Validation of sea ice concentration - Full domain
Bulletin date: 2025-04-03
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2025-03-30:
| 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 |
59962 |
13001 |
144 |
115 |
52 |
8 |
1 |
0 |
| OW |
698 |
1327 |
270 |
405 |
153 |
45 |
29 |
0 |
| VODI |
1836 |
353 |
142 |
550 |
466 |
185 |
9 |
0 |
| ODI |
1760 |
129 |
40 |
232 |
645 |
560 |
88 |
3 |
| CDI |
0 |
120 |
48 |
159 |
634 |
2419 |
1189 |
16 |
| VCDI |
0 |
33 |
24 |
137 |
435 |
6511 |
37621 |
48256 |
|
...date precedes bulletin
|
Date: 2025-04-01:
| 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 |
59292 |
13894 |
176 |
129 |
85 |
10 |
1 |
0 |
| OW |
668 |
1089 |
270 |
424 |
133 |
48 |
27 |
0 |
| VODI |
1847 |
284 |
144 |
457 |
563 |
165 |
15 |
0 |
| ODI |
1745 |
68 |
48 |
149 |
575 |
486 |
87 |
0 |
| CDI |
0 |
22 |
32 |
151 |
552 |
2499 |
1380 |
0 |
| VCDI |
0 |
2 |
3 |
32 |
324 |
5292 |
37962 |
49680 |
|
...date precedes bulletin
|
Date: 2025-04-03:
| 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 |
59058 |
13982 |
168 |
149 |
70 |
12 |
1 |
0 |
| OW |
615 |
1126 |
272 |
376 |
173 |
50 |
20 |
0 |
| VODI |
1844 |
349 |
167 |
491 |
525 |
145 |
36 |
0 |
| ODI |
1744 |
102 |
64 |
182 |
565 |
393 |
100 |
0 |
| CDI |
0 |
50 |
42 |
171 |
672 |
2251 |
894 |
3 |
| VCDI |
0 |
5 |
9 |
76 |
389 |
5209 |
30377 |
57883 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59058 |
14066 |
180 |
152 |
74 |
14 |
1 |
0 |
| OW |
615 |
1047 |
277 |
412 |
188 |
64 |
19 |
0 |
| VODI |
1847 |
344 |
146 |
451 |
530 |
136 |
33 |
0 |
| ODI |
1741 |
102 |
66 |
179 |
533 |
387 |
101 |
0 |
| CDI |
0 |
51 |
45 |
176 |
681 |
2310 |
994 |
3 |
| VCDI |
0 |
4 |
8 |
75 |
388 |
5149 |
30280 |
57883 |
|
Date: 2025-04-05:
| 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 |
58675 |
13713 |
206 |
159 |
55 |
13 |
0 |
0 |
| OW |
644 |
1005 |
299 |
491 |
150 |
46 |
10 |
0 |
| VODI |
1842 |
326 |
105 |
502 |
576 |
168 |
23 |
0 |
| ODI |
1747 |
133 |
42 |
152 |
564 |
445 |
115 |
0 |
| CDI |
0 |
107 |
74 |
210 |
905 |
2753 |
1550 |
19 |
| VCDI |
0 |
37 |
25 |
54 |
363 |
4213 |
31543 |
56751 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58675 |
13817 |
225 |
168 |
55 |
15 |
0 |
0 |
| OW |
644 |
882 |
281 |
526 |
162 |
51 |
8 |
0 |
| VODI |
1843 |
341 |
99 |
459 |
573 |
178 |
25 |
0 |
| ODI |
1746 |
130 |
46 |
149 |
563 |
440 |
117 |
0 |
| CDI |
0 |
105 |
70 |
207 |
888 |
2884 |
1763 |
36 |
| VCDI |
0 |
46 |
30 |
59 |
372 |
4070 |
31328 |
56734 |
|
Date: 2025-04-07:
| 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 |
58704 |
13691 |
218 |
202 |
80 |
10 |
1 |
0 |
| OW |
664 |
1119 |
298 |
458 |
204 |
48 |
18 |
0 |
| VODI |
1848 |
201 |
143 |
582 |
687 |
256 |
44 |
1 |
| ODI |
1740 |
39 |
50 |
234 |
643 |
581 |
113 |
7 |
| CDI |
0 |
4 |
7 |
137 |
791 |
3248 |
1163 |
49 |
| VCDI |
0 |
0 |
0 |
33 |
244 |
2993 |
31847 |
57410 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58703 |
13374 |
200 |
209 |
85 |
14 |
1 |
0 |
| OW |
664 |
1035 |
233 |
378 |
216 |
45 |
19 |
0 |
| VODI |
1842 |
408 |
151 |
431 |
524 |
240 |
57 |
0 |
| ODI |
1747 |
156 |
76 |
246 |
472 |
567 |
148 |
10 |
| CDI |
0 |
76 |
52 |
297 |
916 |
3039 |
1443 |
43 |
| VCDI |
0 |
5 |
4 |
85 |
436 |
3231 |
31518 |
57414 |
|
Date: 2025-04-09:
| 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 |
58496 |
13951 |
416 |
234 |
34 |
0 |
0 |
0 |
| OW |
646 |
1106 |
301 |
442 |
181 |
24 |
1 |
0 |
| VODI |
1850 |
234 |
201 |
657 |
613 |
173 |
33 |
0 |
| ODI |
1738 |
27 |
47 |
318 |
757 |
518 |
34 |
0 |
| CDI |
0 |
8 |
21 |
220 |
1013 |
2550 |
828 |
19 |
| VCDI |
0 |
5 |
6 |
83 |
524 |
4744 |
28497 |
59260 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58497 |
13284 |
433 |
226 |
26 |
0 |
0 |
0 |
| OW |
644 |
1241 |
206 |
380 |
220 |
42 |
1 |
0 |
| VODI |
1841 |
541 |
171 |
515 |
507 |
179 |
39 |
1 |
| ODI |
1748 |
183 |
95 |
340 |
566 |
433 |
47 |
17 |
| CDI |
0 |
66 |
57 |
303 |
1123 |
2481 |
908 |
156 |
| VCDI |
0 |
16 |
30 |
190 |
680 |
4874 |
28398 |
59105 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58538 |
12835 |
226 |
297 |
139 |
25 |
3 |
0 |
| OW |
647 |
1312 |
168 |
410 |
290 |
104 |
2 |
0 |
| VODI |
1837 |
771 |
144 |
422 |
473 |
252 |
109 |
3 |
| ODI |
1752 |
390 |
98 |
247 |
506 |
434 |
167 |
55 |
| CDI |
0 |
189 |
115 |
330 |
711 |
1909 |
1224 |
173 |
| VCDI |
0 |
153 |
91 |
474 |
1035 |
5876 |
33961 |
51913 |
|
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