wbgt.Liljegren: Calculation of wet bulb globe temperature, following...

In anacv/HeatStress: Calculate heat stress indices

Calculation of wet bulb globe temperature, following Liljegren's method.

Description

Calculation of wet bulb globe temperature from air temperature, dew point temperature, radiation and wind.

Usage

wbgt.Liljegren(tas, dewp, wind, radiation, dates, lon, lat,
  tolerance = 1e-04, noNAs = TRUE, swap = FALSE, hour = FALSE)

Arguments

tas	vector of temperature in degC.
dewp	vector of dewpoint temperature in degC.
wind	vector of wind speed in m/s.
radiation	vector of solar shortwave downwelling radiation in W/m2.
dates	vector of dates in the format yyyy-mm-dd (or 'yyyy-mm-dd HH:MM:SS'). If format yyyy-mm-dd is provided, the default hour is 12:00:00.
lon	value for the longitude of the location.
lat	value for the latitude of the location.
tolerance	(optional) tolerance value for the iteration. Default: 1e-4.
noNAs	logical, should NAs be introduced when dewp>tas? If TRUE specify how to deal in those cases (swap argument)
swap	logical, should tas >= dewp be enforced by swapping? Otherwise, dewp is set to tas. This argument is needed when noNAs=T.
hour	logical. If TRUE, allow working with hourly data for zenith angle calculation. Default: FALSE (12 UTC is used).

Details

This corresponds to the implementation for outdoors or in the sun conditions (Liljegren et al. 2008). Original fortran code by James C. Liljegren, translated by Bruno Lemke into Visual Basic (VBA) and Ana Casanueva into R.

Value

A list of:

$data: wet bulb globe temperature in degC

$Tnwb: natural wet bulb temperature (Tnwb) in degC

$Tg: globe temperature in degC

Author(s)

A.Casanueva (21.02.2017).

Examples

## Not run:  
# load the meteorological variables for example data in Salamanca:
data("data_obs") 
wbgt.outdoors <- wbgt.Liljegren(tas=data_obs$tasmean, dewp=data_obs$dewp, 
wind=data_obs$wind, radiation=data_obs$solar, dates= data_obs$Dates, lon=-5.66, lat=40.96)

## End(Not run)

anacv/HeatStress documentation built on Aug. 9, 2022, 2:36 p.m.