Validation of sea ice concentration - American sector
Bulletin date: 2025-06-19
Data source: OSI SAF N.H. AMSR 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 |
0 |
1527 |
55 |
24 |
3 |
0 |
0 |
0 |
| OW |
0 |
1196 |
252 |
321 |
49 |
3 |
0 |
0 |
| VODI |
0 |
597 |
281 |
902 |
521 |
71 |
4 |
0 |
| ODI |
0 |
106 |
75 |
353 |
962 |
512 |
111 |
0 |
| CDI |
0 |
133 |
41 |
190 |
1101 |
3738 |
990 |
15 |
| VCDI |
0 |
3 |
6 |
32 |
1375 |
8654 |
13337 |
8326 |
|
...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 |
52 |
1648 |
63 |
24 |
6 |
0 |
0 |
0 |
| OW |
25 |
1369 |
262 |
388 |
62 |
1 |
0 |
0 |
| VODI |
6 |
779 |
256 |
684 |
571 |
103 |
0 |
0 |
| ODI |
2 |
182 |
98 |
377 |
902 |
484 |
76 |
2 |
| CDI |
0 |
156 |
48 |
170 |
927 |
3759 |
1217 |
2 |
| VCDI |
0 |
0 |
5 |
23 |
3137 |
11596 |
13218 |
3186 |
|
...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 |
59 |
2443 |
79 |
51 |
1 |
0 |
0 |
0 |
| OW |
1 |
1894 |
354 |
323 |
24 |
0 |
0 |
0 |
| VODI |
0 |
406 |
215 |
761 |
408 |
22 |
1 |
0 |
| ODI |
0 |
58 |
49 |
281 |
895 |
385 |
34 |
0 |
| CDI |
0 |
15 |
13 |
96 |
1243 |
5049 |
1304 |
27 |
| VCDI |
0 |
0 |
0 |
0 |
1954 |
6696 |
14502 |
6223 |
|
...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 |
213 |
2674 |
35 |
19 |
0 |
0 |
0 |
0 |
| OW |
30 |
2032 |
246 |
244 |
24 |
0 |
0 |
0 |
| VODI |
2 |
595 |
223 |
661 |
334 |
40 |
7 |
0 |
| ODI |
0 |
68 |
67 |
355 |
1093 |
619 |
55 |
0 |
| CDI |
0 |
8 |
4 |
128 |
1395 |
3667 |
1667 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
1642 |
9490 |
15771 |
2455 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
215 |
2854 |
41 |
21 |
0 |
0 |
0 |
0 |
| OW |
29 |
1830 |
229 |
244 |
34 |
1 |
0 |
0 |
| VODI |
1 |
607 |
224 |
629 |
311 |
28 |
6 |
0 |
| ODI |
0 |
78 |
72 |
381 |
1050 |
463 |
57 |
0 |
| CDI |
0 |
8 |
9 |
132 |
1455 |
3969 |
1795 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
1638 |
9355 |
15642 |
2455 |
|
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 |
611 |
2774 |
22 |
21 |
1 |
1 |
0 |
0 |
| OW |
164 |
1773 |
219 |
208 |
20 |
0 |
1 |
0 |
| VODI |
6 |
729 |
209 |
545 |
275 |
45 |
22 |
0 |
| ODI |
0 |
187 |
113 |
450 |
1581 |
467 |
50 |
0 |
| CDI |
0 |
21 |
18 |
273 |
1538 |
3200 |
990 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
2769 |
10980 |
12589 |
2989 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
613 |
2829 |
36 |
32 |
0 |
1 |
0 |
0 |
| OW |
157 |
1705 |
189 |
220 |
32 |
1 |
1 |
0 |
| VODI |
11 |
722 |
216 |
489 |
255 |
32 |
20 |
0 |
| ODI |
0 |
184 |
115 |
439 |
1337 |
490 |
47 |
0 |
| CDI |
0 |
44 |
25 |
317 |
1790 |
3475 |
1122 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
2770 |
10694 |
12462 |
2989 |
|
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 |
1369 |
3528 |
28 |
5 |
1 |
0 |
0 |
0 |
| OW |
97 |
1385 |
186 |
204 |
13 |
0 |
0 |
0 |
| VODI |
4 |
273 |
198 |
869 |
447 |
41 |
4 |
0 |
| ODI |
0 |
17 |
23 |
378 |
1799 |
1253 |
27 |
0 |
| CDI |
0 |
15 |
6 |
88 |
726 |
7702 |
493 |
0 |
| VCDI |
0 |
0 |
0 |
42 |
1327 |
10104 |
7824 |
5390 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1146 |
2845 |
31 |
7 |
1 |
0 |
0 |
0 |
| OW |
296 |
1502 |
130 |
272 |
30 |
2 |
1 |
0 |
| VODI |
28 |
693 |
163 |
485 |
246 |
91 |
22 |
0 |
| ODI |
0 |
136 |
94 |
450 |
1132 |
885 |
55 |
0 |
| CDI |
0 |
42 |
23 |
330 |
1383 |
4918 |
552 |
13 |
| VCDI |
0 |
0 |
0 |
42 |
1521 |
13204 |
7718 |
5377 |
|
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 |
1466 |
3839 |
21 |
7 |
3 |
0 |
0 |
0 |
| OW |
94 |
1386 |
181 |
189 |
13 |
1 |
0 |
0 |
| VODI |
7 |
390 |
215 |
866 |
401 |
141 |
7 |
0 |
| ODI |
0 |
29 |
34 |
476 |
2274 |
643 |
22 |
0 |
| CDI |
0 |
18 |
11 |
166 |
1330 |
6277 |
421 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
4118 |
12067 |
7417 |
1335 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1336 |
3185 |
26 |
12 |
1 |
0 |
0 |
0 |
| OW |
216 |
1475 |
132 |
221 |
24 |
4 |
0 |
0 |
| VODI |
15 |
784 |
186 |
525 |
357 |
58 |
19 |
0 |
| ODI |
0 |
157 |
82 |
557 |
1584 |
578 |
62 |
0 |
| CDI |
0 |
61 |
36 |
381 |
1937 |
4114 |
647 |
2 |
| VCDI |
0 |
0 |
0 |
9 |
4236 |
14375 |
7139 |
1333 |
|
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 |
1336 |
4286 |
41 |
50 |
8 |
0 |
0 |
0 |
| OW |
41 |
1470 |
222 |
218 |
21 |
1 |
0 |
0 |
| VODI |
0 |
672 |
215 |
898 |
548 |
36 |
11 |
0 |
| ODI |
0 |
89 |
75 |
1293 |
1355 |
438 |
25 |
0 |
| CDI |
0 |
30 |
15 |
243 |
1552 |
6260 |
241 |
0 |
| VCDI |
0 |
0 |
1 |
43 |
1444 |
15033 |
5425 |
2230 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1235 |
3629 |
36 |
42 |
7 |
0 |
0 |
0 |
| OW |
139 |
1581 |
136 |
137 |
9 |
0 |
0 |
0 |
| VODI |
3 |
1047 |
210 |
598 |
275 |
38 |
8 |
0 |
| ODI |
0 |
190 |
121 |
1291 |
1286 |
311 |
53 |
0 |
| CDI |
0 |
100 |
66 |
632 |
1791 |
4392 |
850 |
0 |
| VCDI |
0 |
0 |
0 |
45 |
1560 |
17027 |
4791 |
2230 |
|
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