Validation of sea ice concentration - Full domain
Bulletin date: 2025-05-15
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-05-09:
| 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 |
59447 |
13343 |
100 |
85 |
14 |
4 |
0 |
3 |
| OW |
817 |
1886 |
317 |
467 |
134 |
31 |
4 |
18 |
| VODI |
1954 |
647 |
467 |
1274 |
822 |
209 |
93 |
46 |
| ODI |
1715 |
157 |
158 |
812 |
1838 |
904 |
216 |
92 |
| CDI |
0 |
185 |
135 |
609 |
2579 |
5253 |
2772 |
97 |
| VCDI |
0 |
47 |
55 |
320 |
1837 |
6672 |
38330 |
33845 |
|
...date precedes bulletin
|
Date: 2025-05-11:
| 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 |
59863 |
12777 |
61 |
96 |
9 |
2 |
0 |
22 |
| OW |
849 |
2090 |
359 |
492 |
118 |
19 |
17 |
45 |
| VODI |
1977 |
913 |
470 |
1305 |
800 |
238 |
104 |
82 |
| ODI |
1671 |
277 |
185 |
1014 |
1939 |
951 |
301 |
77 |
| CDI |
0 |
268 |
156 |
722 |
3009 |
5133 |
3172 |
53 |
| VCDI |
0 |
88 |
81 |
300 |
876 |
7415 |
41172 |
29242 |
|
...date precedes bulletin
|
Date: 2025-05-13:
| 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 |
61248 |
12291 |
62 |
45 |
2 |
0 |
1 |
4 |
| OW |
816 |
2337 |
393 |
407 |
60 |
18 |
8 |
22 |
| VODI |
2037 |
752 |
607 |
1954 |
1011 |
131 |
47 |
59 |
| ODI |
1600 |
160 |
123 |
1115 |
3150 |
1077 |
130 |
78 |
| CDI |
0 |
274 |
62 |
709 |
2722 |
6381 |
2006 |
109 |
| VCDI |
0 |
457 |
36 |
192 |
527 |
9445 |
43525 |
22620 |
|
...date precedes bulletin
|
Date: 2025-05-15:
| 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 |
61915 |
11762 |
48 |
26 |
4 |
0 |
14 |
0 |
| OW |
815 |
2736 |
322 |
305 |
73 |
16 |
34 |
0 |
| VODI |
2078 |
1058 |
696 |
2024 |
1060 |
99 |
129 |
0 |
| ODI |
1550 |
252 |
145 |
1222 |
2607 |
1002 |
321 |
4 |
| CDI |
0 |
95 |
102 |
623 |
2856 |
6915 |
3313 |
89 |
| VCDI |
0 |
13 |
15 |
65 |
358 |
7433 |
49349 |
17267 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61905 |
11819 |
53 |
32 |
6 |
0 |
24 |
0 |
| OW |
825 |
2640 |
344 |
327 |
74 |
17 |
29 |
0 |
| VODI |
2078 |
1113 |
664 |
2043 |
1089 |
118 |
118 |
0 |
| ODI |
1550 |
241 |
153 |
1178 |
2578 |
980 |
336 |
4 |
| CDI |
0 |
89 |
98 |
613 |
2753 |
6912 |
3332 |
91 |
| VCDI |
0 |
14 |
16 |
72 |
458 |
7438 |
49321 |
17265 |
|
Date: 2025-05-17:
| 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 |
61247 |
12411 |
51 |
49 |
11 |
0 |
0 |
13 |
| OW |
822 |
2730 |
387 |
391 |
129 |
6 |
5 |
28 |
| VODI |
2118 |
1169 |
644 |
2183 |
982 |
98 |
65 |
76 |
| ODI |
1497 |
300 |
199 |
1256 |
2570 |
918 |
307 |
82 |
| CDI |
0 |
166 |
146 |
753 |
2856 |
6648 |
3991 |
139 |
| VCDI |
0 |
59 |
37 |
198 |
670 |
6708 |
46808 |
18887 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61247 |
12467 |
64 |
62 |
18 |
0 |
0 |
16 |
| OW |
822 |
2670 |
389 |
388 |
127 |
6 |
9 |
28 |
| VODI |
2118 |
1208 |
621 |
2215 |
1061 |
98 |
65 |
69 |
| ODI |
1497 |
293 |
217 |
1208 |
2434 |
945 |
303 |
88 |
| CDI |
0 |
137 |
135 |
749 |
2841 |
6595 |
4068 |
168 |
| VCDI |
0 |
60 |
38 |
208 |
737 |
6734 |
46731 |
18856 |
|
Date: 2025-05-19:
| 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 |
61020 |
13469 |
117 |
107 |
37 |
2 |
0 |
10 |
| OW |
832 |
2857 |
616 |
644 |
123 |
22 |
5 |
10 |
| VODI |
2180 |
799 |
749 |
2799 |
997 |
86 |
33 |
26 |
| ODI |
1423 |
98 |
143 |
1021 |
3514 |
1232 |
111 |
61 |
| CDI |
0 |
34 |
48 |
357 |
1873 |
8213 |
1961 |
102 |
| VCDI |
0 |
4 |
9 |
69 |
273 |
6407 |
48210 |
18107 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61019 |
12505 |
91 |
84 |
41 |
4 |
0 |
20 |
| OW |
829 |
2694 |
438 |
525 |
144 |
29 |
9 |
41 |
| VODI |
2161 |
1322 |
678 |
2302 |
1043 |
182 |
71 |
81 |
| ODI |
1446 |
444 |
222 |
1087 |
2281 |
914 |
406 |
88 |
| CDI |
0 |
277 |
231 |
816 |
2684 |
6866 |
4449 |
771 |
| VCDI |
0 |
19 |
22 |
183 |
624 |
7967 |
45385 |
17315 |
|
Date: 2025-05-21:
| 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 |
61337 |
13257 |
113 |
117 |
33 |
1 |
0 |
5 |
| OW |
837 |
2883 |
678 |
680 |
161 |
16 |
2 |
11 |
| VODI |
2221 |
929 |
677 |
2566 |
1063 |
150 |
48 |
42 |
| ODI |
1375 |
146 |
201 |
1010 |
3070 |
1197 |
197 |
76 |
| CDI |
0 |
70 |
80 |
508 |
2373 |
8291 |
3435 |
122 |
| VCDI |
0 |
14 |
18 |
89 |
355 |
7425 |
45559 |
17372 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61318 |
12214 |
126 |
116 |
39 |
1 |
1 |
16 |
| OW |
852 |
2676 |
488 |
645 |
160 |
34 |
5 |
48 |
| VODI |
2206 |
1465 |
596 |
2078 |
1067 |
241 |
124 |
82 |
| ODI |
1394 |
552 |
253 |
1045 |
2288 |
975 |
499 |
96 |
| CDI |
0 |
360 |
278 |
911 |
2835 |
7318 |
6005 |
967 |
| VCDI |
0 |
32 |
26 |
175 |
666 |
8511 |
42607 |
16419 |
|
Date: 2025-05-23:
| 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 |
61535 |
13104 |
123 |
85 |
9 |
0 |
1 |
0 |
| OW |
846 |
3207 |
730 |
804 |
140 |
14 |
1 |
10 |
| VODI |
2271 |
1040 |
664 |
2356 |
1140 |
203 |
59 |
48 |
| ODI |
1316 |
211 |
187 |
1160 |
3086 |
1142 |
253 |
59 |
| CDI |
0 |
78 |
96 |
561 |
2561 |
9020 |
3957 |
103 |
| VCDI |
0 |
13 |
18 |
88 |
358 |
7610 |
45187 |
15356 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61595 |
11665 |
120 |
118 |
9 |
3 |
3 |
10 |
| OW |
919 |
2967 |
513 |
737 |
179 |
33 |
27 |
48 |
| VODI |
2379 |
1828 |
580 |
1817 |
1019 |
314 |
204 |
64 |
| ODI |
1075 |
768 |
309 |
1129 |
2324 |
1013 |
651 |
86 |
| CDI |
0 |
379 |
269 |
1061 |
3146 |
8359 |
6595 |
1206 |
| VCDI |
0 |
46 |
27 |
192 |
617 |
8267 |
41978 |
14162 |
|
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