Validation of sea ice concentration - American sector
Bulletin date: 2023-05-04
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2023-04-30:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
3 |
0 |
0 |
3 |
0 |
0 |
0 |
| VODI |
0 |
11 |
0 |
1 |
13 |
6 |
4 |
0 |
| ODI |
0 |
5 |
7 |
5 |
30 |
32 |
52 |
0 |
| CDI |
0 |
6 |
16 |
92 |
212 |
288 |
458 |
0 |
| VCDI |
0 |
3 |
9 |
100 |
434 |
1625 |
18629 |
23822 |
|
...date precedes bulletin
|
Date: 2023-05-02:
| 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 |
0 |
4 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
21 |
4 |
1 |
7 |
0 |
0 |
0 |
| VODI |
0 |
18 |
15 |
26 |
26 |
5 |
0 |
0 |
| ODI |
0 |
17 |
12 |
78 |
103 |
43 |
21 |
0 |
| CDI |
0 |
15 |
10 |
155 |
532 |
593 |
230 |
7 |
| VCDI |
0 |
263 |
37 |
253 |
668 |
1805 |
15861 |
25036 |
|
...date precedes bulletin
|
Date: 2023-05-04:
| 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 |
0 |
7 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
23 |
7 |
4 |
5 |
0 |
1 |
0 |
| VODI |
0 |
31 |
14 |
30 |
26 |
11 |
18 |
0 |
| ODI |
0 |
26 |
27 |
98 |
100 |
62 |
51 |
0 |
| CDI |
0 |
22 |
16 |
151 |
451 |
590 |
448 |
3 |
| VCDI |
0 |
39 |
44 |
199 |
469 |
2238 |
18720 |
21935 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
9 |
0 |
0 |
2 |
0 |
0 |
0 |
| OW |
0 |
22 |
2 |
2 |
9 |
1 |
0 |
0 |
| VODI |
0 |
29 |
19 |
35 |
25 |
9 |
17 |
0 |
| ODI |
0 |
30 |
27 |
95 |
116 |
60 |
52 |
0 |
| CDI |
0 |
19 |
16 |
152 |
428 |
605 |
471 |
1 |
| VCDI |
0 |
39 |
44 |
198 |
471 |
2226 |
18698 |
21937 |
|
Date: 2023-05-06:
| 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 |
0 |
6 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
20 |
3 |
8 |
1 |
0 |
0 |
0 |
| VODI |
0 |
23 |
21 |
40 |
33 |
18 |
17 |
0 |
| ODI |
0 |
20 |
10 |
83 |
138 |
138 |
36 |
0 |
| CDI |
0 |
28 |
22 |
135 |
368 |
564 |
715 |
0 |
| VCDI |
0 |
55 |
39 |
142 |
497 |
2806 |
18077 |
21803 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
5 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
21 |
2 |
4 |
4 |
0 |
0 |
0 |
| VODI |
0 |
24 |
21 |
39 |
29 |
13 |
15 |
0 |
| ODI |
0 |
22 |
14 |
99 |
142 |
137 |
39 |
0 |
| CDI |
0 |
24 |
19 |
121 |
375 |
609 |
733 |
0 |
| VCDI |
0 |
56 |
39 |
145 |
487 |
2767 |
18058 |
21803 |
|
Date: 2023-05-08:
| 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 |
0 |
20 |
1 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
79 |
16 |
15 |
5 |
0 |
0 |
0 |
| VODI |
0 |
49 |
41 |
89 |
69 |
14 |
1 |
0 |
| ODI |
0 |
33 |
36 |
91 |
201 |
122 |
16 |
0 |
| CDI |
0 |
76 |
55 |
185 |
380 |
694 |
418 |
4 |
| VCDI |
0 |
33 |
20 |
175 |
432 |
2733 |
20892 |
18871 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
6 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
48 |
4 |
6 |
8 |
1 |
0 |
0 |
| VODI |
0 |
40 |
27 |
51 |
63 |
25 |
5 |
0 |
| ODI |
0 |
41 |
26 |
80 |
134 |
161 |
52 |
0 |
| CDI |
0 |
65 |
44 |
158 |
307 |
527 |
822 |
1 |
| VCDI |
0 |
90 |
68 |
260 |
575 |
2849 |
20448 |
18874 |
|
Date: 2023-05-10:
| 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 |
0 |
41 |
12 |
12 |
3 |
0 |
0 |
0 |
| OW |
0 |
39 |
14 |
35 |
13 |
3 |
0 |
0 |
| VODI |
0 |
46 |
44 |
62 |
94 |
24 |
1 |
0 |
| ODI |
0 |
25 |
28 |
79 |
175 |
166 |
22 |
0 |
| CDI |
0 |
56 |
39 |
170 |
428 |
744 |
648 |
1 |
| VCDI |
0 |
43 |
51 |
234 |
326 |
3039 |
20507 |
18642 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
10 |
2 |
2 |
2 |
0 |
0 |
0 |
| OW |
0 |
22 |
6 |
10 |
17 |
12 |
0 |
0 |
| VODI |
0 |
37 |
29 |
56 |
73 |
30 |
6 |
0 |
| ODI |
0 |
40 |
26 |
92 |
158 |
181 |
68 |
0 |
| CDI |
0 |
56 |
45 |
130 |
349 |
654 |
1133 |
1 |
| VCDI |
0 |
85 |
80 |
302 |
440 |
3099 |
19971 |
18642 |
|
Date: 2023-05-12:
| 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 |
32 |
10 |
31 |
4 |
0 |
0 |
0 |
| OW |
0 |
33 |
7 |
45 |
37 |
6 |
0 |
0 |
| VODI |
0 |
71 |
29 |
63 |
107 |
34 |
1 |
0 |
| ODI |
0 |
16 |
36 |
116 |
179 |
242 |
34 |
0 |
| CDI |
0 |
126 |
33 |
183 |
487 |
947 |
607 |
0 |
| VCDI |
0 |
112 |
52 |
340 |
603 |
4024 |
17564 |
19655 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
10 |
3 |
10 |
14 |
5 |
0 |
0 |
| OW |
0 |
28 |
3 |
27 |
28 |
3 |
1 |
0 |
| VODI |
0 |
46 |
22 |
64 |
90 |
52 |
5 |
0 |
| ODI |
0 |
63 |
21 |
111 |
151 |
217 |
33 |
0 |
| CDI |
0 |
93 |
30 |
170 |
506 |
1070 |
1032 |
0 |
| VCDI |
0 |
150 |
88 |
396 |
628 |
3906 |
17135 |
19655 |
|
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