| SIC: Sea ice concentration |
(range: 0-1) |
| Ice category Ocean: |
SIC ≤ 0.025 | [0/10] |
| Ice category Open water (OW): |
0.025 ≤ SIC < 0.125 | [1/10] |
| Ice category Very open drift ice (VODI): |
0.125 ≤ SIC < 0.35 | [2/10, 3/10] |
| Ice category Open drift ice (ODI): |
0.35 ≤ SIC < 0.625 | [4/10, 5/10, 6/10] |
| Ice category Close drift ice (CDI): |
0.625 ≤ SIC < 0.85 | [6/10, 7/10, 8/10] |
| Ice category Very close drift ice, Fast ice (VCDI): |
0.85 ≤ SIC | [9/10, 10/10] |
| MIZ: Marginal ice zone |
(categories OW + VODI + ODI + CDI) |
| Ice edge: Boundary between categories ODI and VODI |
| Sea ice extent: Area covered with sea ice of categories ODI + CDI + VCDI |
| MIZ extent: Area covered with sea ice of categories OW + VODI + ODI + CDI |