Sea Ice - Capabilities and Requirements (from IGOS Cryosphere Theme Report)
|
Parameter
|
C T O |
Measurement Range |
Measurement Accuracy |
Resolution |
Comment / Principal Driver |
||||||
|
Spatial |
Temporal |
||||||||||
|
L |
H |
U |
V |
U |
V |
U |
V |
U |
|||
|
Extent/Edge |
Ccl Cop |
NA |
NA |
km |
15 0.1 |
km |
15 0.1 |
km |
1 3 |
day |
AMSR VIR, SAR, AUV |
|
T |
NA |
NA |
km |
10 |
km |
10 |
km |
1 |
day |
CMIS |
|
|
Ocl Oop |
NA |
NA |
km |
5 0.1 |
km |
1-5 0.1 |
km |
1 1 |
day |
CMIS, SAR, AUV |
|
|
Concentration |
Ccl Cop |
15 0 |
100 |
% |
5-20 |
% |
15 |
km |
1 |
day |
AMSR, VIR, SAR, AUV |
|
T |
0 |
100 |
% |
<10 |
% |
15 |
km |
1 |
day |
|
|
|
O |
0 |
100 |
% |
<5 |
% |
10 |
km |
1 |
day |
CMIS, SAR, AUV |
|
|
Leads/polynyas |
Ccl Cop |
0 0 |
100 indet. |
% km2 |
5-20 0.1 |
% km2 |
15 0.5 |
km |
1 1 |
day week |
AMSR, SAR, AUV |
|
T |
|
|
|
|
|
|
|
|
|
|
|
|
Ocl Oop |
0 0 |
100 indet. |
% km2 |
5 0.1 |
% km2 |
10 0.1 |
km |
1 1 |
day |
MODIS, PM, AUV |
|
|
Stage of Development (Ice Age) |
Ccl Cop |
0 |
100 |
% |
5-20 |
% |
15 |
km |
1 |
day |
SSMI, VIR, Scat, SAR |
|
T |
0 |
100 |
% |
<10 |
% |
15 |
km |
1 |
day |
SAR |
|
|
Ocl Oop |
0 |
100 |
% |
<5 |
% |
10 |
km |
1 |
day |
SAR |
|
|
Motion1 |
Ccl Cop |
0 |
100 |
km day-1 |
5 0.5 |
km day-1 |
25 1 |
km |
1 3 |
day |
AMSR2 SAR2, buoys |
|
T |
0 |
100 |
km day-1 |
3 |
km day-1 |
25 |
km |
1 |
day |
SAR |
|
|
Ocl Oop |
0 |
100 |
km day-1 |
1 0.5 |
km day-1 |
1 0.1 |
km |
1 1 |
day |
More freq. SAR, improved MIZ performance |
|
|
Thickness |
Ccl Cop |
0 |
10 |
m |
0.5 10 |
m % |
0.5 0.5 |
km |
0.5 1 |
year week |
ICESat op ice charts, mass balance buoys, AUV |
|
T |
0 |
10 |
m |
|
|
|
|
|
|
|
|
|
Ocl Oop |
0 |
10 |
m |
0.1 10 |
m % |
25 0.5 |
km |
1 1 |
mnth day |
sat. altimeter, mass balance buoys, AUV |
|
|
Ridge Height, Concentration |
Ccl Cop |
0 |
10 |
m |
- |
m |
|
|
|
|
SAR |
|
T |
0 |
10 |
m |
2 |
m |
|
|
|
|
SAR |
|
|
Ocl Oop |
0 |
10 |
m |
1 |
m |
|
|
|
|
SAR |
|
|
Snow Depth on Ice |
Ccl |
0 |
100 |
cm |
10-20 |
cm |
15 |
km |
1 |
day |
AMSR |
|
T |
0 |
100 |
cm |
5 |
cm |
10 |
km |
1 |
day |
CMIS |
|
|
Ocl |
0 |
100 |
cm |
2 |
cm |
5 |
km |
1 |
day |
CMIS |
|
|
Melt Onset, Duration of Melt |
Ccl |
1 |
365 |
doy |
4 |
day |
15 |
km |
1 |
day |
AMSR, Scat |
|
T |
1 |
365 |
doy |
2 |
day |
15 |
km |
1 |
day |
|
|
|
Ocl |
1 |
365 |
doy |
1 |
day |
10 |
km |
1 |
day |
|
|
|
Surface Characteristics (albedo, meltpond, dust, snow properties, temperature)3 |
Ccl |
0 |
100 |
% |
10 |
% |
1 |
km |
1 |
day |
MODIS, but not currently produced, AUV |
|
T |
0 |
100 |
% |
10 |
% |
1 |
km |
1 |
day |
||
|
Ocl |
0 |
100 |
% |
1-5 |
% |
0.5 |
km |
1 |
day |
||
|
Volume/Mass Flux |
Ccl |
|
|
|
|
|
|
|
|
|
Derived from motion, thickness, concentration |
|
T |
|
|
|
|
|
|
|
|
|
||
|
Ocl |
0 |
indet. |
km3 day-1 |
1 |
km3 day-1 |
25 |
km |
1 |
day |
||
1Velocity measurement, range and errors are for each orthogonal component. 2Antarctic measurements are less robust than for the Arctic primarily due to the influence of weather. 3Range and errors for albedo and meltpond concentration. Other parameters listed not yet regularly observed. There is overlap of these products with products in snow chapter and albedo/temperature chapter.
Codes are as follows: C = Current Capability, T = Threshold Requirement (Minimum necessary), O= Objective Requirement (Target), L = Low end of measurement range, U = Unit, H = High end of measurement range, V = Value, cl = climate, op = operational.