Total concentration
Total Concentration
The total concentration (C) is re-
v
(can be a range)
C
ported in tenths and is the uppermost
group. Concentration may be ex-
Partial Concentrations
v
pressed as a single number or as a
Ca Cb
Cc
(from thickest to least thick)
range, not to exceed two tenths (i.e.,
Stage of Development
3-5, 5-7)
v
(from thickest to least thick)
So
Sa Sb Sc
Sd
Partial concentrations
v
Partial concentrations (Ca, Cb, Cc)
Stage of Development
Fa Fb
Fc
(of greater remaining
are also reported in tenths, but must
concentration)
be reported as a single digit. These are
reported in order of decreasing thick-
Floe Size
Stage of Development
ness. That is, Ca is the concentration
(ice thicker than Sa but less than 1/10)
of the thickness ice and Cc is the con-
centration of the thinnest ice.
Stages of development
Stages of development (Sa, Sb, Sc, So, Sd) are listed using the following code in de-
creasing order of thickness. These codes are directly correlated with the partial concen-
trations above. Ca is the concentration of stage Sa, Cb is the concentration of stage Sb, and
Cc is the concentration of Sc. So is used to report a development with the greatest remain-
ing concentration that will not fit into the egg. If all partial concentrations equal the total
concentration and there is an Sd, Sd is considered to be present in a trace amount.
The following codes are used to denote stages of development for sea ice:
Stage of development
Code figure
New Ice-Frazil, Grease, Slush, Shuga (010 cm)
1
Nilas, Ice Rind (010 cm)
2
Young (1030 cm)
3
Gray (1015 cm)
4
Gray-White (1530 cm)
5
First Year (30120 cm)
6
First Year Thin (3070 cm)
7
First Year Thin- First Stage (3070 cm)
8
First Year Thin- Second Stage (3070 cm)
9
Med First Year (70120 cm)
1.
Thick First Year (>120 cm)
4.
Old-Survived at least one seasons melt (>2 m)
7.
Second Year (>2 m)
8.
Multi-Year (>2 m)
9.
v
Ice of Land Origin
88
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