Validation of sea ice concentration - American sector
Bulletin date: 2023-04-20
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2023-04-14:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
7 |
26 |
52 |
10 |
| VCDI |
0 |
0 |
0 |
0 |
46 |
920 |
10793 |
34012 |
|
...date precedes bulletin
|
Date: 2023-04-16:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| CDI |
0 |
0 |
0 |
9 |
14 |
9 |
12 |
8 |
| VCDI |
0 |
0 |
0 |
50 |
298 |
915 |
11282 |
33269 |
|
...date precedes bulletin
|
Date: 2023-04-18:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| ODI |
0 |
0 |
1 |
12 |
15 |
8 |
0 |
0 |
| CDI |
0 |
2 |
1 |
33 |
85 |
89 |
78 |
6 |
| VCDI |
0 |
0 |
14 |
117 |
381 |
806 |
11931 |
32287 |
|
...date precedes bulletin
|
Date: 2023-04-20:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
8 |
11 |
1 |
0 |
0 |
0 |
| ODI |
0 |
0 |
9 |
60 |
32 |
11 |
8 |
0 |
| CDI |
0 |
1 |
9 |
63 |
108 |
129 |
199 |
6 |
| VCDI |
0 |
0 |
4 |
105 |
496 |
919 |
12258 |
31429 |
|
|
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 |
7 |
8 |
1 |
0 |
0 |
0 |
| ODI |
0 |
0 |
10 |
50 |
30 |
10 |
7 |
0 |
| CDI |
0 |
1 |
6 |
67 |
111 |
125 |
200 |
6 |
| VCDI |
0 |
0 |
7 |
114 |
495 |
924 |
12258 |
31429 |
|
Date: 2023-04-22:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
3 |
1 |
0 |
4 |
0 |
0 |
| ODI |
0 |
2 |
8 |
47 |
18 |
16 |
6 |
0 |
| CDI |
0 |
0 |
2 |
76 |
114 |
192 |
227 |
6 |
| VCDI |
0 |
1 |
1 |
35 |
343 |
1496 |
11954 |
31314 |
|
|
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 |
2 |
3 |
1 |
4 |
0 |
0 |
| ODI |
0 |
2 |
8 |
40 |
14 |
12 |
9 |
0 |
| CDI |
0 |
0 |
3 |
79 |
116 |
208 |
213 |
4 |
| VCDI |
0 |
1 |
1 |
37 |
344 |
1484 |
11965 |
31316 |
|
Date: 2023-04-24:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
3 |
1 |
1 |
1 |
3 |
5 |
0 |
| ODI |
0 |
4 |
12 |
29 |
38 |
22 |
27 |
0 |
| CDI |
0 |
1 |
8 |
93 |
156 |
260 |
275 |
4 |
| VCDI |
0 |
0 |
4 |
65 |
325 |
2058 |
12832 |
29639 |
|
|
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 |
4 |
2 |
2 |
2 |
4 |
6 |
0 |
| ODI |
0 |
3 |
11 |
35 |
39 |
19 |
25 |
0 |
| CDI |
0 |
1 |
8 |
98 |
151 |
252 |
274 |
1 |
| VCDI |
0 |
0 |
4 |
53 |
328 |
2068 |
12834 |
29642 |
|
Date: 2023-04-26:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
13 |
0 |
1 |
0 |
0 |
8 |
0 |
| ODI |
0 |
7 |
10 |
15 |
12 |
22 |
48 |
0 |
| CDI |
0 |
11 |
10 |
57 |
119 |
282 |
396 |
4 |
| VCDI |
0 |
3 |
5 |
61 |
336 |
1666 |
13668 |
29111 |
|
|
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 |
5 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
14 |
3 |
3 |
2 |
1 |
6 |
0 |
| ODI |
0 |
2 |
9 |
24 |
18 |
16 |
35 |
0 |
| CDI |
0 |
11 |
6 |
67 |
153 |
329 |
472 |
2 |
| VCDI |
0 |
3 |
7 |
40 |
294 |
1624 |
13607 |
29113 |
|
Date: 2023-04-28:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
5 |
0 |
0 |
0 |
2 |
0 |
0 |
| VODI |
0 |
13 |
0 |
1 |
4 |
12 |
4 |
0 |
| ODI |
0 |
11 |
5 |
13 |
29 |
34 |
47 |
0 |
| CDI |
0 |
4 |
13 |
77 |
195 |
279 |
331 |
0 |
| VCDI |
0 |
2 |
12 |
112 |
528 |
2122 |
16319 |
25692 |
|
|
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 |
6 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
12 |
0 |
1 |
1 |
6 |
8 |
0 |
| ODI |
0 |
12 |
5 |
25 |
29 |
22 |
28 |
0 |
| CDI |
0 |
3 |
13 |
101 |
264 |
335 |
331 |
0 |
| VCDI |
0 |
2 |
12 |
76 |
462 |
2086 |
16334 |
25692 |
|
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