Validation of sea ice concentration
Bulletin date: 2021-07-15
Model vs. observations, sea ice class contingency tables
Date: 2021-07-09:
| 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 |
16706 |
6459 |
3834 |
1626 |
245 |
60 |
147 |
19 |
| OW |
0 |
0 |
71 |
201 |
227 |
73 |
87 |
0 |
| VODI |
0 |
0 |
18 |
189 |
260 |
224 |
200 |
2 |
| ODI |
0 |
0 |
0 |
81 |
135 |
239 |
286 |
1 |
| CDI |
0 |
0 |
0 |
58 |
134 |
452 |
1984 |
219 |
| VCDI |
0 |
0 |
0 |
4 |
25 |
152 |
1366 |
2375 |
|
...date precedes bulletin
|
Date: 2021-07-13:
| 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 |
17263 |
7007 |
3213 |
1427 |
430 |
85 |
139 |
0 |
| OW |
0 |
0 |
36 |
142 |
188 |
88 |
56 |
0 |
| VODI |
0 |
0 |
17 |
163 |
237 |
217 |
132 |
0 |
| ODI |
0 |
0 |
2 |
55 |
159 |
290 |
316 |
0 |
| CDI |
0 |
0 |
0 |
28 |
87 |
372 |
2232 |
1051 |
| VCDI |
0 |
0 |
0 |
1 |
7 |
13 |
602 |
2104 |
|
...date precedes bulletin
|
Date: 2021-07-15:
| 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 |
17473 |
7156 |
3070 |
1246 |
550 |
114 |
129 |
0 |
| OW |
0 |
0 |
45 |
100 |
216 |
136 |
57 |
0 |
| VODI |
0 |
0 |
19 |
61 |
249 |
250 |
176 |
0 |
| ODI |
0 |
0 |
2 |
30 |
127 |
270 |
357 |
8 |
| CDI |
0 |
0 |
0 |
12 |
141 |
368 |
2361 |
1471 |
| VCDI |
0 |
0 |
0 |
1 |
3 |
0 |
396 |
1565 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
17473 |
7156 |
3081 |
1256 |
592 |
133 |
139 |
0 |
| OW |
0 |
0 |
37 |
91 |
172 |
120 |
54 |
0 |
| VODI |
0 |
0 |
16 |
59 |
247 |
236 |
159 |
0 |
| ODI |
0 |
0 |
2 |
30 |
127 |
252 |
357 |
12 |
| CDI |
0 |
0 |
0 |
13 |
144 |
397 |
2359 |
1491 |
| VCDI |
0 |
0 |
0 |
1 |
4 |
0 |
408 |
1541 |
|
Date: 2021-07-19:
| 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 |
17713 |
7264 |
3312 |
1211 |
420 |
86 |
78 |
0 |
| OW |
0 |
0 |
39 |
147 |
174 |
91 |
26 |
0 |
| VODI |
0 |
0 |
12 |
102 |
229 |
294 |
86 |
0 |
| ODI |
0 |
0 |
4 |
51 |
118 |
306 |
530 |
10 |
| CDI |
0 |
0 |
0 |
5 |
11 |
294 |
2039 |
2142 |
| VCDI |
0 |
0 |
0 |
1 |
2 |
2 |
352 |
1008 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
17713 |
7264 |
3291 |
1191 |
444 |
98 |
88 |
0 |
| OW |
0 |
0 |
51 |
139 |
144 |
136 |
44 |
0 |
| VODI |
0 |
0 |
23 |
119 |
198 |
256 |
138 |
0 |
| ODI |
0 |
0 |
2 |
53 |
117 |
248 |
369 |
0 |
| CDI |
0 |
0 |
0 |
14 |
50 |
333 |
2257 |
2168 |
| VCDI |
0 |
0 |
0 |
1 |
1 |
2 |
215 |
992 |
|
Date: 2021-07-21:
| 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 |
18318 |
7147 |
3195 |
1103 |
283 |
83 |
91 |
0 |
| OW |
0 |
0 |
67 |
146 |
167 |
86 |
37 |
0 |
| VODI |
0 |
0 |
17 |
96 |
299 |
219 |
120 |
0 |
| ODI |
0 |
0 |
3 |
38 |
125 |
277 |
589 |
0 |
| CDI |
0 |
0 |
0 |
8 |
48 |
290 |
2249 |
1906 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
1 |
203 |
947 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
18318 |
7147 |
3188 |
1065 |
276 |
92 |
106 |
0 |
| OW |
0 |
0 |
66 |
147 |
198 |
120 |
46 |
0 |
| VODI |
0 |
0 |
18 |
126 |
248 |
177 |
144 |
0 |
| ODI |
0 |
0 |
9 |
35 |
126 |
208 |
375 |
0 |
| CDI |
0 |
0 |
1 |
18 |
74 |
356 |
2386 |
1526 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
3 |
232 |
1327 |
|
Date: 2021-07-23:
| 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 |
18845 |
7570 |
2661 |
830 |
211 |
71 |
72 |
0 |
| OW |
0 |
0 |
105 |
179 |
172 |
75 |
38 |
0 |
| VODI |
0 |
0 |
27 |
167 |
274 |
164 |
131 |
0 |
| ODI |
0 |
0 |
2 |
29 |
114 |
259 |
633 |
0 |
| CDI |
0 |
0 |
0 |
10 |
68 |
327 |
2156 |
2079 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
111 |
779 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
18845 |
7570 |
2685 |
780 |
230 |
81 |
89 |
0 |
| OW |
0 |
0 |
75 |
210 |
201 |
97 |
61 |
0 |
| VODI |
0 |
0 |
26 |
142 |
208 |
145 |
123 |
0 |
| ODI |
0 |
0 |
9 |
69 |
102 |
180 |
434 |
0 |
| CDI |
0 |
0 |
0 |
14 |
98 |
393 |
2200 |
1592 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
234 |
1266 |
|
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