rh2q: Convert relative humidity to absolute humidity

In eva3dm: Evaluation of 3D Meteorological and Air Quality Models

Convert relative humidity to absolute humidity

Description

function to convert humidity to absolute humidity using Tetens formula, assuming standard atmosphere conditions.

Usage

rh2q(rh, temp = 15)

Arguments

rh	vector (or data.frame) of relative humidity (in percentage)
temp	vector (or data.frame) of temperature (in Celsius)

Value

value of data.frame with time and the absolute humidity, units are g/g

Note

default values are from standard atmosphere (288.15 K / 15 C)

if rh and temp arguments are data.frame, both need to have the same number of lines and columns, first column (time column) will be ignored.

Examples

# for a singfle value
rh2q(rh = 99, temp = 25)

# vector of rh values
rh2q(rh = c(0,seq(1,100, by = 4)), temp = 25)

# vector of values for rh and temp
rh2q(rh = c(0,seq(1,100, by = 4)), temp = 10:35)

# rh is data.frame and temp is a value
times <- seq(as.POSIXct('2024-01-01',tz = 'UTC'),
             as.POSIXct('2024-01-02',tz = 'UTC'),
             by = 'hour')
rh2q(rh   = data.frame(time = times, a = seq(1,100, by = 4)),temp = 25)

# using both rh and temp are data.frames
rh2q(rh   = data.frame(time = times, a = seq(1,100, by = 4)),
     temp = data.frame(time = times, a = 11:35))

eva3dm documentation built on April 4, 2025, 5:11 a.m.