terraincoef: Compute terrain influencing factor

In ilyamaclean/microctools: Various worker functions for microclimc package

Compute terrain influencing factor

Description

Function to compute terrain influencing factor

Usage

terraincoef(climatedata, lat, long, pai, slope, aspect, merid = 0, dst = 0)

Arguments

lat	the latitude of the location (decimal degrees)
long	the longitude of the location (decimal degrees)
pai	the total one sided area of canopy elements per unit ground area (see details)
slope	the slope of the underlying ground surface (decimal degrees). Ignored if method = S.
aspect	the aspect of the underlying ground surface (decimal degrees). Ignored if method = S.
merid	an optional numeric value representing the longitude (decimal degrees) of the local time zone meridian (0 for GMT)
dst	an optional numeric value representing the time difference from the timezone meridian (hours, e.g. +1 for BST if merid = 0).
climdata	a dataframe of hourly weather data formated and with units as per the internal dataset climdata

Value

a single numeric value giving a terrain influencing factor

Examples

# Compute influencing factor of an inclined surface
iH<-terraincoef(climatedata,50.2178,-5.32656,1,30,180)
# Compute influencing factor of a flat surface
iRef<-terraincoef(climatedata,50.2178,-5.32656,1,0,0)
# Compute ratio
iR<-iH/iRef
iR

ilyamaclean/microctools documentation built on Jan. 25, 2023, 5:29 a.m.