Total Radiation Balance — rad

Calculates the total radiation balance by summing the shortwave and longwave radiation balances.

Usage

rad_bal(...)

# Default S3 method
rad_bal(
  datetime,
  lon,
  lat,
  elev,
  temp,
  rh,
  slope,
  exposition,
  valley,
  surface_type,
  surface_temp,
  ...
)

# S3 method for class 'weather_station'
rad_bal(weather_station, ...)

Arguments

...: Named station fields, site parameters or model assumptions.
datetime: POSIXlt or POSIXct date-time vector.
lon: Longitude in degrees.
lat: Latitude in degrees.
elev: Elevation above sea level in m.
temp: Air temperature in degrees C.
rh: Relative humidity in percent.
slope: Slope in degrees.
exposition: Exposition or aspect in degrees.
valley: Logical value indicating whether the station is in a valley.
surface_type: Surface-type label.
surface_temp: Surface temperature in degrees C.
weather_station: A weather_station object.

Value

Total radiation balance in W/m².

Details

The total radiation balance ($R_{total}$) is calculated as: $$R_{total} = R_{sw} + R_{lw}$$ where: $R_{sw}$ is the shortwave radiation balance, $R_{lw}$ is the longwave radiation balance.

References

Bendix 2004, p. 45 eq. 3.1.

Examples

# Calculate total radiation balance
example_time <- as.POSIXlt(
 "2023-08-06 12:00:00",
 tz = "UTC"
)

rad_bal(
 datetime = example_time,
 lon = 10,
 lat = 50,
 elev = 100,
 temp = 15,
 rh = 60,
 slope = 5,
 exposition = 180,
 valley = FALSE,
 surface_type = "lawn",
 surface_temp = 15
)
#> [1] 477.4196