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.

Format for Time Series Input Files The first line of each input time series file must give the start date of the time series. The start date of the input must precede the start date listed in the worldfile. Following the start date, time series values are listed sequentially. For example: example_simulation_daily.rain will contain the following

1986 1 1 1


0.0028

0.000

0.0157

0.000

…