utils_saturationVP {meteoland} | R Documentation |
Physical utility functions
Description
Set of functions used in the calculation of physical variables.
Usage
utils_saturationVP(temperature)
utils_averageDailyVP(Tmin, Tmax, RHmin, RHmax)
utils_atmosphericPressure(elevation)
utils_airDensity(temperature, Patm)
utils_averageDaylightTemperature(Tmin, Tmax)
utils_latentHeatVaporisation(temperature)
utils_latentHeatVaporisationMol(temperature)
utils_psychrometricConstant(temperature, Patm)
utils_saturationVaporPressureCurveSlope(temperature)
Arguments
temperature |
Air temperature (ºC). |
Tmin , Tmax |
Minimum and maximum daily temperature (ºC). |
RHmin , RHmax |
Minimum and maximum relative humidity (%). |
elevation |
Elevation above sea level (in m). |
Patm |
Atmospheric air pressure (in kPa). |
Value
Values returned for each function are:
utils_airDensity
: air density (in kg·m-3).utils_atmosphericPressure
: Air atmospheric pressure (in kPa).utils_averageDailyVP
: average (actual) vapour pressure (in kPa).utils_averageDaylightTemperature
: average daylight air temperature (in ºC).utils_latentHeatVaporisation
: Latent heat of vaporisation (MJ·kg-1).utils_latentHeatVaporisationMol
: Latent heat of vaporisation (J·mol-1).utils_psychrometricConstant
: Psychrometric constant (kPa·ºC-1).utils_saturationVP
: saturation vapour pressure (in kPa).utils_saturationVaporPressureCurveSlope
: Slope of the saturation vapor pressure curve (kPa·ºC-1).
Functions
-
utils_averageDailyVP()
: Average daily VP -
utils_atmosphericPressure()
: Atmospheric pressure -
utils_airDensity()
: Air density -
utils_averageDaylightTemperature()
: Daylight temperature -
utils_latentHeatVaporisation()
: latent heat vaporisation -
utils_latentHeatVaporisationMol()
: Heat vaporisation mol -
utils_psychrometricConstant()
: psychrometric constant -
utils_saturationVaporPressureCurveSlope()
: Saturation VP curve slope
Author(s)
Miquel De Cáceres Ainsa, CREAF
References
McMurtrie, R. E., D. A. Rook, and F. M. Kelliher. 1990. Modelling the yield of Pinus radiata on a site limited by water and nitrogen. Forest Ecology and Management 30:381–413.
McMahon, T. A., M. C. Peel, L. Lowe, R. Srikanthan, and T. R. McVicar. 2013. Estimating actual, potential, reference crop and pan evaporation using standard meteorological data: a pragmatic synthesis. Hydrology & Earth System Sciences 17:1331–1363. See also: http://www.fao.org/docrep/x0490e/x0490e06.htm