Validation of sea ice concentration - Full domain
Bulletin date: 2025-03-27
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-03-21:
| 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 |
58223 |
13777 |
238 |
210 |
62 |
6 |
1 |
0 |
| OW |
613 |
1209 |
231 |
502 |
230 |
65 |
8 |
0 |
| VODI |
1810 |
365 |
164 |
551 |
658 |
137 |
16 |
0 |
| ODI |
1792 |
101 |
65 |
258 |
732 |
522 |
35 |
2 |
| CDI |
0 |
53 |
38 |
153 |
1073 |
3105 |
1653 |
5 |
| VCDI |
0 |
30 |
29 |
103 |
630 |
7731 |
37207 |
46417 |
|
...date precedes bulletin
|
Date: 2025-03-23:
| 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 |
58927 |
13620 |
131 |
156 |
27 |
1 |
0 |
0 |
| OW |
616 |
1477 |
285 |
352 |
153 |
29 |
1 |
0 |
| VODI |
1808 |
456 |
177 |
533 |
435 |
123 |
14 |
0 |
| ODI |
1795 |
135 |
105 |
258 |
612 |
365 |
69 |
0 |
| CDI |
0 |
50 |
58 |
324 |
1069 |
1855 |
1631 |
8 |
| VCDI |
0 |
24 |
35 |
146 |
462 |
7086 |
32295 |
53107 |
|
...date precedes bulletin
|
Date: 2025-03-25:
| 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 |
59815 |
13589 |
107 |
106 |
48 |
3 |
0 |
0 |
| OW |
609 |
1473 |
251 |
337 |
115 |
38 |
6 |
0 |
| VODI |
1819 |
358 |
212 |
559 |
417 |
117 |
3 |
0 |
| ODI |
1781 |
76 |
42 |
256 |
737 |
498 |
34 |
0 |
| CDI |
0 |
50 |
28 |
124 |
724 |
2437 |
497 |
5 |
| VCDI |
0 |
28 |
33 |
144 |
429 |
5919 |
34366 |
52620 |
|
...date precedes bulletin
|
Date: 2025-03-27:
| 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 |
59680 |
13604 |
141 |
92 |
53 |
4 |
3 |
0 |
| OW |
713 |
1261 |
253 |
420 |
115 |
24 |
13 |
0 |
| VODI |
1837 |
408 |
237 |
514 |
409 |
120 |
9 |
0 |
| ODI |
1772 |
111 |
60 |
378 |
647 |
439 |
64 |
0 |
| CDI |
0 |
82 |
38 |
176 |
785 |
2274 |
885 |
11 |
| VCDI |
0 |
90 |
48 |
162 |
544 |
6227 |
31640 |
54467 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59677 |
13708 |
146 |
100 |
57 |
4 |
3 |
0 |
| OW |
711 |
1171 |
277 |
424 |
109 |
27 |
13 |
0 |
| VODI |
1845 |
399 |
212 |
539 |
445 |
121 |
12 |
0 |
| ODI |
1769 |
114 |
52 |
349 |
658 |
449 |
70 |
0 |
| CDI |
0 |
81 |
40 |
162 |
734 |
2304 |
893 |
24 |
| VCDI |
0 |
83 |
50 |
168 |
550 |
6183 |
31623 |
54454 |
|
Date: 2025-03-29:
| 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 |
59764 |
13331 |
140 |
113 |
56 |
7 |
0 |
0 |
| OW |
712 |
1321 |
270 |
384 |
186 |
41 |
23 |
0 |
| VODI |
1842 |
390 |
171 |
558 |
407 |
179 |
6 |
0 |
| ODI |
1766 |
135 |
50 |
277 |
613 |
532 |
81 |
0 |
| CDI |
0 |
102 |
58 |
186 |
606 |
2436 |
1178 |
14 |
| VCDI |
0 |
90 |
53 |
147 |
448 |
6229 |
31463 |
54445 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59764 |
13472 |
143 |
121 |
61 |
8 |
0 |
0 |
| OW |
710 |
1194 |
275 |
402 |
176 |
48 |
23 |
0 |
| VODI |
1847 |
376 |
164 |
551 |
438 |
170 |
8 |
0 |
| ODI |
1763 |
134 |
57 |
259 |
627 |
592 |
81 |
0 |
| CDI |
0 |
121 |
53 |
182 |
537 |
2393 |
1246 |
17 |
| VCDI |
0 |
72 |
50 |
150 |
477 |
6213 |
31393 |
54442 |
|
Date: 2025-03-31:
| 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 |
59124 |
14094 |
175 |
162 |
52 |
13 |
7 |
0 |
| OW |
667 |
1154 |
264 |
454 |
150 |
32 |
18 |
0 |
| VODI |
1849 |
270 |
143 |
504 |
597 |
181 |
4 |
0 |
| ODI |
1740 |
66 |
53 |
174 |
640 |
604 |
59 |
0 |
| CDI |
0 |
22 |
23 |
196 |
553 |
3141 |
1068 |
0 |
| VCDI |
0 |
0 |
0 |
35 |
353 |
5815 |
37338 |
49016 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59134 |
13826 |
135 |
126 |
63 |
15 |
2 |
0 |
| OW |
652 |
1153 |
288 |
458 |
159 |
34 |
17 |
0 |
| VODI |
1838 |
376 |
124 |
456 |
479 |
198 |
16 |
0 |
| ODI |
1756 |
155 |
62 |
180 |
547 |
657 |
109 |
0 |
| CDI |
0 |
90 |
45 |
223 |
585 |
2491 |
1542 |
0 |
| VCDI |
0 |
6 |
4 |
82 |
512 |
6391 |
36808 |
49016 |
|
Date: 2025-04-02:
| 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 |
59093 |
14050 |
140 |
154 |
83 |
19 |
4 |
0 |
| OW |
637 |
1139 |
273 |
382 |
156 |
67 |
34 |
0 |
| VODI |
1843 |
361 |
136 |
445 |
515 |
190 |
31 |
0 |
| ODI |
1745 |
97 |
56 |
145 |
538 |
432 |
92 |
2 |
| CDI |
0 |
26 |
41 |
158 |
485 |
2087 |
1222 |
15 |
| VCDI |
0 |
0 |
2 |
42 |
295 |
4825 |
35683 |
53070 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59098 |
13439 |
170 |
193 |
112 |
29 |
6 |
0 |
| OW |
631 |
1279 |
186 |
353 |
171 |
86 |
29 |
0 |
| VODI |
1834 |
559 |
150 |
335 |
457 |
259 |
51 |
0 |
| ODI |
1755 |
246 |
60 |
194 |
516 |
495 |
166 |
4 |
| CDI |
0 |
146 |
72 |
174 |
490 |
2047 |
1613 |
34 |
| VCDI |
0 |
4 |
10 |
77 |
326 |
4704 |
35201 |
53049 |
|
Date: 2025-04-04:
| 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 |
58948 |
13768 |
226 |
126 |
59 |
18 |
2 |
0 |
| OW |
632 |
1030 |
294 |
464 |
145 |
69 |
10 |
0 |
| VODI |
1843 |
322 |
127 |
488 |
576 |
168 |
23 |
0 |
| ODI |
1745 |
130 |
42 |
166 |
487 |
522 |
89 |
0 |
| CDI |
0 |
100 |
69 |
189 |
764 |
2314 |
1128 |
2 |
| VCDI |
0 |
24 |
22 |
85 |
438 |
5431 |
27986 |
59739 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58948 |
12813 |
326 |
377 |
145 |
49 |
2 |
0 |
| OW |
629 |
1264 |
130 |
324 |
291 |
117 |
13 |
0 |
| VODI |
1835 |
621 |
123 |
229 |
427 |
301 |
78 |
0 |
| ODI |
1756 |
287 |
65 |
196 |
404 |
588 |
147 |
5 |
| CDI |
0 |
296 |
101 |
282 |
696 |
2141 |
1622 |
15 |
| VCDI |
0 |
93 |
35 |
110 |
506 |
5326 |
27376 |
59721 |
|
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