Validation of sea ice concentration - American sector
Bulletin date: 2025-03-20
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-03-14:
| 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 |
5949 |
2702 |
81 |
99 |
10 |
0 |
0 |
0 |
| OW |
0 |
166 |
82 |
335 |
100 |
2 |
0 |
0 |
| VODI |
0 |
0 |
0 |
67 |
257 |
56 |
0 |
0 |
| ODI |
0 |
0 |
0 |
7 |
101 |
164 |
1 |
0 |
| CDI |
0 |
0 |
0 |
12 |
65 |
537 |
111 |
21 |
| VCDI |
0 |
0 |
0 |
61 |
144 |
3232 |
11372 |
35497 |
|
...date precedes bulletin
|
Date: 2025-03-16:
| 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 |
5682 |
2844 |
68 |
72 |
13 |
0 |
0 |
0 |
| OW |
0 |
97 |
59 |
351 |
130 |
5 |
0 |
0 |
| VODI |
0 |
0 |
0 |
45 |
262 |
90 |
0 |
0 |
| ODI |
0 |
0 |
0 |
2 |
109 |
176 |
5 |
0 |
| CDI |
0 |
0 |
0 |
9 |
32 |
432 |
241 |
15 |
| VCDI |
0 |
0 |
0 |
57 |
310 |
4344 |
14934 |
30847 |
|
...date precedes bulletin
|
Date: 2025-03-18:
| 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 |
5643 |
2898 |
69 |
64 |
9 |
0 |
0 |
0 |
| OW |
0 |
40 |
88 |
274 |
47 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
125 |
287 |
35 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
210 |
165 |
0 |
0 |
| CDI |
0 |
0 |
0 |
2 |
64 |
659 |
59 |
23 |
| VCDI |
0 |
0 |
0 |
19 |
128 |
4602 |
14843 |
30878 |
|
...date precedes bulletin
|
Date: 2025-03-20:
| 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 |
5486 |
2892 |
50 |
43 |
0 |
0 |
0 |
0 |
| OW |
0 |
73 |
101 |
300 |
57 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
140 |
269 |
38 |
0 |
0 |
| ODI |
0 |
0 |
0 |
22 |
208 |
180 |
1 |
0 |
| CDI |
0 |
0 |
0 |
9 |
82 |
683 |
94 |
15 |
| VCDI |
0 |
0 |
0 |
51 |
87 |
4231 |
15854 |
30265 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5486 |
2883 |
64 |
68 |
0 |
0 |
0 |
0 |
| OW |
0 |
82 |
87 |
293 |
62 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
130 |
255 |
45 |
0 |
0 |
| ODI |
0 |
0 |
0 |
15 |
211 |
166 |
2 |
0 |
| CDI |
0 |
0 |
0 |
13 |
89 |
687 |
101 |
18 |
| VCDI |
0 |
0 |
0 |
46 |
86 |
4234 |
15846 |
30262 |
|
Date: 2025-03-22:
| 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 |
5270 |
2855 |
42 |
51 |
1 |
0 |
0 |
0 |
| OW |
0 |
143 |
103 |
257 |
58 |
3 |
0 |
0 |
| VODI |
0 |
0 |
3 |
150 |
253 |
35 |
0 |
0 |
| ODI |
0 |
0 |
0 |
13 |
235 |
154 |
10 |
1 |
| CDI |
0 |
0 |
0 |
6 |
121 |
441 |
214 |
47 |
| VCDI |
0 |
0 |
0 |
32 |
112 |
3659 |
15081 |
31881 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5270 |
2853 |
66 |
77 |
1 |
0 |
0 |
0 |
| OW |
0 |
145 |
78 |
264 |
60 |
6 |
0 |
0 |
| VODI |
0 |
0 |
4 |
123 |
258 |
36 |
0 |
0 |
| ODI |
0 |
0 |
0 |
8 |
231 |
138 |
3 |
1 |
| CDI |
0 |
0 |
0 |
8 |
124 |
429 |
270 |
45 |
| VCDI |
0 |
0 |
0 |
29 |
106 |
3683 |
15032 |
31883 |
|
Date: 2025-03-24:
| 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 |
5035 |
2942 |
21 |
84 |
3 |
0 |
0 |
0 |
| OW |
0 |
150 |
99 |
97 |
46 |
0 |
0 |
0 |
| VODI |
0 |
1 |
3 |
294 |
227 |
13 |
0 |
0 |
| ODI |
0 |
0 |
0 |
4 |
426 |
147 |
3 |
0 |
| CDI |
0 |
0 |
0 |
4 |
81 |
674 |
114 |
48 |
| VCDI |
0 |
0 |
0 |
3 |
58 |
2341 |
11650 |
36663 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5035 |
2955 |
57 |
92 |
3 |
0 |
0 |
0 |
| OW |
0 |
138 |
59 |
241 |
77 |
4 |
0 |
0 |
| VODI |
0 |
0 |
7 |
141 |
238 |
41 |
0 |
0 |
| ODI |
0 |
0 |
0 |
2 |
248 |
157 |
13 |
1 |
| CDI |
0 |
0 |
0 |
2 |
198 |
441 |
435 |
68 |
| VCDI |
0 |
0 |
0 |
8 |
77 |
2532 |
11319 |
36642 |
|
Date: 2025-03-26:
| 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 |
5077 |
2930 |
32 |
49 |
0 |
0 |
0 |
0 |
| OW |
0 |
229 |
106 |
128 |
35 |
0 |
0 |
0 |
| VODI |
0 |
1 |
24 |
275 |
135 |
26 |
0 |
0 |
| ODI |
0 |
0 |
0 |
37 |
280 |
169 |
0 |
0 |
| CDI |
0 |
0 |
0 |
6 |
220 |
509 |
167 |
51 |
| VCDI |
0 |
0 |
0 |
8 |
84 |
2138 |
8486 |
40029 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5077 |
3029 |
94 |
136 |
1 |
0 |
0 |
0 |
| OW |
0 |
129 |
58 |
189 |
78 |
1 |
0 |
0 |
| VODI |
0 |
2 |
10 |
144 |
188 |
76 |
0 |
0 |
| ODI |
0 |
0 |
0 |
19 |
214 |
160 |
1 |
0 |
| CDI |
0 |
0 |
0 |
2 |
186 |
541 |
249 |
79 |
| VCDI |
0 |
0 |
0 |
13 |
87 |
2064 |
8403 |
40001 |
|
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 |
5074 |
2897 |
28 |
47 |
1 |
0 |
0 |
0 |
| OW |
0 |
300 |
67 |
145 |
46 |
11 |
0 |
0 |
| VODI |
0 |
37 |
35 |
236 |
127 |
34 |
4 |
0 |
| ODI |
0 |
0 |
5 |
71 |
317 |
137 |
11 |
0 |
| CDI |
0 |
0 |
0 |
4 |
285 |
584 |
237 |
62 |
| VCDI |
0 |
0 |
0 |
2 |
136 |
2482 |
10134 |
37675 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
5072 |
3026 |
71 |
128 |
4 |
0 |
0 |
0 |
| OW |
2 |
162 |
30 |
181 |
70 |
18 |
0 |
0 |
| VODI |
0 |
45 |
29 |
130 |
210 |
81 |
5 |
0 |
| ODI |
0 |
1 |
5 |
54 |
273 |
188 |
8 |
4 |
| CDI |
0 |
0 |
0 |
9 |
204 |
556 |
337 |
82 |
| VCDI |
0 |
0 |
0 |
3 |
151 |
2405 |
10036 |
37651 |
|
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