calcFP: Calculate Frost Point

In ConSciR: Tools for Conservation Science

Calculate Frost Point

Description

Function to calculate frost point (°C) from temperature (°C) and relative humidity (%).

Usage

calcFP(Temp, RH)

Arguments

Temp	Temperature (°Celsius)
RH	Relative Humidity (0-100%)

Details

Formula coefficients from Arden Buck equation (1981, 1996) saturation vapor pressure over ice.

• a = 6.1115

• b = 23.036

• c = 279.82

• d = 333.7

Value

Tf, Frost Point (°Celsius)

Note

This function is unstable and is under development.

Examples

# calcFP is unstable and is under development
# Frost point at 20°C (Temp) and 50% relative humidity (RH)
calcFP(20, 50)
calcFP(0, 50)


# mydata file
filepath <- data_file_path("mydata.xlsx")
mydata <- readxl::read_excel(filepath, sheet = "mydata", n_max = 5)

mydata |> dplyr::mutate(FrostPoint = calcFP(Temp, RH))

ConSciR documentation built on Nov. 5, 2025, 5:25 p.m.