Validation of sea ice concentration - European sector
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 |
59797 |
13130 |
163 |
98 |
49 |
8 |
4 |
0 |
| OW |
615 |
1152 |
282 |
416 |
163 |
22 |
16 |
0 |
| VODI |
1829 |
191 |
175 |
552 |
392 |
134 |
7 |
0 |
| ODI |
1767 |
32 |
40 |
287 |
623 |
425 |
69 |
0 |
| CDI |
0 |
15 |
28 |
110 |
544 |
2287 |
821 |
0 |
| VCDI |
0 |
2 |
5 |
38 |
217 |
3458 |
9212 |
3687 |
|
...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 |
59961 |
12769 |
144 |
115 |
52 |
8 |
1 |
0 |
| OW |
698 |
1075 |
269 |
405 |
153 |
45 |
29 |
0 |
| VODI |
1836 |
156 |
123 |
541 |
453 |
183 |
9 |
0 |
| ODI |
1760 |
26 |
25 |
194 |
617 |
524 |
75 |
0 |
| CDI |
0 |
6 |
8 |
68 |
487 |
2151 |
1065 |
0 |
| VCDI |
0 |
0 |
0 |
29 |
162 |
3140 |
9628 |
3872 |
|
...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 |
13598 |
173 |
129 |
85 |
10 |
1 |
0 |
| OW |
668 |
896 |
260 |
416 |
128 |
48 |
27 |
0 |
| VODI |
1847 |
151 |
127 |
424 |
520 |
164 |
15 |
0 |
| ODI |
1745 |
27 |
27 |
117 |
539 |
473 |
80 |
0 |
| CDI |
0 |
5 |
12 |
49 |
325 |
2182 |
1213 |
0 |
| VCDI |
0 |
0 |
2 |
14 |
199 |
2525 |
9514 |
4835 |
|
...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 |
13685 |
168 |
149 |
70 |
12 |
1 |
0 |
| OW |
615 |
957 |
261 |
370 |
168 |
50 |
20 |
0 |
| VODI |
1844 |
244 |
155 |
464 |
464 |
113 |
35 |
0 |
| ODI |
1744 |
42 |
48 |
154 |
515 |
358 |
81 |
0 |
| CDI |
0 |
12 |
25 |
113 |
517 |
2032 |
751 |
0 |
| VCDI |
0 |
1 |
4 |
37 |
216 |
3269 |
8651 |
5389 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59058 |
13757 |
180 |
152 |
74 |
14 |
1 |
0 |
| OW |
615 |
887 |
266 |
405 |
166 |
51 |
19 |
0 |
| VODI |
1847 |
238 |
135 |
422 |
484 |
115 |
32 |
0 |
| ODI |
1741 |
42 |
51 |
151 |
482 |
355 |
81 |
0 |
| CDI |
0 |
16 |
25 |
119 |
526 |
2067 |
849 |
0 |
| VCDI |
0 |
1 |
4 |
38 |
218 |
3232 |
8557 |
5389 |
|
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 |
13486 |
191 |
139 |
55 |
13 |
0 |
0 |
| OW |
644 |
827 |
287 |
480 |
150 |
46 |
10 |
0 |
| VODI |
1842 |
230 |
91 |
476 |
519 |
141 |
22 |
0 |
| ODI |
1747 |
69 |
30 |
140 |
514 |
388 |
67 |
0 |
| CDI |
0 |
49 |
49 |
160 |
766 |
2337 |
1207 |
0 |
| VCDI |
0 |
21 |
7 |
21 |
223 |
2640 |
8544 |
5559 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58675 |
13565 |
210 |
148 |
55 |
15 |
0 |
0 |
| OW |
644 |
729 |
269 |
514 |
159 |
48 |
8 |
0 |
| VODI |
1843 |
243 |
88 |
436 |
519 |
153 |
24 |
0 |
| ODI |
1746 |
70 |
32 |
136 |
512 |
376 |
73 |
0 |
| CDI |
0 |
52 |
48 |
158 |
743 |
2447 |
1369 |
0 |
| VCDI |
0 |
23 |
8 |
24 |
239 |
2526 |
8376 |
5559 |
|
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 |
13464 |
206 |
185 |
80 |
10 |
1 |
0 |
| OW |
664 |
947 |
287 |
448 |
204 |
48 |
18 |
0 |
| VODI |
1848 |
125 |
116 |
530 |
653 |
243 |
42 |
0 |
| ODI |
1740 |
25 |
36 |
180 |
591 |
540 |
80 |
0 |
| CDI |
0 |
0 |
1 |
69 |
595 |
2669 |
892 |
0 |
| VCDI |
0 |
0 |
0 |
8 |
76 |
1375 |
10195 |
4967 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58703 |
13197 |
189 |
196 |
85 |
14 |
1 |
0 |
| OW |
664 |
892 |
225 |
364 |
212 |
45 |
19 |
0 |
| VODI |
1842 |
320 |
137 |
405 |
509 |
228 |
55 |
0 |
| ODI |
1747 |
99 |
61 |
211 |
433 |
489 |
121 |
0 |
| CDI |
0 |
49 |
31 |
226 |
770 |
2559 |
1132 |
0 |
| VCDI |
0 |
4 |
3 |
18 |
190 |
1550 |
9900 |
4967 |
|
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 |
13752 |
403 |
214 |
29 |
0 |
0 |
0 |
| OW |
646 |
1005 |
273 |
422 |
176 |
24 |
1 |
0 |
| VODI |
1850 |
195 |
169 |
554 |
589 |
166 |
28 |
0 |
| ODI |
1738 |
20 |
35 |
256 |
700 |
496 |
22 |
0 |
| CDI |
0 |
6 |
8 |
113 |
802 |
2325 |
598 |
0 |
| VCDI |
0 |
0 |
0 |
14 |
228 |
2949 |
9158 |
4402 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58497 |
13174 |
416 |
217 |
26 |
0 |
0 |
0 |
| OW |
644 |
1120 |
195 |
347 |
210 |
42 |
0 |
0 |
| VODI |
1841 |
469 |
152 |
445 |
489 |
172 |
30 |
0 |
| ODI |
1748 |
144 |
67 |
289 |
539 |
422 |
36 |
0 |
| CDI |
0 |
62 |
40 |
186 |
899 |
2238 |
696 |
0 |
| VCDI |
0 |
9 |
18 |
89 |
361 |
3086 |
9045 |
4402 |
|
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 |
13755 |
208 |
190 |
34 |
8 |
2 |
0 |
| OW |
630 |
953 |
221 |
515 |
258 |
49 |
8 |
0 |
| VODI |
1851 |
240 |
156 |
483 |
560 |
181 |
39 |
0 |
| ODI |
1735 |
60 |
49 |
237 |
625 |
528 |
71 |
0 |
| CDI |
0 |
13 |
27 |
149 |
709 |
1961 |
828 |
0 |
| VCDI |
0 |
0 |
2 |
28 |
266 |
3077 |
11485 |
2113 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58538 |
12771 |
226 |
297 |
139 |
25 |
3 |
0 |
| OW |
647 |
1205 |
145 |
392 |
286 |
104 |
2 |
0 |
| VODI |
1837 |
663 |
124 |
382 |
459 |
252 |
79 |
0 |
| ODI |
1752 |
315 |
87 |
199 |
486 |
418 |
117 |
0 |
| CDI |
0 |
62 |
71 |
254 |
643 |
1824 |
863 |
0 |
| VCDI |
0 |
5 |
10 |
78 |
439 |
3181 |
11369 |
2113 |
|
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