Validation of sea ice concentration - American sector
Bulletin date: 2025-03-27
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-03-21:
| 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 |
5416 |
2820 |
36 |
43 |
1 |
0 |
0 |
0 |
| OW |
0 |
137 |
103 |
269 |
54 |
0 |
0 |
0 |
| VODI |
0 |
1 |
3 |
168 |
242 |
28 |
0 |
0 |
| ODI |
0 |
0 |
0 |
32 |
210 |
151 |
1 |
1 |
| CDI |
0 |
0 |
0 |
7 |
120 |
496 |
172 |
24 |
| VCDI |
0 |
0 |
0 |
41 |
88 |
3948 |
15367 |
31252 |
|
...date precedes bulletin
|
Date: 2025-03-23:
| 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 |
5175 |
2857 |
36 |
60 |
2 |
0 |
0 |
0 |
| OW |
0 |
159 |
112 |
231 |
62 |
4 |
0 |
0 |
| VODI |
0 |
0 |
1 |
167 |
233 |
37 |
0 |
0 |
| ODI |
0 |
0 |
0 |
4 |
250 |
150 |
14 |
1 |
| CDI |
0 |
0 |
0 |
2 |
157 |
373 |
421 |
52 |
| VCDI |
0 |
0 |
0 |
17 |
99 |
3031 |
12741 |
34783 |
|
...date precedes bulletin
|
Date: 2025-03-25:
| 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 |
5040 |
2863 |
33 |
74 |
7 |
0 |
0 |
0 |
| OW |
0 |
223 |
98 |
99 |
43 |
0 |
0 |
0 |
| VODI |
0 |
2 |
12 |
323 |
154 |
24 |
0 |
0 |
| ODI |
0 |
0 |
0 |
43 |
340 |
107 |
0 |
0 |
| CDI |
0 |
0 |
0 |
146 |
132 |
519 |
157 |
15 |
| VCDI |
0 |
0 |
0 |
12982 |
1231 |
2008 |
6292 |
28264 |
|
...date precedes bulletin
|
Date: 2025-03-27:
| 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 |
5137 |
2893 |
32 |
47 |
0 |
0 |
0 |
0 |
| OW |
0 |
255 |
95 |
133 |
41 |
1 |
0 |
0 |
| VODI |
0 |
12 |
31 |
242 |
128 |
47 |
0 |
0 |
| ODI |
0 |
0 |
0 |
48 |
278 |
164 |
3 |
0 |
| CDI |
0 |
0 |
0 |
5 |
226 |
431 |
271 |
48 |
| VCDI |
0 |
0 |
0 |
6 |
81 |
2226 |
10115 |
38235 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5137 |
2875 |
37 |
64 |
5 |
0 |
0 |
0 |
| OW |
0 |
262 |
78 |
120 |
45 |
6 |
0 |
0 |
| VODI |
0 |
23 |
43 |
220 |
137 |
44 |
0 |
0 |
| ODI |
0 |
0 |
0 |
66 |
266 |
166 |
5 |
0 |
| CDI |
0 |
0 |
0 |
6 |
226 |
454 |
349 |
55 |
| VCDI |
0 |
0 |
0 |
5 |
75 |
2199 |
10035 |
38228 |
|
Date: 2025-03-29:
| 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 |
5132 |
2803 |
27 |
53 |
15 |
0 |
0 |
0 |
| OW |
0 |
376 |
71 |
94 |
52 |
17 |
0 |
0 |
| VODI |
0 |
45 |
41 |
241 |
131 |
41 |
4 |
0 |
| ODI |
0 |
0 |
1 |
111 |
329 |
176 |
12 |
0 |
| CDI |
0 |
0 |
0 |
20 |
322 |
661 |
264 |
62 |
| VCDI |
0 |
0 |
0 |
4 |
152 |
2314 |
10594 |
37066 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5132 |
2837 |
31 |
58 |
26 |
0 |
0 |
0 |
| OW |
0 |
316 |
51 |
99 |
38 |
18 |
0 |
0 |
| VODI |
0 |
71 |
58 |
225 |
132 |
42 |
3 |
0 |
| ODI |
0 |
0 |
0 |
119 |
340 |
156 |
10 |
1 |
| CDI |
0 |
0 |
0 |
19 |
302 |
724 |
322 |
67 |
| VCDI |
0 |
0 |
0 |
3 |
163 |
2269 |
10539 |
37060 |
|
Date: 2025-03-31:
| 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 |
5247 |
3049 |
15 |
12 |
0 |
0 |
0 |
0 |
| OW |
0 |
289 |
108 |
175 |
10 |
0 |
0 |
0 |
| VODI |
0 |
0 |
11 |
462 |
367 |
9 |
0 |
0 |
| ODI |
0 |
0 |
0 |
33 |
485 |
226 |
9 |
14 |
| CDI |
0 |
0 |
0 |
10 |
150 |
1402 |
340 |
71 |
| VCDI |
0 |
0 |
0 |
1 |
101 |
1461 |
12995 |
34179 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5247 |
2861 |
31 |
28 |
0 |
0 |
0 |
0 |
| OW |
0 |
339 |
33 |
138 |
68 |
0 |
0 |
0 |
| VODI |
0 |
128 |
49 |
265 |
259 |
41 |
0 |
0 |
| ODI |
0 |
10 |
19 |
205 |
301 |
176 |
9 |
5 |
| CDI |
0 |
0 |
2 |
51 |
311 |
1202 |
354 |
98 |
| VCDI |
0 |
0 |
0 |
6 |
174 |
1679 |
12981 |
34161 |
|
Date: 2025-04-02:
| 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 |
5555 |
2937 |
40 |
29 |
0 |
0 |
0 |
0 |
| OW |
0 |
267 |
110 |
219 |
52 |
0 |
0 |
0 |
| VODI |
0 |
15 |
45 |
394 |
344 |
39 |
4 |
0 |
| ODI |
0 |
0 |
1 |
22 |
507 |
286 |
22 |
0 |
| CDI |
0 |
0 |
0 |
2 |
183 |
1186 |
411 |
43 |
| VCDI |
0 |
0 |
0 |
0 |
114 |
1532 |
10393 |
36479 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5555 |
2649 |
55 |
87 |
37 |
3 |
0 |
0 |
| OW |
0 |
377 |
26 |
118 |
122 |
28 |
2 |
0 |
| VODI |
0 |
171 |
80 |
321 |
266 |
50 |
8 |
0 |
| ODI |
0 |
22 |
34 |
121 |
332 |
129 |
27 |
0 |
| CDI |
0 |
0 |
1 |
19 |
266 |
1037 |
304 |
26 |
| VCDI |
0 |
0 |
0 |
0 |
177 |
1796 |
10489 |
36496 |
|
Date: 2025-04-04:
| 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 |
5630 |
2723 |
42 |
16 |
0 |
0 |
0 |
0 |
| OW |
0 |
425 |
102 |
289 |
47 |
0 |
0 |
0 |
| VODI |
0 |
20 |
33 |
264 |
334 |
189 |
9 |
0 |
| ODI |
0 |
0 |
0 |
6 |
273 |
601 |
132 |
12 |
| CDI |
0 |
0 |
0 |
0 |
44 |
706 |
1222 |
46 |
| VCDI |
0 |
0 |
0 |
0 |
49 |
992 |
8804 |
38221 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5629 |
2467 |
42 |
56 |
31 |
13 |
0 |
0 |
| OW |
1 |
423 |
49 |
157 |
91 |
78 |
0 |
0 |
| VODI |
0 |
266 |
65 |
287 |
244 |
170 |
1 |
0 |
| ODI |
0 |
12 |
21 |
75 |
251 |
318 |
123 |
4 |
| CDI |
0 |
0 |
0 |
0 |
82 |
696 |
959 |
41 |
| VCDI |
0 |
0 |
0 |
0 |
48 |
1213 |
9084 |
38234 |
|
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