Physical Basis for Microwave Remote Sensing ...
Ice type
New ice, including frazil, grease, slush,
shuga, and pancake ice
Nilas
Young ice
Gray ice
Gray-white ice
First-year ice
Thin first-year or white ice
Medium first-year ice
Thick first-year ice
Old ice - second-year or multiyear ice
Second-year ice
Multiyear ice
Thickness (cm)
<10
<10
10-30
10-15
15-30
30-200
30-70
70-120
>120
Table 18.4: International ice code.
Term
Compact pack ice
Consolidated pack ice
Very close pack ice
Close pack ice
Open pack ice
Very open pack ice
Concentration
10/10
10/10
9/10 to less than 10/10
7/10 to 8/10
4/10 to 6/10
1/10 to 3/10
Comments
No water visible
Floes frozen together
Floes mostly in contact
Floes generally not in contact
Table 18.5: Concentration classes of sea ice.
495