Validation of sea ice concentration - American sector
Bulletin date: 2023-04-27
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2023-04-21:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
1 |
3 |
13 |
6 |
1 |
0 |
0 |
| ODI |
0 |
0 |
16 |
53 |
12 |
19 |
12 |
0 |
| CDI |
0 |
4 |
13 |
64 |
90 |
140 |
186 |
7 |
| VCDI |
0 |
1 |
5 |
81 |
510 |
1022 |
10834 |
32773 |
|
...date precedes bulletin
|
Date: 2023-04-23:
| 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 |
1 |
1 |
2 |
0 |
4 |
0 |
0 |
| ODI |
0 |
1 |
12 |
41 |
23 |
22 |
9 |
0 |
| CDI |
0 |
1 |
12 |
69 |
136 |
246 |
243 |
4 |
| VCDI |
0 |
1 |
4 |
46 |
253 |
1540 |
12666 |
30529 |
|
...date precedes bulletin
|
Date: 2023-04-25:
| 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 |
12 |
1 |
0 |
0 |
0 |
7 |
0 |
| ODI |
0 |
12 |
6 |
15 |
25 |
22 |
40 |
0 |
| CDI |
0 |
5 |
10 |
66 |
156 |
257 |
391 |
4 |
| VCDI |
0 |
2 |
7 |
69 |
373 |
1774 |
13766 |
28846 |
|
...date precedes bulletin
|
Date: 2023-04-27:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
3 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
12 |
0 |
1 |
1 |
6 |
7 |
0 |
| ODI |
0 |
11 |
11 |
12 |
14 |
40 |
48 |
0 |
| CDI |
0 |
8 |
13 |
70 |
151 |
300 |
323 |
4 |
| VCDI |
0 |
3 |
7 |
92 |
434 |
2067 |
15559 |
26669 |
|
|
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 |
4 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
14 |
1 |
1 |
1 |
6 |
13 |
0 |
| ODI |
0 |
12 |
11 |
16 |
14 |
47 |
48 |
1 |
| CDI |
0 |
3 |
11 |
83 |
195 |
303 |
298 |
3 |
| VCDI |
0 |
4 |
8 |
75 |
390 |
2057 |
15578 |
26669 |
|
Date: 2023-04-29:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
4 |
0 |
0 |
1 |
5 |
0 |
0 |
| VODI |
0 |
11 |
1 |
1 |
15 |
6 |
5 |
0 |
| ODI |
0 |
6 |
8 |
6 |
38 |
31 |
40 |
0 |
| CDI |
0 |
4 |
8 |
74 |
205 |
252 |
377 |
0 |
| VCDI |
0 |
11 |
14 |
141 |
670 |
1913 |
16535 |
25484 |
|
|
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 |
4 |
0 |
0 |
1 |
5 |
0 |
0 |
| VODI |
0 |
11 |
1 |
1 |
12 |
7 |
6 |
0 |
| ODI |
0 |
6 |
9 |
10 |
42 |
34 |
55 |
0 |
| CDI |
0 |
2 |
5 |
91 |
272 |
268 |
363 |
0 |
| VCDI |
0 |
12 |
16 |
120 |
602 |
1893 |
16533 |
25484 |
|
Date: 2023-05-01:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
13 |
0 |
0 |
0 |
1 |
0 |
0 |
| VODI |
0 |
21 |
10 |
20 |
15 |
6 |
0 |
0 |
| ODI |
0 |
15 |
11 |
64 |
83 |
34 |
11 |
0 |
| CDI |
0 |
20 |
16 |
124 |
434 |
647 |
247 |
0 |
| VCDI |
0 |
185 |
24 |
160 |
383 |
1463 |
15257 |
26602 |
|
|
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 |
3 |
0 |
0 |
1 |
3 |
0 |
0 |
| VODI |
0 |
12 |
1 |
0 |
15 |
10 |
9 |
0 |
| ODI |
0 |
12 |
13 |
28 |
32 |
53 |
65 |
0 |
| CDI |
0 |
25 |
12 |
129 |
316 |
362 |
367 |
0 |
| VCDI |
0 |
202 |
35 |
211 |
551 |
1723 |
15074 |
26602 |
|
Date: 2023-05-03:
| 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 |
8 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
20 |
6 |
2 |
6 |
0 |
0 |
0 |
| VODI |
0 |
25 |
14 |
24 |
31 |
10 |
9 |
0 |
| ODI |
0 |
21 |
15 |
89 |
96 |
53 |
39 |
0 |
| CDI |
0 |
33 |
25 |
173 |
474 |
552 |
376 |
11 |
| VCDI |
0 |
78 |
36 |
161 |
568 |
2238 |
17569 |
23104 |
|
|
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 |
3 |
0 |
0 |
8 |
0 |
9 |
0 |
| VODI |
0 |
24 |
5 |
7 |
32 |
20 |
37 |
0 |
| ODI |
0 |
21 |
21 |
58 |
81 |
72 |
69 |
0 |
| CDI |
0 |
29 |
25 |
171 |
386 |
417 |
349 |
11 |
| VCDI |
0 |
108 |
45 |
213 |
668 |
2344 |
17529 |
23104 |
|
Date: 2023-05-05:
| 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 |
8 |
1 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
17 |
7 |
7 |
5 |
0 |
0 |
0 |
| VODI |
0 |
30 |
13 |
36 |
29 |
11 |
20 |
0 |
| ODI |
0 |
20 |
17 |
92 |
106 |
79 |
45 |
0 |
| CDI |
0 |
21 |
26 |
141 |
506 |
631 |
541 |
0 |
| VCDI |
0 |
39 |
21 |
181 |
493 |
2544 |
18875 |
21304 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
2 |
0 |
0 |
1 |
0 |
5 |
0 |
| OW |
0 |
7 |
5 |
6 |
12 |
9 |
23 |
0 |
| VODI |
0 |
28 |
15 |
38 |
43 |
54 |
57 |
0 |
| ODI |
0 |
27 |
12 |
76 |
84 |
88 |
65 |
0 |
| CDI |
0 |
21 |
16 |
107 |
336 |
373 |
438 |
60 |
| VCDI |
0 |
50 |
37 |
230 |
663 |
2741 |
18893 |
21244 |
|
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