Climate data

Climate inputs are linked to particular zones by the climate station ID affiliated with that zone. A single climate station (or base station) will typically serve multiple zones within the landscape. Each base station is described by a base station file.

Example Base Station File:

101 base_station_id
100.0 x_coordinate
100.0 y_coordinate
22.9 z_coordinate
2.0 effective_lai
22.9 screen_height
clim\rbw_prime_annual annual_climate_prefix
0 number_non_critical_annual_sequences
clim\rbw_prime_monthly monthly_climate_prefix
0 number_non_critical_monthly_sequences
clim\rbw daily_climate_prefix
2
ndep_NO3
ndep_NH4
0
clim\rbw_prime_hourly hourly_climate_prefix
0 number_non_critical_hourly_sequences

Climate Input Sequence Name / File Extension	Description	Units
rain	precipitation (rain + snow)* required	meters
tmin	minimum daily temperature* required	°C
tmax	maximum daily temperature* required	°C
dayl	day length	seconds
daytime_rain_duration	duration of rainfall	hours
LAI_scalar	zone and seasonal scaling of LAI - only applied to stratum of non-zero height	Unitless
Ldown	incoming longwave radiation	KJ / (meters2)/day
Kdown_direct	incoming direct shortwave radiation	KJ / (meters2)/day
Kdown_diffuse	incoming diffuse shortwave radiation	KJ / (meters2)/day
ndep_NO3	nitrogen deposition as NO3	kg / (meters2)/day
ndep_NH4	nitrogen deposition as NH4	kg / (meters2) /day
PAR_direct	incoming direct PAR radiation	KJ / (meters2)/day
PAR_diffuse	incoming diffuse PAR radiation	KJ / (meters2)/day
relative_humidity	Relative Humidity	Range (0-1)
tday	Mean Daytime Temperature	°C
tnightmax	Night time temperature at sundown (used for soil heat flux)	°C
tsoil	Soil temperature	°C
vpd	Vapour pressure deficit	Pa
wind	Wind speed	meters/ sec.
CO2	Carbon Dioxide	parts per million/year

All possible base station filenames must be listed in the worldfile header, as described in the discussion of GRASS2WORLD below.