SNOOLD single profile

General structure

The snow/soil layers file has the structure described below:

• a header section containing the metadata for the location;
• a data section containing description of the layers (if any). Please note that the layers are given from the bottom to the top.
• a hazard data section.

The following points are important to remember:

• the ProfileDate will be used as starting date for the simulation. Therefore, make sure you have meteorological data from this point on!
• the number of soil and snow layers must be right!

Fields definition

initial snow profile fields description

Field Description YYYY Year MM Month DD Day HH Hour MI Minutes Layer_Thick layer thickness [m] T layer temperature [K] Vol_Frac_I fractional ice volume [0-1] Vol_Frac_W fractional water volume [0-1] Vol_Frac_WP fractional preferential flow water volume [0-1] Vol_Frac_V fractional voids volume [0-1] Vol_Frac_S fractional soil volume [0-1]

Field Description Rho_S soil density [kg/m3] Conduc_S mineral phase soil thermal conductivity [w/(mK)] HeatCapac_S mineral phase soil thermal capacity [J/(kg*K)] rg grain radius [mm] rb bond radius [mm] dd dendricity [0-1] sp spericity [0-1] mk marker, see Metamorphism.cc mass_hoar mass of surface hoar [] ne number of elements CDot stress change rate (initialize with 0.) metamo currently unused

Example

Usually, simulations are started at a point in time when no snow is on the ground, therefore not requiring the definition of snow layers. An example is given below with two soil layers:

[SNOWPACK_INITIALIZATION]
StationName=Davos:Baerentaelli
ProfileDate=1999 10 01 00 00
HS_Last=0.0
Latitude=46.701
Longitude=9.82
Altitude=2560
SlopeAngle=0
SlopeAzi=0
nSoilLayerData=2
nSnowLayerData=0
SoilAlbedo=0.5
BareSoil_z0=0.02
CanopyHeight=0.
CanopyLeafAreaIndex=0.
CanopyDirectThroughfall=0
WindScalingFactor=1.00
ErosionLevel=0
TimeCountDeltaHS=0.00
YYYY MM DD HH MI Layer_Thick  T  Vol_Frac_I  Vol_Frac_W  Vol_Frac_V  Vol_Frac_S Rho_S Conduc_S HeatCapac_S  rg  rb  dd  sp  mk mass_hoar ne CDot metamo
1980 10 01 00 00 10 278.15 0.00 0.02 0.01 0.97 2400.0 0.3 900.0 10000 0.0 0.0 0.0 0 0.0 50 0.0 0.0
1980 10 01 00 00 0.5 278.15 0.00 0.02 0.01 0.97 2400.0 0.3 900.0 10000 0.0 0.0 0.0 0 0.0 20 0.0 0.0
SurfaceHoarIndex
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
DriftIndex
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
ThreeHourNewSnow
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
TwentyFourHourNewSnow
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
End