Validation of sea ice concentration - Full domain
Bulletin date: 2025-07-31
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-07-25:
| 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 |
115045 |
12244 |
158 |
138 |
1 |
0 |
0 |
0 |
| OW |
555 |
4711 |
1039 |
1960 |
65 |
0 |
0 |
0 |
| VODI |
15 |
346 |
405 |
5361 |
1764 |
10 |
0 |
0 |
| ODI |
0 |
25 |
4 |
606 |
9101 |
1527 |
4 |
0 |
| CDI |
0 |
31 |
22 |
160 |
7782 |
25499 |
279 |
0 |
| VCDI |
0 |
0 |
0 |
188 |
763 |
4650 |
285 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-27:
| 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 |
115197 |
13387 |
169 |
121 |
5 |
0 |
0 |
0 |
| OW |
417 |
4752 |
1006 |
1873 |
101 |
2 |
0 |
0 |
| VODI |
0 |
493 |
431 |
5326 |
1792 |
21 |
0 |
0 |
| ODI |
0 |
28 |
3 |
653 |
8346 |
1813 |
11 |
0 |
| CDI |
0 |
80 |
33 |
164 |
7674 |
21992 |
1796 |
42 |
| VCDI |
0 |
3 |
11 |
175 |
639 |
5205 |
982 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-29:
| 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 |
117194 |
14443 |
244 |
167 |
5 |
0 |
0 |
0 |
| OW |
158 |
3582 |
1154 |
2246 |
41 |
8 |
0 |
0 |
| VODI |
3 |
173 |
156 |
5198 |
1589 |
19 |
1 |
0 |
| ODI |
0 |
31 |
21 |
253 |
12479 |
1720 |
1 |
0 |
| CDI |
0 |
6 |
20 |
207 |
3615 |
24613 |
1095 |
1 |
| VCDI |
0 |
0 |
0 |
30 |
192 |
1381 |
2694 |
3 |
|
...date precedes bulletin
|
Date: 2025-07-31:
| 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 |
116777 |
15037 |
219 |
129 |
1 |
0 |
0 |
0 |
| OW |
155 |
3966 |
1122 |
1868 |
16 |
0 |
0 |
0 |
| VODI |
1 |
310 |
241 |
5289 |
2088 |
1 |
0 |
0 |
| ODI |
0 |
35 |
15 |
383 |
11386 |
4277 |
0 |
0 |
| CDI |
0 |
17 |
21 |
220 |
4799 |
20436 |
1427 |
0 |
| VCDI |
0 |
0 |
0 |
7 |
215 |
3564 |
721 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
116775 |
15173 |
265 |
141 |
1 |
0 |
0 |
0 |
| OW |
156 |
3788 |
1063 |
2007 |
17 |
0 |
0 |
0 |
| VODI |
2 |
351 |
254 |
5133 |
2105 |
1 |
0 |
0 |
| ODI |
0 |
35 |
11 |
377 |
11061 |
4347 |
31 |
0 |
| CDI |
0 |
18 |
25 |
235 |
5120 |
20305 |
1388 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
201 |
3625 |
729 |
0 |
|
Date: 2025-08-02:
| 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 |
117628 |
14178 |
155 |
78 |
0 |
0 |
0 |
0 |
| OW |
378 |
4457 |
1079 |
1583 |
4 |
0 |
0 |
0 |
| VODI |
50 |
620 |
467 |
6154 |
1502 |
17 |
0 |
0 |
| ODI |
0 |
81 |
13 |
1114 |
8539 |
7291 |
219 |
0 |
| CDI |
0 |
59 |
34 |
210 |
4733 |
14361 |
4639 |
326 |
| VCDI |
0 |
0 |
0 |
2 |
240 |
1654 |
2874 |
4 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
117643 |
14383 |
203 |
89 |
0 |
0 |
0 |
0 |
| OW |
384 |
4232 |
1094 |
1720 |
2 |
0 |
0 |
0 |
| VODI |
29 |
636 |
402 |
5851 |
1786 |
13 |
0 |
0 |
| ODI |
0 |
75 |
15 |
1256 |
8124 |
6725 |
450 |
0 |
| CDI |
0 |
69 |
34 |
223 |
4879 |
14753 |
4332 |
321 |
| VCDI |
0 |
0 |
0 |
2 |
227 |
1832 |
2950 |
9 |
|
Date: 2025-08-04:
| 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 |
119338 |
14629 |
146 |
147 |
0 |
0 |
0 |
0 |
| OW |
250 |
4070 |
1418 |
2418 |
19 |
0 |
0 |
0 |
| VODI |
0 |
119 |
103 |
6806 |
880 |
0 |
0 |
0 |
| ODI |
0 |
18 |
1 |
431 |
10437 |
479 |
0 |
0 |
| CDI |
0 |
11 |
1 |
37 |
3612 |
20575 |
226 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
26 |
2131 |
4826 |
1589 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
119172 |
12820 |
149 |
105 |
0 |
0 |
0 |
0 |
| OW |
415 |
4908 |
920 |
1541 |
1 |
0 |
0 |
0 |
| VODI |
1 |
911 |
573 |
6623 |
1456 |
8 |
0 |
0 |
| ODI |
0 |
107 |
10 |
1331 |
7820 |
7490 |
78 |
0 |
| CDI |
0 |
96 |
16 |
217 |
5542 |
15007 |
2883 |
696 |
| VCDI |
0 |
5 |
1 |
22 |
155 |
680 |
2091 |
893 |
|
Date: 2025-08-06:
| 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 |
120835 |
13533 |
158 |
126 |
4 |
0 |
0 |
0 |
| OW |
224 |
4885 |
980 |
1842 |
43 |
0 |
0 |
0 |
| VODI |
0 |
323 |
279 |
5916 |
1559 |
28 |
0 |
0 |
| ODI |
0 |
23 |
2 |
492 |
8933 |
1798 |
42 |
0 |
| CDI |
0 |
2 |
0 |
29 |
4408 |
19202 |
2255 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
22 |
1464 |
4102 |
1234 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
120674 |
11566 |
152 |
143 |
2 |
0 |
0 |
0 |
| OW |
385 |
5514 |
682 |
1403 |
23 |
0 |
0 |
0 |
| VODI |
0 |
1487 |
508 |
5481 |
2197 |
167 |
6 |
0 |
| ODI |
0 |
121 |
51 |
1145 |
6800 |
8364 |
276 |
0 |
| CDI |
0 |
78 |
26 |
222 |
5827 |
13515 |
4531 |
813 |
| VCDI |
0 |
0 |
0 |
11 |
120 |
446 |
1586 |
421 |
|
Date: 2025-08-08:
| 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 |
121784 |
13157 |
90 |
163 |
2 |
0 |
0 |
0 |
| OW |
304 |
5083 |
809 |
1497 |
69 |
0 |
0 |
0 |
| VODI |
0 |
571 |
481 |
5518 |
1828 |
30 |
0 |
0 |
| ODI |
0 |
22 |
17 |
818 |
9086 |
1399 |
53 |
0 |
| CDI |
0 |
0 |
0 |
40 |
3971 |
19410 |
3066 |
0 |
| VCDI |
0 |
0 |
0 |
18 |
66 |
244 |
3559 |
1588 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
121491 |
11022 |
101 |
183 |
0 |
0 |
0 |
0 |
| OW |
535 |
5733 |
587 |
1340 |
59 |
2 |
0 |
0 |
| VODI |
62 |
1805 |
609 |
5005 |
2466 |
94 |
1 |
0 |
| ODI |
0 |
177 |
76 |
1228 |
6227 |
8217 |
604 |
0 |
| CDI |
0 |
96 |
24 |
256 |
6180 |
12665 |
4988 |
1084 |
| VCDI |
0 |
0 |
0 |
42 |
90 |
105 |
1085 |
504 |
|
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