Validation of sea ice concentration
Bulletin date: 2021-05-27
Model vs. observations, sea ice class contingency tables
Date: 2021-05-21:
| 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 |
13341 |
5979 |
1713 |
781 |
372 |
144 |
125 |
0 |
| OW |
0 |
1 |
75 |
258 |
205 |
136 |
82 |
0 |
| VODI |
0 |
3 |
35 |
214 |
260 |
237 |
204 |
15 |
| ODI |
0 |
0 |
17 |
125 |
203 |
348 |
481 |
1 |
| CDI |
0 |
0 |
17 |
80 |
198 |
734 |
2104 |
0 |
| VCDI |
0 |
0 |
13 |
43 |
45 |
224 |
4911 |
4435 |
|
...date precedes bulletin
|
Date: 2021-05-25:
| 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 |
13424 |
5968 |
1418 |
1189 |
304 |
144 |
130 |
0 |
| OW |
0 |
0 |
96 |
442 |
150 |
58 |
123 |
8 |
| VODI |
0 |
0 |
58 |
356 |
349 |
144 |
228 |
6 |
| ODI |
0 |
0 |
20 |
157 |
395 |
404 |
427 |
1 |
| CDI |
0 |
0 |
6 |
97 |
383 |
735 |
2199 |
0 |
| VCDI |
0 |
0 |
10 |
65 |
93 |
763 |
4625 |
3184 |
|
...date precedes bulletin
|
Date: 2021-05-27:
| 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 |
13548 |
5901 |
1372 |
1036 |
537 |
162 |
226 |
10 |
| OW |
0 |
0 |
148 |
325 |
284 |
103 |
103 |
2 |
| VODI |
0 |
0 |
90 |
202 |
416 |
206 |
259 |
2 |
| ODI |
0 |
0 |
36 |
165 |
424 |
416 |
511 |
1 |
| CDI |
0 |
0 |
15 |
163 |
315 |
540 |
2448 |
30 |
| VCDI |
0 |
0 |
2 |
36 |
51 |
292 |
3620 |
4162 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13548 |
5901 |
1397 |
1077 |
596 |
173 |
241 |
12 |
| OW |
0 |
0 |
131 |
294 |
250 |
111 |
111 |
0 |
| VODI |
0 |
0 |
88 |
195 |
400 |
189 |
251 |
2 |
| ODI |
0 |
0 |
32 |
165 |
402 |
413 |
511 |
1 |
| CDI |
0 |
0 |
12 |
159 |
326 |
546 |
2423 |
21 |
| VCDI |
0 |
0 |
3 |
37 |
53 |
287 |
3630 |
4171 |
|
Date: 2021-05-31:
| 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 |
13938 |
5930 |
1173 |
1584 |
555 |
160 |
130 |
1 |
| OW |
0 |
0 |
64 |
407 |
236 |
109 |
86 |
10 |
| VODI |
0 |
0 |
16 |
351 |
548 |
327 |
163 |
2 |
| ODI |
0 |
0 |
12 |
83 |
442 |
536 |
465 |
1 |
| CDI |
0 |
0 |
23 |
98 |
178 |
785 |
2519 |
25 |
| VCDI |
0 |
0 |
2 |
44 |
42 |
135 |
3442 |
3537 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13938 |
5930 |
1141 |
1531 |
581 |
197 |
180 |
11 |
| OW |
0 |
0 |
77 |
370 |
240 |
140 |
107 |
0 |
| VODI |
0 |
0 |
32 |
325 |
387 |
326 |
322 |
2 |
| ODI |
0 |
0 |
8 |
152 |
359 |
342 |
508 |
1 |
| CDI |
0 |
0 |
16 |
85 |
353 |
840 |
1920 |
28 |
| VCDI |
0 |
0 |
16 |
104 |
81 |
207 |
3768 |
3534 |
|
Date: 2021-06-02:
| 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 |
14327 |
5729 |
1344 |
1767 |
454 |
101 |
172 |
11 |
| OW |
0 |
0 |
61 |
505 |
284 |
94 |
118 |
0 |
| VODI |
0 |
0 |
27 |
281 |
513 |
175 |
268 |
2 |
| ODI |
0 |
0 |
33 |
144 |
298 |
309 |
782 |
2 |
| CDI |
0 |
0 |
11 |
91 |
147 |
483 |
2546 |
26 |
| VCDI |
0 |
0 |
0 |
49 |
60 |
98 |
3395 |
3452 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14327 |
5729 |
1198 |
1628 |
465 |
131 |
280 |
11 |
| OW |
0 |
0 |
127 |
409 |
219 |
81 |
152 |
0 |
| VODI |
0 |
0 |
77 |
406 |
411 |
163 |
393 |
2 |
| ODI |
0 |
0 |
45 |
178 |
302 |
170 |
717 |
1 |
| CDI |
0 |
0 |
29 |
139 |
281 |
568 |
2231 |
14 |
| VCDI |
0 |
0 |
0 |
77 |
78 |
147 |
3508 |
3465 |
|
Date: 2021-06-04:
| 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 |
14256 |
5688 |
1717 |
1746 |
562 |
144 |
161 |
12 |
| OW |
0 |
0 |
42 |
333 |
481 |
139 |
90 |
0 |
| VODI |
0 |
0 |
9 |
225 |
425 |
325 |
289 |
2 |
| ODI |
0 |
0 |
5 |
111 |
265 |
418 |
884 |
1 |
| CDI |
0 |
0 |
5 |
116 |
177 |
574 |
2208 |
16 |
| VCDI |
0 |
0 |
0 |
17 |
28 |
65 |
3106 |
3517 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14256 |
5688 |
1537 |
1500 |
551 |
177 |
262 |
12 |
| OW |
0 |
0 |
118 |
364 |
297 |
141 |
163 |
0 |
| VODI |
0 |
0 |
98 |
322 |
441 |
258 |
345 |
2 |
| ODI |
0 |
0 |
17 |
159 |
342 |
308 |
743 |
1 |
| CDI |
0 |
0 |
8 |
158 |
256 |
678 |
1994 |
4 |
| VCDI |
0 |
0 |
0 |
45 |
51 |
103 |
3231 |
3529 |
|
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