tdps2hurs: Relative humidity from Dew-point temperature

In SantanderMetGroup/convertR: A climate4R Package for Unit Conversion and Variable Derivation

Relative humidity from Dew-point temperature

Description

Estimate the Relative humidity from Dew-point temperature and air temperaure

Usage

tdps2hurs(tdps, tas, negatives.to.zero = TRUE)

Arguments

tdps	Dew-point temperature
tas	Near-surface air temperature
negatives.to.zero	Logical flag indicating if estimated negative values should be truncated to zero %. Default to TRUE.

Value

A climate4R CDM grid of estimated relative humidity (in %)

Input units

In principle, the derivation functions will work regardless of the input units, as all units are internally converted as necessary according to the specific formulae definitions. However, the units string (see getGridUnits) must be parseable. In the same vein, the input units need to be convertible to the required ones. Unit consistency is internally achieved by the function udConvertGrid.

Note

The formula is a valid aproximation for moist air (RH>50%), but can yield very inaccurate results otherwise, so use it with caution.

Author(s)

J. Bedia

References

The adjustment formulae of pressure values to other levels are those routinely used by the WMO. These are described in the following technical report: https://www.wmo.int/pages/prog/www/IMOP/meetings/SI/ET-Stand-1/Doc-10_Pressure-red.pdf

Lawrence, Mark G., 2005: The relationship between relative humidity and the dewpoint temperature in moist air: A simple conversion and applications. Bull. Amer. Meteor. Soc., 86, 225-233. https://dx.doi.org/10.1175/BAMS-86-2-225

See Also

hurs2tdps, performing the inverse calculation to derive dew-point temperature from relative humidity and observed temperature

Other derivation: hurs2huss(), hurs2tdps(), hurs2w(), huss2hurs(), huss2pvp(), ps2psl(), psl2ps(), rad2cc(), tas2ws()

Other humidity: hurs2huss(), hurs2tdps(), hurs2w(), huss2hurs(), huss2pvp(), tas2ws()

SantanderMetGroup/convertR documentation built on June 30, 2023, 3:03 a.m.