atm_pressure: Compute atmospheric pressure at site

In VincentGodard/TCNtools: Terrestrial Cosmogenic Nuclides Calculations

Compute atmospheric pressure at site

Description

Compute atmospheric pressure at site

Usage

atm_pressure(alt, lon = NULL, lat = NULL, model = "stone2000")

Arguments

alt	Altitude (m)
lon	Longitude (degrees) optional (only for "era40" model)
lat	Latitude (degrees) optional (only for "era40" model)
model	Model used for computation, one of "stone2000" or "era40"

Details

Choice of models :

(1) "stone2000" (default) : equation 1 of Stone (2000) JGR paper (only function of site altitude) Stone (2000) https://doi.org/10.1029/2000JB900181

(2) "era40" : Looks up mean sea level pressure and mean 1000 mb temp from ERA-40 reanalysis and calculates site atmospheric pressures using these as inputs to the standard atmosphere equation (function of site latitude, longitude and altitude). Uppala et al (2005) https://doi.org/10.1256/qj.04.176

Value

Atmospheric pressure in hPa

Examples

z = seq(0,5000,by=100)
P1=atm_pressure(alt=z,model="stone2000")
P2=atm_pressure(alt=z,lat=-60,lon=0,model="era40")
plot(P1,z,type="l",xlab="Pressure (hPa)",ylab="Altitude (m)")
lines(P2,z,lty=2)

VincentGodard/TCNtools documentation built on Jan. 29, 2023, 9:23 a.m.