Description of algorithm
Interpretation of results
Full domain
  Ice concntr, edge pos
  Contingency tables
American sector
European sector
Asian sector

Validation of sea ice concentration - Full domain

Reference date: 2025-06-26

Model: GLO MFC - NEMO

Data source: OSI SAF N.H. sea ice concentration

Model vs. observations, sea ice class contingency tables

Date: 2025-06-20:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 80403 21006 802 920 93 1 0 0
OW 0 1232 308 830 357 7 0 0
VODI 0 1218 361 1572 2695 278 24 0
ODI 0 1048 394 1359 3240 2106 401 0
CDI 0 124 98 391 2527 15448 6749 4
VCDI 0 2 5 13 635 5190 27538 7639

Date: 2025-06-22:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 81240 21651 862 841 89 2 0 0
OW 0 1243 340 952 353 10 0 0
VODI 0 1061 327 1338 2600 450 39 0
ODI 0 838 335 1431 2964 2413 317 0
CDI 0 93 89 330 3571 18122 4437 49
VCDI 0 0 0 5 284 4468 24769 9105

Date: 2025-06-24:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 81770 22546 806 958 100 5 0 0
OW 0 1274 315 1035 345 19 0 0
VODI 0 772 303 1325 1888 297 32 0
ODI 0 645 284 1364 4316 2008 356 0
CDI 0 70 64 274 5003 18100 5157 54
VCDI 0 0 0 7 2199 6898 22186 4243

Date: 2025-06-26:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 83458 22539 800 931 115 0 0 0
OW 0 1229 367 1054 243 16 0 0
VODI 0 677 309 1616 1861 410 30 0
ODI 0 579 276 1474 3262 2270 420 0
CDI 0 73 67 331 3459 23031 5464 48
VCDI 0 0 0 9 302 9025 17096 4177

Date: 2025-06-28:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 85715 22148 761 1018 123 3 0 0
OW 0 1259 412 1072 200 18 0 0
VODI 0 807 330 2305 1720 282 40 0
ODI 0 493 287 1133 3068 2502 428 0
CDI 0 39 50 183 4476 24960 5064 0
VCDI 0 0 0 5 222 7017 16667 2211

Date: 2025-06-30:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 87026 21940 850 1138 108 5 0 0
OW 0 1538 506 1504 316 22 0 0
VODI 0 670 303 1575 1676 334 46 0
ODI 0 465 255 1129 3749 3004 325 0
CDI 0 46 28 262 5680 24161 4776 129
VCDI 0 0 0 0 114 6313 15332 1693

Date: 2025-07-02:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 87584 22390 946 973 78 0 1 0
OW 0 1801 514 1472 475 21 0 0
VODI 0 666 266 1344 1935 438 12 0
ODI 0 410 283 1033 4254 3375 202 0
CDI 0 33 50 280 7263 24970 3552 36
VCDI 0 0 0 1 39 4704 14816 801

Date: 2025-07-04:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 88849 22586 943 833 86 3 0 0
OW 0 1864 391 1323 553 26 0 0
VODI 0 614 251 1335 2492 747 26 0
ODI 0 519 242 1114 4487 3690 306 0
CDI 0 16 38 237 9057 23081 4291 0
VCDI 0 0 0 0 79 4525 12413 1


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