Validation of sea ice concentration - Full domain
Bulletin date: 2025-05-01
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-04-25:
| 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 |
59528 |
13305 |
206 |
180 |
43 |
4 |
0 |
0 |
| OW |
799 |
1282 |
291 |
503 |
280 |
49 |
8 |
0 |
| VODI |
1941 |
327 |
242 |
659 |
673 |
369 |
76 |
0 |
| ODI |
1630 |
21 |
41 |
380 |
732 |
866 |
422 |
7 |
| CDI |
0 |
3 |
11 |
158 |
632 |
2948 |
3779 |
61 |
| VCDI |
0 |
0 |
0 |
77 |
632 |
2785 |
37291 |
47569 |
|
...date precedes bulletin
|
Date: 2025-04-27:
| 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 |
58887 |
13778 |
180 |
163 |
39 |
3 |
1 |
0 |
| OW |
710 |
1400 |
328 |
552 |
275 |
66 |
34 |
0 |
| VODI |
1849 |
368 |
241 |
736 |
705 |
436 |
187 |
0 |
| ODI |
1849 |
29 |
34 |
352 |
737 |
1043 |
437 |
0 |
| CDI |
0 |
10 |
22 |
186 |
688 |
2490 |
4013 |
14 |
| VCDI |
0 |
1 |
5 |
86 |
634 |
2993 |
38786 |
45463 |
|
...date precedes bulletin
|
Date: 2025-04-29:
| 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 |
59708 |
13409 |
134 |
93 |
15 |
2 |
0 |
0 |
| OW |
704 |
1329 |
364 |
474 |
173 |
27 |
7 |
0 |
| VODI |
1827 |
308 |
285 |
1036 |
652 |
170 |
21 |
10 |
| ODI |
1859 |
22 |
34 |
386 |
1099 |
725 |
91 |
14 |
| CDI |
0 |
7 |
22 |
162 |
811 |
3881 |
2025 |
86 |
| VCDI |
0 |
0 |
0 |
51 |
718 |
3973 |
38222 |
45874 |
|
...date precedes bulletin
|
Date: 2025-05-01:
| 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 |
59464 |
13399 |
155 |
99 |
12 |
0 |
0 |
0 |
| OW |
703 |
1334 |
398 |
545 |
204 |
25 |
4 |
14 |
| VODI |
1855 |
254 |
269 |
1086 |
669 |
176 |
49 |
34 |
| ODI |
1829 |
33 |
58 |
456 |
1155 |
663 |
205 |
44 |
| CDI |
0 |
12 |
21 |
237 |
979 |
4236 |
3106 |
97 |
| VCDI |
0 |
5 |
15 |
169 |
969 |
5025 |
37302 |
43446 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59459 |
13439 |
169 |
128 |
16 |
0 |
0 |
0 |
| OW |
708 |
1310 |
380 |
514 |
202 |
26 |
4 |
14 |
| VODI |
1855 |
241 |
273 |
1126 |
667 |
182 |
52 |
26 |
| ODI |
1829 |
31 |
59 |
443 |
1166 |
676 |
216 |
37 |
| CDI |
0 |
13 |
20 |
220 |
1008 |
4285 |
3315 |
105 |
| VCDI |
0 |
3 |
15 |
161 |
929 |
4956 |
37079 |
43453 |
|
Date: 2025-05-03:
| 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 |
59963 |
12809 |
116 |
53 |
9 |
0 |
0 |
0 |
| OW |
695 |
1466 |
437 |
517 |
181 |
25 |
2 |
0 |
| VODI |
1872 |
419 |
234 |
999 |
699 |
228 |
41 |
78 |
| ODI |
1806 |
108 |
112 |
518 |
1337 |
782 |
244 |
50 |
| CDI |
0 |
30 |
34 |
273 |
1523 |
4792 |
3238 |
104 |
| VCDI |
0 |
2 |
15 |
95 |
907 |
5777 |
36918 |
41302 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59953 |
12924 |
159 |
77 |
15 |
0 |
0 |
0 |
| OW |
705 |
1361 |
399 |
509 |
202 |
27 |
5 |
8 |
| VODI |
1875 |
423 |
243 |
995 |
717 |
245 |
48 |
64 |
| ODI |
1803 |
108 |
103 |
536 |
1315 |
811 |
260 |
43 |
| CDI |
0 |
16 |
30 |
257 |
1548 |
4920 |
3408 |
127 |
| VCDI |
0 |
2 |
14 |
81 |
859 |
5601 |
36722 |
41292 |
|
Date: 2025-05-05:
| 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 |
59783 |
13177 |
168 |
116 |
17 |
2 |
0 |
0 |
| OW |
813 |
1255 |
363 |
587 |
238 |
56 |
7 |
19 |
| VODI |
1899 |
439 |
223 |
905 |
682 |
273 |
67 |
55 |
| ODI |
1771 |
158 |
117 |
503 |
1431 |
994 |
237 |
43 |
| CDI |
0 |
33 |
62 |
310 |
1858 |
5737 |
4261 |
124 |
| VCDI |
0 |
17 |
10 |
141 |
931 |
5304 |
32844 |
42780 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59778 |
13112 |
157 |
108 |
13 |
2 |
1 |
0 |
| OW |
818 |
1285 |
383 |
612 |
229 |
55 |
6 |
8 |
| VODI |
1899 |
492 |
223 |
928 |
781 |
259 |
64 |
62 |
| ODI |
1771 |
142 |
125 |
484 |
1422 |
1167 |
276 |
54 |
| CDI |
0 |
30 |
47 |
302 |
1834 |
5375 |
3850 |
128 |
| VCDI |
0 |
18 |
8 |
128 |
878 |
5508 |
33219 |
42769 |
|
Date: 2025-05-07:
| 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 |
58758 |
14231 |
96 |
57 |
19 |
1 |
0 |
0 |
| OW |
770 |
1617 |
388 |
476 |
134 |
16 |
1 |
7 |
| VODI |
1911 |
464 |
368 |
1287 |
793 |
209 |
42 |
18 |
| ODI |
1752 |
50 |
80 |
718 |
1903 |
748 |
162 |
47 |
| CDI |
0 |
49 |
63 |
378 |
2486 |
6170 |
1922 |
182 |
| VCDI |
0 |
9 |
12 |
164 |
849 |
5535 |
36024 |
39844 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58756 |
13780 |
116 |
127 |
34 |
1 |
0 |
3 |
| OW |
772 |
1628 |
377 |
543 |
231 |
52 |
2 |
35 |
| VODI |
1926 |
659 |
241 |
1037 |
784 |
286 |
99 |
68 |
| ODI |
1737 |
235 |
142 |
670 |
1820 |
998 |
299 |
76 |
| CDI |
0 |
99 |
113 |
488 |
2138 |
5485 |
3553 |
129 |
| VCDI |
0 |
19 |
18 |
215 |
1177 |
5857 |
34198 |
39787 |
|
Date: 2025-05-09:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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