 |
493 |
9 |
0 |
| CDI |
0 |
40 |
2 |
237 |
1282 |
6936 |
110 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1880 |
14791 |
5071 |
3085 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15823 |
3617 |
22 |
93 |
8 |
0 |
0 |
0 |
| OW |
106 |
1431 |
194 |
334 |
50 |
11 |
0 |
0 |
| VODI |
4 |
521 |
144 |
1154 |
558 |
75 |
2 |
0 |
| ODI |
3 |
30 |
20 |
1093 |
1794 |
658 |
9 |
0 |
| CDI |
0 |
40 |
2 |
340 |
1370 |
6461 |
140 |
2 |
| VCDI |
0 |
0 |
0 |
0 |
1895 |
15103 |
5041 |
3083 |
|
Date: 2025-06-28:
| 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 |
16149 |
3669 |
15 |
111 |
4 |
0 |
0 |
0 |
| OW |
184 |
1666 |
160 |
338 |
97 |
17 |
0 |
0 |
| VODI |
36 |
504 |
119 |
1509 |
668 |
77 |
0 |
0 |
| ODI |
9 |
38 |
24 |
1615 |
1051 |
457 |
1 |
0 |
| CDI |
1 |
36 |
5 |
253 |
1471 |
6303 |
22 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1191 |
16257 |
4391 |
2783 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
16132 |
3726 |
24 |
135 |
10 |
0 |
0 |
0 |
| OW |
193 |
1583 |
146 |
282 |
81 |
15 |
0 |
0 |
| VODI |
43 |
517 |
119 |
1470 |
618 |
86 |
0 |
0 |
| ODI |
9 |
51 |
29 |
1513 |
1281 |
632 |
0 |
0 |
| CDI |
2 |
36 |
5 |
426 |
1283 |
5827 |
19 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1209 |
16551 |
4395 |
2783 |
|
Date: 2025-06-30:
| 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 |
16528 |
4501 |
43 |
101 |
15 |
0 |
0 |
0 |
| OW |
71 |
1615 |
261 |
1426 |
96 |
2 |
0 |
0 |
| VODI |
15 |
86 |
30 |
2176 |
882 |
18 |
0 |
0 |
| ODI |
0 |
16 |
3 |
109 |
1936 |
502 |
0 |
0 |
| CDI |
0 |
2 |
0 |
8 |
1689 |
9085 |
14 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1128 |
12945 |
4241 |
1687 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
16442 |
3864 |
56 |
112 |
7 |
0 |
0 |
0 |
| OW |
142 |
1647 |
81 |
335 |
109 |
11 |
0 |
0 |
| VODI |
23 |
556 |
148 |
1685 |
703 |
79 |
3 |
0 |
| ODI |
7 |
107 |
47 |
1399 |
1455 |
468 |
22 |
0 |
| CDI |
0 |
46 |
5 |
288 |
1819 |
5772 |
38 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
1653 |
16222 |
4192 |
1687 |
|
Date: 2025-07-02:
| 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 |
17007 |
4269 |
54 |
87 |
2 |
0 |
0 |
0 |
| OW |
163 |
2306 |
455 |
1043 |
54 |
2 |
0 |
0 |
| VODI |
20 |
204 |
58 |
1694 |
693 |
26 |
0 |
0 |
| ODI |
0 |
23 |
2 |
171 |
2409 |
149 |
0 |
0 |
| CDI |
0 |
2 |
0 |
7 |
2911 |
7867 |
80 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
689 |
12867 |
3229 |
2688 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
16963 |
3675 |
57 |
41 |
1 |
0 |
0 |
0 |
| OW |
197 |
1638 |
163 |
307 |
104 |
3 |
0 |
0 |
| VODI |
29 |
972 |
248 |
1506 |
540 |
30 |
0 |
0 |
| ODI |
1 |
459 |
98 |
999 |
1700 |
283 |
0 |
0 |
| CDI |
0 |
60 |
3 |
149 |
3333 |
4783 |
23 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1080 |
15812 |
3286 |
2688 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
18261 |
1483 |
1208 |
20 |
5 |
0 |
0 |
0 |
| OW |
600 |
1148 |
544 |
322 |
14 |
1 |
0 |
0 |
| VODI |
141 |
777 |
844 |
1412 |
178 |
22 |
0 |
0 |
| ODI |
99 |
449 |
713 |
1369 |
651 |
177 |
0 |
0 |
| CDI |
16 |
16 |
839 |
1208 |
1943 |
3804 |
206 |
25 |
| VCDI |
0 |
0 |
172 |
2026 |
4088 |
10740 |
3885 |
1825 |
|
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