Validation of sea ice concentration - Full domain
Bulletin date: 2025-04-17
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-04-11:
| 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 |
58558 |
13962 |
215 |
198 |
38 |
8 |
2 |
0 |
| OW |
630 |
1102 |
240 |
539 |
269 |
49 |
8 |
0 |
| VODI |
1851 |
341 |
180 |
552 |
590 |
184 |
44 |
0 |
| ODI |
1735 |
127 |
70 |
300 |
665 |
549 |
91 |
1 |
| CDI |
0 |
87 |
85 |
323 |
910 |
2204 |
1161 |
16 |
| VCDI |
0 |
31 |
52 |
268 |
682 |
5606 |
34160 |
52127 |
|
...date precedes bulletin
|
Date: 2025-04-13:
| 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 |
58072 |
14309 |
175 |
190 |
64 |
10 |
0 |
0 |
| OW |
629 |
1087 |
299 |
547 |
231 |
42 |
12 |
0 |
| VODI |
1852 |
289 |
160 |
552 |
573 |
252 |
28 |
0 |
| ODI |
1734 |
117 |
64 |
252 |
684 |
681 |
224 |
0 |
| CDI |
0 |
84 |
67 |
306 |
877 |
2306 |
1905 |
20 |
| VCDI |
0 |
43 |
41 |
201 |
627 |
4289 |
39098 |
47817 |
|
...date precedes bulletin
|
Date: 2025-04-15:
| 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 |
57986 |
14944 |
202 |
231 |
52 |
4 |
0 |
0 |
| OW |
655 |
916 |
324 |
481 |
207 |
48 |
1 |
0 |
| VODI |
1865 |
223 |
184 |
670 |
606 |
205 |
31 |
0 |
| ODI |
1720 |
51 |
53 |
310 |
895 |
725 |
139 |
0 |
| CDI |
0 |
30 |
37 |
369 |
1016 |
2819 |
2082 |
7 |
| VCDI |
0 |
7 |
14 |
92 |
455 |
3767 |
37658 |
48729 |
|
...date precedes bulletin
|
Date: 2025-04-17:
| 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 |
58568 |
14423 |
206 |
227 |
54 |
13 |
0 |
0 |
| OW |
651 |
1001 |
272 |
430 |
224 |
89 |
0 |
0 |
| VODI |
1874 |
333 |
176 |
536 |
522 |
341 |
55 |
0 |
| ODI |
1710 |
73 |
84 |
382 |
733 |
744 |
227 |
5 |
| CDI |
0 |
16 |
7 |
198 |
894 |
2653 |
2256 |
52 |
| VCDI |
0 |
11 |
2 |
82 |
530 |
3776 |
37407 |
48973 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58569 |
14400 |
212 |
224 |
64 |
12 |
0 |
0 |
| OW |
650 |
1011 |
268 |
426 |
214 |
83 |
1 |
0 |
| VODI |
1881 |
347 |
179 |
549 |
544 |
345 |
52 |
0 |
| ODI |
1703 |
73 |
80 |
390 |
741 |
799 |
239 |
5 |
| CDI |
0 |
20 |
6 |
199 |
864 |
2607 |
2684 |
56 |
| VCDI |
0 |
6 |
2 |
67 |
530 |
3770 |
36969 |
48969 |
|
Date: 2025-04-19:
| 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 |
58195 |
14441 |
230 |
258 |
58 |
16 |
0 |
0 |
| OW |
674 |
1100 |
226 |
426 |
262 |
102 |
2 |
0 |
| VODI |
1886 |
422 |
237 |
614 |
545 |
377 |
101 |
3 |
| ODI |
1696 |
43 |
80 |
431 |
594 |
817 |
313 |
8 |
| CDI |
0 |
16 |
13 |
201 |
958 |
2199 |
2713 |
89 |
| VCDI |
0 |
9 |
9 |
90 |
547 |
3544 |
38086 |
48179 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58192 |
14432 |
228 |
275 |
63 |
14 |
0 |
0 |
| OW |
678 |
1096 |
236 |
422 |
263 |
113 |
2 |
0 |
| VODI |
1890 |
437 |
223 |
613 |
548 |
378 |
110 |
1 |
| ODI |
1691 |
41 |
87 |
420 |
665 |
851 |
345 |
10 |
| CDI |
0 |
17 |
10 |
195 |
875 |
2259 |
2975 |
108 |
| VCDI |
0 |
8 |
11 |
95 |
550 |
3440 |
37783 |
48160 |
|
Date: 2025-04-21:
| 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 |
58091 |
14778 |
270 |
292 |
79 |
29 |
0 |
0 |
| OW |
684 |
1190 |
284 |
503 |
246 |
60 |
0 |
0 |
| VODI |
1904 |
187 |
222 |
780 |
762 |
333 |
32 |
1 |
| ODI |
1669 |
4 |
26 |
267 |
792 |
857 |
196 |
2 |
| CDI |
0 |
0 |
6 |
80 |
632 |
2577 |
2027 |
59 |
| VCDI |
0 |
0 |
1 |
38 |
258 |
3249 |
39811 |
47532 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58091 |
14462 |
254 |
289 |
91 |
17 |
0 |
0 |
| OW |
683 |
1158 |
239 |
438 |
314 |
111 |
3 |
0 |
| VODI |
1899 |
504 |
232 |
615 |
571 |
423 |
102 |
0 |
| ODI |
1675 |
29 |
71 |
416 |
661 |
725 |
386 |
4 |
| CDI |
0 |
6 |
13 |
163 |
700 |
2125 |
2976 |
95 |
| VCDI |
0 |
0 |
0 |
39 |
432 |
3704 |
38599 |
47495 |
|
Date: 2025-04-23:
| 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 |
58908 |
13954 |
285 |
248 |
111 |
36 |
0 |
0 |
| OW |
778 |
1090 |
289 |
460 |
225 |
79 |
6 |
0 |
| VODI |
1932 |
147 |
220 |
671 |
667 |
359 |
45 |
3 |
| ODI |
1657 |
7 |
18 |
303 |
700 |
837 |
272 |
23 |
| CDI |
0 |
3 |
4 |
124 |
458 |
2396 |
4020 |
85 |
| VCDI |
0 |
0 |
0 |
67 |
499 |
2496 |
38288 |
48040 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58903 |
13590 |
264 |
258 |
104 |
19 |
0 |
0 |
| OW |
779 |
1151 |
226 |
375 |
292 |
125 |
13 |
0 |
| VODI |
1927 |
417 |
264 |
582 |
542 |
439 |
173 |
7 |
| ODI |
1663 |
35 |
56 |
423 |
639 |
738 |
520 |
28 |
| CDI |
3 |
8 |
6 |
156 |
516 |
2201 |
4847 |
108 |
| VCDI |
0 |
0 |
0 |
79 |
567 |
2681 |
37078 |
48008 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59522 |
12890 |
214 |
296 |
95 |
21 |
0 |
0 |
| OW |
799 |
1264 |
203 |
334 |
308 |
171 |
38 |
0 |
| VODI |
1937 |
513 |
234 |
560 |
573 |
463 |
279 |
11 |
| ODI |
1638 |
209 |
85 |
333 |
522 |
707 |
611 |
23 |
| CDI |
2 |
62 |
53 |
317 |
818 |
2688 |
4370 |
76 |
| VCDI |
0 |
0 |
2 |
117 |
676 |
2971 |
36278 |
47527 |
|
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