Snowfall (Solid Precipitation) - Capabilities and Requirements (from IGOS Cryosphere Theme Report)
|
Parameter
|
CT O |
Measurement Range |
Measurement Accuracy |
Resolution |
Comment / Principal Driver |
||||||
|
Spatial |
Temporal |
||||||||||
|
L |
H |
U |
V |
U |
V |
U |
V |
U |
|||
|
Snowfall amount |
C |
0 |
100 |
mm |
1 |
mm |
1 |
km |
1 |
day |
MODIS/SSMI |
|
T |
0 |
100 |
mm |
1 |
mm |
0.5 |
km |
1 |
day |
Hydromet |
|
|
O |
0 |
100 |
mm |
1 |
mm |
0.1 |
km |
12 |
hr |
||
|
Precip/Snowfall rate |
C |
0 |
100 |
mm/hr |
2-10 |
cm |
25 |
km |
1 |
day |
AMSR-E/TRMM |
|
T |
0 |
100 |
mm/hr |
3 |
cm |
0.5 |
km |
1 |
day |
Hydromet Transportation |
|
|
O |
0 |
100 |
mm/hr |
2 |
cm |
0.1 |
km |
12 |
hr |
||
|
Precipitation type |
C |
N.A. |
--- |
--- |
--- |
--- |
--- |
--- |
--- |
--- |
Need HF SAR |
|
T |
0.3 |
3 |
|
10 |
% |
0.5 |
km |
1 |
day |
Hydromet |
|
|
O |
0.3 |
3 |
|
7 |
% |
0.1 |
km |
12 |
hr |
||
|
Snow particle size |
C |
0 |
~0.7 |
|
6-35 |
|
25 |
km |
1 |
day |
e.g. AMSR-E |
|
T |
0 |
1 |
|
10 |
|
0.5 |
km |
1 |
day |
Hydromet |
|
|
O |
0 |
1 |
|
6 |
|
0.1 |
km |
1 |
hr |
|
|
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.