Validation of sea ice concentration - American sector
Bulletin date: 2025-03-13
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-03-07:
| 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 |
5967 |
2494 |
24 |
46 |
4 |
0 |
0 |
0 |
| OW |
0 |
382 |
101 |
209 |
26 |
0 |
0 |
0 |
| VODI |
0 |
1 |
9 |
255 |
153 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
50 |
258 |
66 |
2 |
0 |
| CDI |
0 |
0 |
0 |
4 |
183 |
434 |
90 |
52 |
| VCDI |
0 |
0 |
0 |
10 |
210 |
3632 |
12004 |
34564 |
|
...date precedes bulletin
|
Date: 2025-03-09:
| 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 |
6235 |
2290 |
47 |
59 |
5 |
0 |
0 |
0 |
| OW |
0 |
394 |
96 |
176 |
42 |
0 |
0 |
0 |
| VODI |
0 |
40 |
43 |
223 |
137 |
8 |
0 |
0 |
| ODI |
0 |
0 |
1 |
96 |
186 |
67 |
4 |
0 |
| CDI |
0 |
0 |
0 |
21 |
234 |
249 |
55 |
39 |
| VCDI |
0 |
0 |
0 |
25 |
449 |
3308 |
9857 |
36845 |
|
...date precedes bulletin
|
Date: 2025-03-11:
| 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 |
6467 |
2393 |
41 |
58 |
3 |
0 |
0 |
0 |
| OW |
0 |
338 |
131 |
175 |
48 |
0 |
0 |
0 |
| VODI |
0 |
3 |
8 |
209 |
184 |
17 |
0 |
0 |
| ODI |
0 |
0 |
0 |
33 |
213 |
100 |
10 |
0 |
| CDI |
0 |
0 |
0 |
15 |
209 |
468 |
143 |
21 |
| VCDI |
0 |
0 |
0 |
36 |
314 |
2320 |
9550 |
37724 |
|
...date precedes bulletin
|
Date: 2025-03-13:
| 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 |
6187 |
2574 |
77 |
67 |
4 |
0 |
0 |
0 |
| OW |
0 |
213 |
91 |
322 |
80 |
1 |
0 |
0 |
| VODI |
0 |
4 |
2 |
126 |
211 |
39 |
0 |
0 |
| ODI |
0 |
0 |
0 |
6 |
83 |
198 |
4 |
0 |
| CDI |
0 |
0 |
0 |
11 |
54 |
515 |
115 |
32 |
| VCDI |
0 |
0 |
0 |
36 |
150 |
2914 |
10722 |
36393 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
6187 |
2496 |
67 |
77 |
10 |
0 |
0 |
0 |
| OW |
0 |
291 |
99 |
309 |
76 |
1 |
0 |
0 |
| VODI |
0 |
4 |
4 |
123 |
192 |
27 |
0 |
0 |
| ODI |
0 |
0 |
0 |
11 |
88 |
194 |
3 |
0 |
| CDI |
0 |
0 |
0 |
14 |
61 |
533 |
127 |
37 |
| VCDI |
0 |
0 |
0 |
34 |
155 |
2912 |
10711 |
36388 |
|
Date: 2025-03-15:
| 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 |
5773 |
2789 |
64 |
88 |
19 |
0 |
0 |
0 |
| OW |
0 |
131 |
75 |
327 |
135 |
2 |
0 |
0 |
| VODI |
0 |
0 |
0 |
44 |
255 |
82 |
0 |
0 |
| ODI |
0 |
0 |
0 |
6 |
107 |
172 |
5 |
0 |
| CDI |
0 |
0 |
0 |
7 |
48 |
471 |
164 |
10 |
| VCDI |
0 |
3 |
2 |
94 |
358 |
3429 |
14622 |
31949 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5773 |
2737 |
58 |
115 |
16 |
0 |
0 |
0 |
| OW |
0 |
183 |
81 |
291 |
131 |
7 |
0 |
0 |
| VODI |
0 |
0 |
0 |
52 |
241 |
64 |
0 |
0 |
| ODI |
0 |
0 |
0 |
6 |
120 |
166 |
0 |
0 |
| CDI |
0 |
0 |
0 |
8 |
56 |
494 |
187 |
20 |
| VCDI |
0 |
3 |
2 |
94 |
358 |
3425 |
14604 |
31939 |
|
Date: 2025-03-17:
| 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 |
5751 |
2879 |
87 |
73 |
1 |
0 |
0 |
0 |
| OW |
0 |
27 |
80 |
246 |
35 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
139 |
284 |
11 |
0 |
0 |
| ODI |
0 |
0 |
0 |
1 |
231 |
154 |
2 |
0 |
| CDI |
0 |
0 |
0 |
5 |
39 |
817 |
69 |
34 |
| VCDI |
0 |
0 |
0 |
10 |
69 |
4623 |
14552 |
31012 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5751 |
2780 |
80 |
142 |
6 |
0 |
0 |
0 |
| OW |
0 |
126 |
85 |
243 |
93 |
0 |
0 |
0 |
| VODI |
0 |
0 |
2 |
69 |
282 |
27 |
0 |
0 |
| ODI |
0 |
0 |
0 |
4 |
157 |
155 |
5 |
0 |
| CDI |
0 |
0 |
0 |
0 |
29 |
611 |
159 |
23 |
| VCDI |
0 |
0 |
0 |
16 |
92 |
4812 |
14459 |
31023 |
|
Date: 2025-03-19:
| 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 |
5600 |
2884 |
60 |
55 |
5 |
0 |
0 |
0 |
| OW |
0 |
49 |
104 |
273 |
57 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
135 |
270 |
46 |
0 |
0 |
| ODI |
0 |
0 |
0 |
12 |
199 |
193 |
0 |
0 |
| CDI |
0 |
0 |
0 |
6 |
97 |
589 |
108 |
10 |
| VCDI |
0 |
0 |
0 |
36 |
175 |
4256 |
14586 |
31426 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5600 |
2875 |
92 |
90 |
9 |
0 |
0 |
0 |
| OW |
0 |
58 |
71 |
277 |
76 |
0 |
0 |
0 |
| VODI |
0 |
0 |
1 |
100 |
277 |
42 |
0 |
0 |
| ODI |
0 |
0 |
0 |
4 |
170 |
165 |
0 |
0 |
| CDI |
0 |
0 |
0 |
6 |
89 |
525 |
216 |
8 |
| VCDI |
0 |
0 |
0 |
40 |
182 |
4352 |
14478 |
31428 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5416 |
2922 |
95 |
108 |
6 |
0 |
0 |
0 |
| OW |
0 |
36 |
47 |
286 |
83 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
102 |
287 |
65 |
0 |
0 |
| ODI |
0 |
0 |
0 |
11 |
172 |
170 |
1 |
1 |
| CDI |
0 |
0 |
0 |
6 |
78 |
559 |
290 |
62 |
| VCDI |
0 |
0 |
0 |
47 |
89 |
3829 |
15249 |
31214 |
|
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