Calculates the longwave radiation of the atmosphere.
Usage
rad_lw_in(...)
# Default S3 method
rad_lw_in(temp, rh, slope, valley, ..., sigma = sigma_default)
# S3 method for class 'weather_station'
rad_lw_in(weather_station, ...)Arguments
- ...
Named station fields, site parameters or model assumptions.
- temp
Air temperature in degrees C.
- rh
Relative humidity in percent.
- slope
Slope in degrees.
- valley
Logical value indicating whether the station is in a valley.
- sigma
Stefan-Boltzmann constant in W m-2 K-4.
- weather_station
A weather_station object.
Details
The longwave incoming radiation (\(LW_{in}\)) is calculated as: $$LW_{in} = \epsilon_{air} \cdot \sigma \cdot T_{air}^4 \cdot \text{sky\_view}$$ where: \(\epsilon_{air}\) is the emissivity of the air, \(\sigma\) is the Stefan-Boltzmann constant, \(T_{air}\) is the air temperature in Kelvin, and \(\text{sky\_view}\) is the sky view factor.