Validation of sea ice concentration
Bulletin date: 2021-06-24
Model vs. observations, sea ice class contingency tables
Date: 2021-06-18:
| 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 |
15864 |
5933 |
2103 |
1455 |
642 |
251 |
253 |
11 |
| OW |
0 |
3 |
55 |
208 |
210 |
225 |
135 |
0 |
| VODI |
0 |
0 |
38 |
145 |
174 |
348 |
342 |
2 |
| ODI |
0 |
0 |
8 |
52 |
110 |
299 |
584 |
1 |
| CDI |
0 |
0 |
0 |
84 |
145 |
442 |
1388 |
0 |
| VCDI |
0 |
0 |
0 |
13 |
27 |
182 |
3098 |
3329 |
|
...date precedes bulletin
|
Date: 2021-06-22:
| 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 |
15617 |
6366 |
2495 |
1698 |
610 |
265 |
191 |
11 |
| OW |
0 |
0 |
72 |
113 |
206 |
139 |
84 |
0 |
| VODI |
0 |
0 |
18 |
112 |
260 |
274 |
260 |
2 |
| ODI |
0 |
0 |
2 |
63 |
131 |
348 |
711 |
1 |
| CDI |
0 |
0 |
0 |
81 |
209 |
489 |
1874 |
58 |
| VCDI |
0 |
0 |
0 |
0 |
86 |
134 |
2037 |
3142 |
|
...date precedes bulletin
|
Date: 2021-06-24:
| 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 |
15637 |
6525 |
2471 |
1846 |
652 |
64 |
190 |
11 |
| OW |
0 |
0 |
45 |
178 |
233 |
114 |
131 |
0 |
| VODI |
0 |
0 |
22 |
133 |
255 |
259 |
312 |
2 |
| ODI |
0 |
0 |
5 |
79 |
222 |
274 |
556 |
1 |
| CDI |
0 |
0 |
0 |
101 |
271 |
390 |
2052 |
202 |
| VCDI |
0 |
0 |
0 |
1 |
25 |
49 |
1733 |
3118 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15637 |
6525 |
2482 |
1875 |
683 |
78 |
212 |
11 |
| OW |
0 |
0 |
33 |
159 |
210 |
140 |
123 |
0 |
| VODI |
0 |
0 |
24 |
121 |
252 |
240 |
313 |
2 |
| ODI |
0 |
0 |
4 |
82 |
205 |
254 |
502 |
1 |
| CDI |
0 |
0 |
0 |
99 |
286 |
387 |
1956 |
186 |
| VCDI |
0 |
0 |
0 |
2 |
22 |
51 |
1868 |
3134 |
|
Date: 2021-06-28:
| 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 |
15852 |
6594 |
3268 |
1391 |
423 |
37 |
155 |
12 |
| OW |
0 |
0 |
80 |
205 |
233 |
43 |
44 |
0 |
| VODI |
0 |
0 |
36 |
152 |
364 |
271 |
137 |
2 |
| ODI |
0 |
0 |
15 |
123 |
331 |
453 |
337 |
1 |
| CDI |
0 |
0 |
27 |
39 |
133 |
509 |
1708 |
11 |
| VCDI |
0 |
0 |
0 |
3 |
13 |
74 |
2392 |
2691 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15852 |
6594 |
3283 |
1442 |
493 |
64 |
189 |
12 |
| OW |
0 |
0 |
63 |
165 |
265 |
107 |
98 |
0 |
| VODI |
0 |
0 |
17 |
132 |
303 |
262 |
310 |
2 |
| ODI |
0 |
0 |
19 |
77 |
133 |
260 |
362 |
1 |
| CDI |
0 |
0 |
44 |
94 |
248 |
450 |
1639 |
94 |
| VCDI |
0 |
0 |
0 |
3 |
55 |
244 |
2175 |
2608 |
|
Date: 2021-06-30:
| 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 |
16839 |
6695 |
2406 |
1235 |
577 |
49 |
166 |
12 |
| OW |
0 |
0 |
94 |
222 |
219 |
66 |
55 |
0 |
| VODI |
0 |
0 |
33 |
130 |
370 |
370 |
159 |
2 |
| ODI |
0 |
0 |
7 |
97 |
313 |
316 |
418 |
1 |
| CDI |
0 |
0 |
18 |
57 |
145 |
355 |
1876 |
35 |
| VCDI |
0 |
0 |
0 |
3 |
28 |
116 |
1994 |
2681 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
16839 |
6694 |
2408 |
1259 |
634 |
93 |
193 |
12 |
| OW |
0 |
1 |
81 |
181 |
214 |
119 |
118 |
0 |
| VODI |
0 |
0 |
22 |
135 |
270 |
264 |
346 |
2 |
| ODI |
0 |
0 |
15 |
39 |
162 |
223 |
401 |
1 |
| CDI |
0 |
0 |
32 |
127 |
308 |
377 |
1757 |
105 |
| VCDI |
0 |
0 |
0 |
3 |
64 |
196 |
1853 |
2611 |
|
Date: 2021-07-02:
| 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 |
16782 |
6845 |
2486 |
1289 |
507 |
55 |
167 |
11 |
| OW |
0 |
3 |
94 |
240 |
267 |
96 |
77 |
0 |
| VODI |
0 |
0 |
39 |
193 |
334 |
303 |
219 |
2 |
| ODI |
0 |
0 |
8 |
100 |
274 |
319 |
429 |
1 |
| CDI |
0 |
0 |
3 |
83 |
172 |
404 |
2145 |
60 |
| VCDI |
0 |
0 |
0 |
1 |
2 |
128 |
1450 |
2571 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
16782 |
6847 |
2485 |
1308 |
582 |
103 |
203 |
10 |
| OW |
0 |
1 |
85 |
178 |
205 |
104 |
155 |
1 |
| VODI |
0 |
0 |
33 |
187 |
223 |
241 |
350 |
7 |
| ODI |
0 |
0 |
23 |
81 |
176 |
202 |
332 |
17 |
| CDI |
0 |
0 |
4 |
151 |
363 |
517 |
2253 |
195 |
| VCDI |
0 |
0 |
0 |
1 |
7 |
138 |
1194 |
2415 |
|
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