Validation of sea ice concentration - American sector
Bulletin date: 2023-05-18
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2023-05-14:
| 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 |
50 |
12 |
16 |
0 |
0 |
0 |
0 |
| OW |
0 |
49 |
15 |
77 |
37 |
1 |
0 |
0 |
| VODI |
0 |
65 |
41 |
121 |
213 |
68 |
4 |
0 |
| ODI |
0 |
39 |
34 |
160 |
274 |
168 |
53 |
0 |
| CDI |
0 |
52 |
50 |
245 |
749 |
794 |
499 |
3 |
| VCDI |
0 |
124 |
84 |
588 |
2541 |
6837 |
16928 |
14875 |
|
...date precedes bulletin
|
Date: 2023-05-16:
| 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 |
219 |
16 |
8 |
0 |
0 |
0 |
0 |
| OW |
0 |
189 |
58 |
100 |
11 |
0 |
0 |
0 |
| VODI |
0 |
174 |
83 |
258 |
164 |
35 |
9 |
0 |
| ODI |
0 |
62 |
59 |
213 |
298 |
229 |
75 |
0 |
| CDI |
0 |
49 |
39 |
189 |
379 |
1062 |
881 |
17 |
| VCDI |
0 |
1 |
7 |
73 |
378 |
4845 |
19163 |
16523 |
|
...date precedes bulletin
|
Date: 2023-05-18:
| 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 |
282 |
16 |
16 |
0 |
0 |
0 |
0 |
| OW |
0 |
218 |
54 |
94 |
29 |
2 |
0 |
0 |
| VODI |
0 |
209 |
96 |
216 |
175 |
86 |
21 |
0 |
| ODI |
0 |
93 |
56 |
180 |
296 |
222 |
129 |
0 |
| CDI |
0 |
55 |
31 |
201 |
334 |
970 |
803 |
1 |
| VCDI |
0 |
15 |
24 |
154 |
590 |
3060 |
20914 |
16224 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
282 |
18 |
23 |
0 |
0 |
0 |
0 |
| OW |
0 |
192 |
47 |
82 |
32 |
4 |
0 |
0 |
| VODI |
0 |
233 |
97 |
225 |
168 |
75 |
19 |
0 |
| ODI |
0 |
87 |
59 |
175 |
293 |
233 |
108 |
0 |
| CDI |
0 |
66 |
34 |
199 |
336 |
953 |
741 |
1 |
| VCDI |
0 |
12 |
22 |
157 |
595 |
3075 |
20999 |
16224 |
|
Date: 2023-05-20:
| 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 |
229 |
10 |
16 |
0 |
0 |
0 |
0 |
| OW |
0 |
321 |
56 |
91 |
60 |
9 |
0 |
0 |
| VODI |
0 |
263 |
117 |
241 |
212 |
106 |
48 |
0 |
| ODI |
0 |
106 |
56 |
236 |
315 |
266 |
123 |
0 |
| CDI |
0 |
98 |
63 |
180 |
329 |
694 |
1021 |
0 |
| VCDI |
0 |
44 |
15 |
199 |
775 |
4881 |
23795 |
10891 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
320 |
19 |
20 |
1 |
0 |
0 |
0 |
| OW |
0 |
222 |
56 |
83 |
49 |
9 |
3 |
0 |
| VODI |
0 |
257 |
99 |
237 |
229 |
103 |
38 |
0 |
| ODI |
0 |
109 |
65 |
240 |
296 |
222 |
118 |
0 |
| CDI |
0 |
108 |
53 |
155 |
304 |
705 |
917 |
0 |
| VCDI |
0 |
45 |
25 |
228 |
812 |
4917 |
23911 |
10891 |
|
Date: 2023-05-22:
| 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 |
623 |
50 |
44 |
3 |
0 |
0 |
0 |
| OW |
0 |
288 |
132 |
177 |
41 |
3 |
1 |
0 |
| VODI |
0 |
157 |
118 |
391 |
229 |
46 |
4 |
0 |
| ODI |
0 |
32 |
49 |
223 |
507 |
222 |
59 |
0 |
| CDI |
0 |
19 |
15 |
167 |
518 |
773 |
508 |
1 |
| VCDI |
0 |
1 |
1 |
40 |
462 |
4010 |
23047 |
12905 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
378 |
26 |
32 |
6 |
0 |
0 |
0 |
| OW |
0 |
306 |
67 |
111 |
90 |
36 |
1 |
0 |
| VODI |
0 |
237 |
125 |
232 |
266 |
113 |
20 |
0 |
| ODI |
0 |
92 |
72 |
287 |
297 |
275 |
111 |
0 |
| CDI |
0 |
87 |
49 |
214 |
322 |
463 |
1147 |
3 |
| VCDI |
0 |
20 |
26 |
166 |
779 |
4167 |
22340 |
12903 |
|
Date: 2023-05-24:
| 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 |
817 |
113 |
133 |
17 |
3 |
0 |
0 |
| OW |
0 |
308 |
110 |
214 |
56 |
6 |
3 |
0 |
| VODI |
0 |
198 |
94 |
294 |
342 |
69 |
18 |
0 |
| ODI |
0 |
64 |
48 |
127 |
346 |
257 |
70 |
0 |
| CDI |
0 |
38 |
51 |
185 |
278 |
691 |
697 |
0 |
| VCDI |
0 |
17 |
7 |
51 |
228 |
1637 |
22775 |
15504 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
467 |
43 |
101 |
56 |
16 |
9 |
0 |
| OW |
0 |
310 |
71 |
128 |
147 |
39 |
5 |
0 |
| VODI |
0 |
292 |
113 |
255 |
291 |
181 |
51 |
0 |
| ODI |
0 |
167 |
76 |
158 |
217 |
299 |
223 |
0 |
| CDI |
0 |
164 |
76 |
192 |
179 |
260 |
1368 |
0 |
| VCDI |
0 |
42 |
44 |
170 |
377 |
1868 |
21907 |
15504 |
|
Date: 2023-05-26:
| 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 |
833 |
136 |
97 |
22 |
11 |
2 |
0 |
| OW |
0 |
329 |
119 |
230 |
105 |
27 |
5 |
0 |
| VODI |
0 |
175 |
89 |
266 |
383 |
161 |
12 |
0 |
| ODI |
0 |
86 |
48 |
140 |
292 |
342 |
116 |
0 |
| CDI |
0 |
89 |
50 |
201 |
388 |
1094 |
821 |
3 |
| VCDI |
0 |
41 |
27 |
133 |
289 |
3415 |
20780 |
14509 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
478 |
68 |
129 |
97 |
54 |
10 |
0 |
| OW |
0 |
337 |
85 |
171 |
184 |
126 |
6 |
0 |
| VODI |
0 |
286 |
119 |
193 |
273 |
283 |
59 |
0 |
| ODI |
0 |
193 |
55 |
145 |
192 |
380 |
197 |
0 |
| CDI |
0 |
168 |
94 |
193 |
279 |
574 |
1080 |
12 |
| VCDI |
0 |
91 |
48 |
236 |
454 |
3633 |
20384 |
14500 |
|
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