Validation of sea ice concentration - American sector
Bulletin date: 2023-12-21
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2023-12-15:
| 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 |
387 |
1997 |
205 |
352 |
370 |
4 |
0 |
0 |
| OW |
56 |
527 |
167 |
221 |
403 |
89 |
0 |
0 |
| VODI |
17 |
249 |
83 |
334 |
380 |
227 |
0 |
0 |
| ODI |
0 |
15 |
18 |
95 |
414 |
351 |
3 |
0 |
| CDI |
0 |
1 |
2 |
14 |
297 |
1155 |
65 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
377 |
2687 |
8232 |
26071 |
|
...date precedes bulletin
|
Date: 2023-12-17:
| 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 |
290 |
1658 |
79 |
168 |
299 |
238 |
2 |
0 |
| OW |
0 |
479 |
82 |
130 |
147 |
216 |
14 |
0 |
| VODI |
0 |
270 |
139 |
289 |
249 |
461 |
23 |
0 |
| ODI |
0 |
75 |
56 |
150 |
343 |
530 |
17 |
0 |
| CDI |
0 |
4 |
9 |
60 |
141 |
1175 |
488 |
0 |
| VCDI |
0 |
0 |
0 |
23 |
188 |
2198 |
8001 |
27175 |
|
...date precedes bulletin
|
Date: 2023-12-19:
| 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 |
168 |
1235 |
72 |
133 |
162 |
176 |
0 |
0 |
| OW |
0 |
312 |
73 |
154 |
137 |
158 |
6 |
0 |
| VODI |
0 |
67 |
55 |
222 |
239 |
175 |
5 |
0 |
| ODI |
0 |
5 |
14 |
135 |
397 |
390 |
7 |
0 |
| CDI |
0 |
1 |
3 |
29 |
165 |
1152 |
488 |
15 |
| VCDI |
0 |
0 |
0 |
0 |
58 |
2299 |
10055 |
27104 |
|
...date precedes bulletin
|
Date: 2023-12-21:
| 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 |
0 |
907 |
39 |
89 |
78 |
189 |
0 |
0 |
| OW |
0 |
439 |
45 |
101 |
105 |
221 |
0 |
0 |
| VODI |
0 |
128 |
26 |
142 |
198 |
240 |
0 |
0 |
| ODI |
0 |
7 |
16 |
128 |
348 |
279 |
29 |
0 |
| CDI |
0 |
1 |
4 |
38 |
253 |
734 |
264 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
76 |
2688 |
10632 |
27422 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
915 |
43 |
91 |
102 |
244 |
0 |
0 |
| OW |
0 |
350 |
43 |
88 |
77 |
150 |
0 |
0 |
| VODI |
0 |
208 |
23 |
148 |
190 |
210 |
0 |
0 |
| ODI |
0 |
8 |
16 |
113 |
333 |
287 |
16 |
0 |
| CDI |
0 |
1 |
5 |
54 |
268 |
731 |
218 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
88 |
2729 |
10691 |
27422 |
|
Date: 2023-12-23:
| 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 |
51 |
521 |
40 |
68 |
144 |
26 |
0 |
0 |
| OW |
33 |
364 |
54 |
101 |
165 |
92 |
1 |
0 |
| VODI |
0 |
303 |
52 |
161 |
279 |
90 |
50 |
0 |
| ODI |
0 |
39 |
9 |
144 |
414 |
120 |
40 |
0 |
| CDI |
0 |
7 |
14 |
91 |
499 |
342 |
128 |
0 |
| VCDI |
0 |
0 |
0 |
30 |
183 |
2287 |
10905 |
28019 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
49 |
541 |
41 |
81 |
166 |
79 |
0 |
0 |
| OW |
35 |
321 |
61 |
85 |
127 |
39 |
4 |
0 |
| VODI |
0 |
272 |
42 |
169 |
265 |
77 |
47 |
0 |
| ODI |
0 |
76 |
11 |
125 |
425 |
119 |
46 |
0 |
| CDI |
0 |
24 |
13 |
95 |
474 |
334 |
110 |
0 |
| VCDI |
0 |
0 |
1 |
40 |
227 |
2309 |
10917 |
28019 |
|
Date: 2023-12-25:
| 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 |
34 |
416 |
39 |
37 |
13 |
8 |
2 |
0 |
| OW |
7 |
520 |
65 |
70 |
27 |
47 |
14 |
0 |
| VODI |
0 |
177 |
82 |
316 |
200 |
71 |
27 |
0 |
| ODI |
0 |
6 |
13 |
98 |
526 |
183 |
47 |
0 |
| CDI |
0 |
5 |
7 |
28 |
367 |
589 |
226 |
1 |
| VCDI |
0 |
6 |
4 |
43 |
169 |
2274 |
15017 |
24085 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
36 |
460 |
66 |
113 |
82 |
109 |
14 |
0 |
| OW |
5 |
212 |
48 |
104 |
43 |
74 |
53 |
0 |
| VODI |
0 |
272 |
43 |
161 |
175 |
144 |
136 |
0 |
| ODI |
0 |
103 |
27 |
91 |
354 |
141 |
119 |
0 |
| CDI |
0 |
66 |
11 |
60 |
386 |
414 |
285 |
7 |
| VCDI |
0 |
17 |
15 |
63 |
262 |
2290 |
14726 |
24079 |
|
Date: 2023-12-27:
| 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 |
0 |
308 |
10 |
10 |
11 |
0 |
0 |
0 |
| OW |
0 |
292 |
59 |
53 |
46 |
58 |
7 |
0 |
| VODI |
0 |
297 |
83 |
255 |
239 |
99 |
26 |
0 |
| ODI |
0 |
15 |
9 |
100 |
263 |
194 |
96 |
0 |
| CDI |
0 |
7 |
3 |
25 |
232 |
570 |
290 |
0 |
| VCDI |
0 |
14 |
10 |
23 |
278 |
3004 |
11433 |
27447 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
382 |
25 |
47 |
77 |
84 |
5 |
0 |
| OW |
0 |
81 |
47 |
79 |
83 |
125 |
52 |
0 |
| VODI |
0 |
234 |
41 |
144 |
122 |
192 |
123 |
0 |
| ODI |
0 |
104 |
26 |
50 |
140 |
160 |
165 |
0 |
| CDI |
0 |
95 |
24 |
106 |
278 |
270 |
682 |
1 |
| VCDI |
0 |
37 |
11 |
40 |
369 |
3094 |
10825 |
27446 |
|
Date: 2023-12-29:
| 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 |
264 |
2 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
341 |
38 |
37 |
30 |
26 |
0 |
0 |
| VODI |
0 |
177 |
63 |
156 |
175 |
169 |
14 |
0 |
| ODI |
0 |
118 |
41 |
125 |
240 |
187 |
67 |
0 |
| CDI |
0 |
12 |
13 |
31 |
224 |
444 |
228 |
0 |
| VCDI |
0 |
7 |
7 |
32 |
231 |
2890 |
13747 |
25730 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
176 |
4 |
7 |
1 |
15 |
0 |
0 |
| OW |
0 |
270 |
31 |
77 |
110 |
167 |
36 |
0 |
| VODI |
0 |
139 |
34 |
47 |
115 |
208 |
87 |
0 |
| ODI |
0 |
160 |
42 |
106 |
74 |
218 |
116 |
0 |
| CDI |
0 |
113 |
38 |
100 |
201 |
270 |
244 |
2 |
| VCDI |
0 |
61 |
15 |
44 |
399 |
2838 |
13573 |
25728 |
|
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