Validation of sea ice concentration - Full domain
Bulletin date: 2025-03-20
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-03-14:
| 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 |
58329 |
14021 |
218 |
339 |
124 |
25 |
0 |
0 |
| OW |
658 |
1501 |
227 |
334 |
210 |
71 |
2 |
0 |
| VODI |
1829 |
434 |
220 |
487 |
563 |
263 |
33 |
0 |
| ODI |
1767 |
118 |
70 |
285 |
601 |
469 |
73 |
0 |
| CDI |
0 |
105 |
21 |
140 |
732 |
2351 |
1375 |
12 |
| VCDI |
0 |
131 |
71 |
218 |
415 |
7518 |
34704 |
49746 |
|
...date precedes bulletin
|
Date: 2025-03-16:
| 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 |
58405 |
13827 |
151 |
202 |
71 |
13 |
0 |
0 |
| OW |
648 |
1712 |
255 |
311 |
184 |
55 |
12 |
0 |
| VODI |
1816 |
543 |
241 |
489 |
419 |
176 |
2 |
0 |
| ODI |
1784 |
101 |
79 |
337 |
537 |
317 |
38 |
0 |
| CDI |
0 |
65 |
27 |
201 |
855 |
2105 |
1018 |
13 |
| VCDI |
0 |
94 |
58 |
341 |
1089 |
9292 |
38314 |
44613 |
|
...date precedes bulletin
|
Date: 2025-03-18:
| 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 |
58795 |
13771 |
142 |
159 |
99 |
4 |
1 |
0 |
| OW |
638 |
1483 |
270 |
381 |
193 |
63 |
14 |
0 |
| VODI |
1824 |
289 |
221 |
588 |
575 |
118 |
9 |
0 |
| ODI |
1775 |
54 |
60 |
298 |
835 |
505 |
21 |
0 |
| CDI |
0 |
34 |
21 |
140 |
1052 |
3247 |
757 |
30 |
| VCDI |
0 |
28 |
18 |
64 |
701 |
9320 |
39514 |
42699 |
|
...date precedes bulletin
|
Date: 2025-03-20:
| 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 |
57873 |
14278 |
196 |
191 |
80 |
1 |
1 |
0 |
| OW |
611 |
1185 |
274 |
501 |
217 |
55 |
26 |
0 |
| VODI |
1817 |
309 |
189 |
509 |
616 |
169 |
12 |
0 |
| ODI |
1785 |
83 |
57 |
242 |
748 |
630 |
31 |
3 |
| CDI |
0 |
29 |
23 |
131 |
989 |
3373 |
1349 |
8 |
| VCDI |
0 |
29 |
32 |
103 |
668 |
8465 |
38795 |
44127 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
57873 |
14305 |
211 |
198 |
77 |
1 |
1 |
0 |
| OW |
613 |
1166 |
261 |
503 |
215 |
54 |
26 |
0 |
| VODI |
1816 |
305 |
189 |
504 |
629 |
177 |
12 |
0 |
| ODI |
1784 |
83 |
53 |
242 |
746 |
632 |
38 |
3 |
| CDI |
0 |
33 |
33 |
133 |
1016 |
3465 |
1340 |
14 |
| VCDI |
0 |
21 |
24 |
97 |
635 |
8364 |
38797 |
44121 |
|
Date: 2025-03-22:
| 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 |
58759 |
13417 |
181 |
173 |
16 |
8 |
0 |
0 |
| OW |
630 |
1378 |
237 |
448 |
171 |
46 |
7 |
0 |
| VODI |
1808 |
461 |
188 |
510 |
548 |
149 |
14 |
0 |
| ODI |
1795 |
164 |
75 |
313 |
522 |
533 |
73 |
2 |
| CDI |
0 |
181 |
70 |
301 |
832 |
2488 |
1978 |
8 |
| VCDI |
0 |
50 |
48 |
173 |
461 |
7218 |
35248 |
49128 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58759 |
13449 |
201 |
178 |
25 |
10 |
0 |
0 |
| OW |
631 |
1359 |
231 |
453 |
169 |
47 |
5 |
0 |
| VODI |
1810 |
458 |
175 |
508 |
574 |
149 |
17 |
0 |
| ODI |
1792 |
165 |
81 |
314 |
510 |
561 |
92 |
2 |
| CDI |
0 |
165 |
63 |
296 |
830 |
2552 |
1959 |
12 |
| VCDI |
0 |
55 |
48 |
169 |
442 |
7123 |
35247 |
49124 |
|
Date: 2025-03-24:
| 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 |
59588 |
13736 |
96 |
112 |
51 |
0 |
0 |
0 |
| OW |
614 |
1608 |
263 |
294 |
139 |
34 |
4 |
0 |
| VODI |
1824 |
361 |
262 |
570 |
458 |
97 |
6 |
0 |
| ODI |
1775 |
40 |
47 |
237 |
842 |
457 |
27 |
0 |
| CDI |
0 |
11 |
31 |
122 |
738 |
2657 |
541 |
12 |
| VCDI |
0 |
15 |
14 |
87 |
322 |
6335 |
33625 |
52758 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59588 |
13320 |
87 |
117 |
51 |
1 |
0 |
0 |
| OW |
611 |
1594 |
211 |
230 |
149 |
25 |
1 |
0 |
| VODI |
1810 |
556 |
220 |
457 |
372 |
130 |
13 |
0 |
| ODI |
1792 |
170 |
97 |
261 |
559 |
330 |
28 |
0 |
| CDI |
0 |
83 |
42 |
206 |
963 |
2315 |
960 |
11 |
| VCDI |
0 |
48 |
56 |
151 |
456 |
6779 |
33201 |
52759 |
|
Date: 2025-03-26:
| 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 |
58892 |
14391 |
158 |
117 |
59 |
6 |
0 |
0 |
| OW |
616 |
1331 |
267 |
380 |
134 |
29 |
9 |
0 |
| VODI |
1821 |
406 |
221 |
527 |
412 |
124 |
10 |
0 |
| ODI |
1779 |
72 |
55 |
355 |
689 |
447 |
53 |
0 |
| CDI |
0 |
71 |
24 |
152 |
792 |
2356 |
563 |
12 |
| VCDI |
0 |
63 |
42 |
142 |
488 |
6254 |
31664 |
54827 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58892 |
13928 |
157 |
148 |
59 |
7 |
0 |
0 |
| OW |
616 |
1347 |
173 |
350 |
162 |
33 |
7 |
0 |
| VODI |
1816 |
635 |
237 |
349 |
339 |
172 |
13 |
0 |
| ODI |
1784 |
158 |
94 |
343 |
559 |
335 |
51 |
0 |
| CDI |
0 |
134 |
46 |
296 |
917 |
2663 |
763 |
27 |
| VCDI |
0 |
132 |
60 |
187 |
538 |
6006 |
31465 |
54812 |
|
Date: 2025-03-28:
| 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 |
59800 |
13389 |
163 |
98 |
49 |
8 |
4 |
0 |
| OW |
619 |
1369 |
286 |
417 |
163 |
22 |
16 |
0 |
| VODI |
1829 |
391 |
188 |
574 |
399 |
137 |
7 |
0 |
| ODI |
1767 |
124 |
60 |
307 |
647 |
455 |
90 |
0 |
| CDI |
0 |
99 |
57 |
184 |
621 |
2453 |
952 |
10 |
| VCDI |
0 |
105 |
37 |
169 |
447 |
6067 |
31535 |
54696 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59804 |
12911 |
168 |
154 |
54 |
7 |
4 |
0 |
| OW |
612 |
1300 |
207 |
381 |
189 |
41 |
9 |
0 |
| VODI |
1824 |
641 |
174 |
331 |
357 |
190 |
27 |
0 |
| ODI |
1775 |
236 |
103 |
299 |
441 |
374 |
86 |
1 |
| CDI |
0 |
248 |
107 |
416 |
869 |
2556 |
1347 |
34 |
| VCDI |
0 |
141 |
32 |
168 |
416 |
5974 |
31131 |
54671 |
|
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