Validation of sea ice concentration - American sector
Bulletin date: 2023-12-28
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2023-12-22:
| 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 |
0 |
735 |
32 |
64 |
90 |
88 |
0 |
0 |
| OW |
0 |
450 |
68 |
82 |
112 |
158 |
6 |
0 |
| VODI |
0 |
241 |
58 |
170 |
174 |
163 |
57 |
0 |
| ODI |
0 |
23 |
18 |
109 |
525 |
151 |
41 |
0 |
| CDI |
0 |
5 |
7 |
68 |
364 |
409 |
254 |
1 |
| VCDI |
0 |
0 |
0 |
20 |
177 |
2200 |
11801 |
26945 |
|
...date precedes bulletin
|
Date: 2023-12-24:
| 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 |
43 |
509 |
43 |
63 |
112 |
35 |
0 |
0 |
| OW |
27 |
287 |
69 |
112 |
115 |
122 |
0 |
0 |
| VODI |
0 |
301 |
53 |
203 |
225 |
173 |
23 |
0 |
| ODI |
0 |
61 |
16 |
131 |
460 |
135 |
34 |
0 |
| CDI |
0 |
5 |
17 |
82 |
490 |
355 |
126 |
0 |
| VCDI |
0 |
4 |
2 |
39 |
106 |
2860 |
12720 |
25708 |
|
...date precedes bulletin
|
Date: 2023-12-26:
| 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 |
0 |
357 |
35 |
26 |
7 |
0 |
0 |
0 |
| OW |
0 |
443 |
43 |
77 |
50 |
58 |
7 |
0 |
| VODI |
0 |
191 |
89 |
286 |
267 |
95 |
19 |
0 |
| ODI |
0 |
4 |
4 |
77 |
275 |
182 |
66 |
0 |
| CDI |
0 |
6 |
4 |
19 |
176 |
802 |
322 |
0 |
| VCDI |
0 |
6 |
13 |
34 |
305 |
2928 |
14363 |
24230 |
|
...date precedes bulletin
|
Date: 2023-12-28:
| 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 |
4 |
262 |
3 |
4 |
0 |
0 |
0 |
0 |
| OW |
16 |
324 |
34 |
36 |
27 |
44 |
2 |
0 |
| VODI |
0 |
237 |
71 |
200 |
215 |
121 |
23 |
0 |
| ODI |
0 |
68 |
21 |
101 |
274 |
266 |
38 |
0 |
| CDI |
0 |
7 |
2 |
35 |
148 |
738 |
177 |
0 |
| VCDI |
0 |
6 |
8 |
39 |
231 |
2959 |
14508 |
24617 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
8 |
281 |
1 |
2 |
3 |
0 |
0 |
0 |
| OW |
12 |
301 |
33 |
23 |
19 |
40 |
0 |
0 |
| VODI |
0 |
221 |
65 |
200 |
213 |
104 |
15 |
0 |
| ODI |
0 |
85 |
31 |
116 |
259 |
252 |
37 |
0 |
| CDI |
0 |
9 |
0 |
35 |
156 |
701 |
187 |
0 |
| VCDI |
0 |
7 |
9 |
39 |
245 |
3031 |
14509 |
24617 |
|
Date: 2023-12-30:
| 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 |
0 |
167 |
8 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
319 |
68 |
56 |
24 |
20 |
0 |
0 |
| VODI |
0 |
117 |
59 |
207 |
155 |
148 |
35 |
0 |
| ODI |
0 |
85 |
57 |
154 |
185 |
149 |
90 |
0 |
| CDI |
0 |
33 |
15 |
42 |
252 |
355 |
316 |
0 |
| VCDI |
0 |
2 |
5 |
38 |
228 |
2443 |
12299 |
27735 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
209 |
10 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
272 |
60 |
54 |
8 |
3 |
0 |
0 |
| VODI |
0 |
126 |
54 |
186 |
177 |
113 |
27 |
0 |
| ODI |
0 |
73 |
66 |
174 |
165 |
178 |
51 |
0 |
| CDI |
0 |
41 |
16 |
46 |
261 |
344 |
327 |
0 |
| VCDI |
0 |
2 |
6 |
37 |
233 |
2477 |
12335 |
27735 |
|
Date: 2024-01-01:
| 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 |
0 |
66 |
4 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
224 |
21 |
12 |
6 |
0 |
0 |
0 |
| VODI |
0 |
76 |
54 |
184 |
56 |
4 |
0 |
0 |
| ODI |
0 |
15 |
25 |
168 |
178 |
48 |
1 |
0 |
| CDI |
0 |
0 |
1 |
25 |
391 |
792 |
79 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
304 |
2872 |
14174 |
26083 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
36 |
3 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
152 |
18 |
28 |
15 |
0 |
0 |
0 |
| VODI |
0 |
167 |
45 |
127 |
125 |
18 |
2 |
0 |
| ODI |
0 |
22 |
22 |
93 |
178 |
167 |
33 |
0 |
| CDI |
0 |
1 |
8 |
122 |
251 |
677 |
361 |
0 |
| VCDI |
0 |
3 |
9 |
22 |
366 |
2854 |
13858 |
26083 |
|
Date: 2024-01-03:
| 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 |
0 |
5 |
1 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
68 |
25 |
31 |
11 |
0 |
0 |
0 |
| VODI |
0 |
31 |
40 |
68 |
66 |
29 |
0 |
0 |
| ODI |
0 |
0 |
0 |
82 |
179 |
59 |
0 |
0 |
| CDI |
0 |
0 |
0 |
66 |
244 |
396 |
266 |
0 |
| VCDI |
0 |
0 |
0 |
60 |
483 |
3819 |
17217 |
22620 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
18 |
3 |
7 |
13 |
1 |
0 |
0 |
| VODI |
0 |
56 |
41 |
61 |
58 |
40 |
0 |
0 |
| ODI |
0 |
29 |
19 |
67 |
112 |
171 |
42 |
0 |
| CDI |
0 |
0 |
3 |
45 |
162 |
414 |
482 |
0 |
| VCDI |
0 |
0 |
0 |
127 |
638 |
3677 |
16959 |
22620 |
|
Date: 2024-01-05:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
12 |
77 |
33 |
0 |
0 |
| ODI |
0 |
0 |
0 |
11 |
142 |
44 |
0 |
0 |
| CDI |
0 |
0 |
0 |
18 |
168 |
302 |
163 |
5 |
| VCDI |
0 |
0 |
15 |
174 |
633 |
3638 |
13844 |
26587 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
3 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
9 |
36 |
15 |
0 |
0 |
| ODI |
0 |
0 |
0 |
14 |
145 |
66 |
1 |
0 |
| CDI |
0 |
0 |
0 |
4 |
155 |
374 |
447 |
24 |
| VCDI |
0 |
0 |
15 |
188 |
681 |
3562 |
13559 |
26568 |
|
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