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4.3.17. Evergreen Tree Initial State

Initial state for evergreen trees with vegetation parameters.

Parameters:

state

Initial water state of the surface

Unit:

mm

Example:

0.0

soilstore

Initial soil store. Related to Soil Moisture Deficit (SMD) as SMD = soilstorecap - soilstore.

Unit:

mm

Example:

150.0

snowfrac

Snow fraction

Unit:

dimensionless

Example:

0.0

snowpack

Snow pack

Unit:

mm

Example:

0.0

icefrac

Ice fraction

Unit:

dimensionless

Example:

0.0

snowwater

Snow water

Unit:

mm

Example:

0.0

snowdens

Snow density

Unit:

kg m^-3

Example:

0.0

temperature

Initial temperature for each thermal layer

Unit:

degC

Example:

[15.0, 15.0, 15.0, 15.0, 15.0]

tsfc

Initial exterior surface temperature

Unit:

degC

Example:

15.0

tin

Initial interior surface temperature

Unit:

degC

Example:

20.0

ref

The ref parameter group is defined by the Reference Info structure.

alb_id

Albedo at the start of the model run. If not provided, it is computed from the LAI state and vegetation-specific albedo limits (alb_min, alb_max). Trees follow a direct LAI-albedo relationship (denser canopy -> higher albedo due to leaves being more reflective than bark), while grass follows a reversed relationship (denser grass -> lower albedo as soil is more reflective than grass blades).

Unit:

dimensionless

Default:

None (optional)

lai_id

Leaf area index at the start of the model run.

Unit:

m² m^-2

Example:

1.0

gdd_id

Growing degree days at the start of the model run

Unit:

degC d

Example:

0

sdd_id

Senescence degree days at the start of the model run

Unit:

degC d

Example:

0

wu

The wu parameter group is defined by the wateruse structure.