Validation of sea ice concentration - American sector
Bulletin date: 2025-01-02
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2024-12-27:
| 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 |
197 |
925 |
19 |
10 |
0 |
0 |
0 |
0 |
| OW |
0 |
742 |
95 |
112 |
11 |
0 |
0 |
0 |
| VODI |
0 |
396 |
73 |
235 |
292 |
0 |
0 |
0 |
| ODI |
0 |
106 |
51 |
323 |
437 |
177 |
0 |
0 |
| CDI |
0 |
10 |
19 |
143 |
443 |
692 |
412 |
4 |
| VCDI |
0 |
0 |
0 |
8 |
287 |
1832 |
11942 |
25873 |
|
...date precedes bulletin
|
Date: 2024-12-29:
| 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 |
211 |
938 |
14 |
5 |
0 |
0 |
0 |
0 |
| OW |
0 |
828 |
69 |
60 |
2 |
0 |
0 |
0 |
| VODI |
16 |
468 |
97 |
369 |
271 |
9 |
0 |
0 |
| ODI |
5 |
160 |
62 |
150 |
478 |
92 |
0 |
0 |
| CDI |
0 |
52 |
13 |
69 |
349 |
1035 |
141 |
9 |
| VCDI |
0 |
42 |
10 |
25 |
143 |
1834 |
9532 |
28308 |
|
...date precedes bulletin
|
Date: 2024-12-31:
| 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 |
453 |
1298 |
10 |
6 |
0 |
0 |
0 |
0 |
| OW |
6 |
681 |
174 |
266 |
30 |
0 |
0 |
0 |
| VODI |
0 |
49 |
84 |
398 |
401 |
18 |
0 |
0 |
| ODI |
0 |
5 |
8 |
155 |
691 |
121 |
2 |
0 |
| CDI |
0 |
11 |
6 |
79 |
429 |
546 |
31 |
6 |
| VCDI |
0 |
0 |
1 |
40 |
223 |
1818 |
10206 |
27614 |
|
...date precedes bulletin
|
Date: 2025-01-02:
| 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 |
279 |
1446 |
60 |
66 |
2 |
0 |
0 |
0 |
| OW |
1 |
479 |
109 |
334 |
196 |
30 |
0 |
0 |
| VODI |
0 |
105 |
63 |
159 |
180 |
225 |
29 |
0 |
| ODI |
0 |
18 |
15 |
126 |
76 |
205 |
156 |
0 |
| CDI |
0 |
6 |
7 |
58 |
85 |
345 |
290 |
0 |
| VCDI |
0 |
9 |
12 |
41 |
135 |
2367 |
12249 |
25903 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
280 |
1669 |
94 |
132 |
25 |
0 |
0 |
0 |
| OW |
0 |
276 |
79 |
302 |
238 |
46 |
0 |
0 |
| VODI |
0 |
99 |
61 |
155 |
158 |
236 |
33 |
0 |
| ODI |
0 |
12 |
24 |
106 |
55 |
201 |
96 |
0 |
| CDI |
0 |
6 |
6 |
61 |
71 |
390 |
421 |
0 |
| VCDI |
0 |
1 |
2 |
28 |
127 |
2299 |
12174 |
25903 |
|
Date: 2025-01-04:
| 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 |
424 |
1464 |
68 |
58 |
8 |
0 |
0 |
0 |
| OW |
114 |
303 |
63 |
193 |
212 |
31 |
0 |
0 |
| VODI |
4 |
185 |
86 |
137 |
157 |
88 |
7 |
0 |
| ODI |
0 |
27 |
18 |
120 |
104 |
107 |
15 |
0 |
| CDI |
0 |
37 |
8 |
63 |
115 |
160 |
57 |
0 |
| VCDI |
0 |
27 |
13 |
29 |
163 |
2915 |
11350 |
26936 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
525 |
1612 |
92 |
119 |
71 |
5 |
0 |
0 |
| OW |
17 |
195 |
57 |
163 |
196 |
54 |
1 |
0 |
| VODI |
0 |
158 |
71 |
144 |
140 |
94 |
14 |
0 |
| ODI |
0 |
43 |
19 |
107 |
101 |
94 |
18 |
0 |
| CDI |
0 |
30 |
9 |
43 |
98 |
147 |
59 |
0 |
| VCDI |
0 |
5 |
8 |
24 |
153 |
2907 |
11337 |
26936 |
|
Date: 2025-01-06:
| 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 |
189 |
1610 |
52 |
56 |
14 |
0 |
0 |
0 |
| OW |
17 |
213 |
71 |
187 |
85 |
18 |
0 |
0 |
| VODI |
2 |
100 |
61 |
420 |
190 |
73 |
1 |
0 |
| ODI |
0 |
5 |
2 |
57 |
78 |
147 |
24 |
0 |
| CDI |
0 |
1 |
1 |
15 |
23 |
357 |
119 |
15 |
| VCDI |
0 |
0 |
1 |
17 |
101 |
2049 |
10334 |
29161 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
190 |
1699 |
122 |
272 |
132 |
104 |
2 |
0 |
| OW |
18 |
127 |
23 |
136 |
114 |
122 |
31 |
0 |
| VODI |
0 |
77 |
32 |
168 |
81 |
93 |
90 |
0 |
| ODI |
0 |
21 |
7 |
96 |
40 |
102 |
85 |
0 |
| CDI |
0 |
5 |
3 |
65 |
20 |
153 |
110 |
8 |
| VCDI |
0 |
0 |
1 |
15 |
104 |
2070 |
10160 |
29168 |
|
Date: 2025-01-08:
| 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 |
104 |
1153 |
52 |
95 |
90 |
0 |
0 |
0 |
| OW |
8 |
124 |
36 |
74 |
282 |
7 |
0 |
0 |
| VODI |
1 |
25 |
17 |
144 |
426 |
158 |
10 |
0 |
| ODI |
0 |
0 |
0 |
49 |
235 |
215 |
39 |
0 |
| CDI |
0 |
0 |
0 |
14 |
17 |
264 |
166 |
1 |
| VCDI |
0 |
0 |
0 |
0 |
54 |
2305 |
10956 |
28745 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
106 |
1255 |
72 |
148 |
491 |
108 |
20 |
0 |
| OW |
7 |
37 |
24 |
105 |
150 |
209 |
52 |
0 |
| VODI |
0 |
9 |
9 |
85 |
172 |
222 |
94 |
0 |
| ODI |
0 |
1 |
0 |
26 |
142 |
100 |
117 |
0 |
| CDI |
0 |
0 |
0 |
11 |
96 |
73 |
188 |
8 |
| VCDI |
0 |
0 |
0 |
1 |
53 |
2237 |
10700 |
28738 |
|
Date: 2025-01-10:
| 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 |
7 |
815 |
36 |
72 |
39 |
0 |
0 |
0 |
| OW |
4 |
163 |
44 |
135 |
88 |
92 |
5 |
0 |
| VODI |
2 |
51 |
26 |
140 |
220 |
303 |
81 |
0 |
| ODI |
0 |
0 |
4 |
60 |
225 |
167 |
124 |
0 |
| CDI |
0 |
4 |
10 |
32 |
163 |
242 |
348 |
1 |
| VCDI |
0 |
0 |
0 |
7 |
56 |
841 |
12889 |
28370 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
9 |
932 |
71 |
200 |
204 |
457 |
102 |
0 |
| OW |
2 |
75 |
21 |
65 |
41 |
122 |
137 |
0 |
| VODI |
2 |
22 |
17 |
89 |
169 |
92 |
235 |
0 |
| ODI |
0 |
0 |
1 |
54 |
127 |
59 |
192 |
0 |
| CDI |
0 |
4 |
8 |
23 |
154 |
75 |
224 |
1 |
| VCDI |
0 |
0 |
2 |
15 |
96 |
840 |
12557 |
28370 |
|
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