"data_obs"              Meteorological input variables for the heat
                        stress indices.
"data_wbgt.Bernard"     Example for Wet Bulb Globe Temperature in the
                        shade (Bernard et al. 1999).
"data_wbgt.Liljegren"   Example for Wet Bulb Globe Temperature in the
                        sun (Liljegren et al. 2008).
"data_wbt.Stull"        Example for Wet Bulb Temperature (Stull 2011).
HeatStressR             HeatStressR
apparentTemp            Calculation of the apparent temperature.
calZenith               Calculate zenith angle in degrees.
degToRad                Convert degree angle to radians.
dewp2hurs               Calculation of relative humidity from
                        temperature and dewpoint temperature.
diffusivity             Compute the diffusivity of water vapor in air.
discomInd               Calculation of the discomfort index.
effectiveTemp           Calculation of the effective temperature.
emis_atm                Calculate the atmospheric emissivity.
esat                    Calculate the saturation vapor pressure (hPa)
                        over water.
fTg                     Calculation of the globe temperature.
fTnwb                   Calculation of the natural wet bulb
                        temperature.
h_cylinder_in_air       Calculate the convective heat transfer
                        coefficient for a long cylinder in cross flow.
h_evap                  Calculate the heat of evaporation, J/(kg K).
h_sphere_in_air         Calculate the convective heat transfer
                        coefficient for flow around a sphere.
heat_indices            Calculate multiple heat indices from shared
                        observations.
hi                      Calculation of the heat index.
humidex                 Calculation of humidex.
indexShow               List all available heat indices
is.leapyear             Check whether a year is a leap year.
radToDeg                Convert radian angle to degrees.
swbgt                   Calculation of the simplified wet bulb globe
                        temperature.
tashurs2vap.pres        Calculation of vapour pressure.
thermal_cond            Calculate the thermal conductivity of air, W/(m
                        K).
viscosity               Compute the viscosity of air, kg/(m s).
wbgt.Bernard            Calculation of wet bulb globe temperature,
                        following Bernard's method.
wbgt.Liljegren          Calculation of wet bulb globe temperature,
                        following Liljegren's method.
wbt.Stull               Calculation of wet bulb temperature, following
                        Stull's method.
