humidity {IDPmisc} | R Documentation |
Converting Humidity Measures into Each Other
Description
Converting dew point (of water in air) into vapor pressure or relative humidity and vice versa.
Usage
hr(T, Td, warn = TRUE)
pw(Td, warn = TRUE)
pw.ai(Td, warn = TRUE)
pw.aw(Td, warn = TRUE)
Td(pw = NULL, T = NULL, hr = NULL, warn = TRUE)
Td.aw(pw = NULL, T = NULL, hr = NULL, warn = TRUE)
Tf.ai(pw = NULL, T = NULL, hr = NULL, warn = TRUE)
Arguments
hr |
Relative humidity in |
T |
Temperature of air in |
Td |
Dew point of air in |
pw |
Saturation vapour pressure in |
warn |
When |
Details
All vapour pressures correspond to pure water vapour and are not adjusted to water vapour in air.
Value
hr
transforms dew point above ice / water at a certain temperature into
relative humidity ().
pw
transforms dew point into saturation vapour pressure above ice
() and above water (
) respectively.
pw.ai
transforms dew point into saturation vapour
pressure above ice ().
pw.aw
transforms dew point into saturation vapour
pressure above liquid water ().
Td
transforms vapour pressure or relative humidity and
temperature into frost point above ice () and dew point above water (
) respectively.
Td.aw
transforms vapour pressure or relative humidity and
temperature into dew point above water ().
Tf.ai
transforms vapour pressure or relative humidity and
temperature into frost point above ice ().
Author(s)
Rene Locher
References
Guide to Meteorological Instruments and Methods of Observation, WMO, WMO-No. 8, Seventh edition, 2008, updated 2010, 1.4-29 Annex 4.B
Examples
pw(Td = c(-65, -45, 0, 30, 60))
Td(pw = pw(c(-20, 0, 20)))
hr(T = c(20, 30, 40), Td = c(0, 20, 30))
## [1] 26.20257 55.09561 57.46519
hr(T = seq(0, 60, 5), Td = 0)