airRho {oce} | R Documentation |
Air Density
Description
Compute \rho
, the in-situ density of dry air.
Usage
airRho(temperature, pressure, humidity)
Arguments
temperature |
in-situ temperature, in |
pressure |
numeric value for pressure in Pa (not the kPa used in public weather forecasts). |
humidity |
ignored at present |
Details
This will eventually be a proper equation of state, but for now it just uses a dry-air formula posted on wikipedia (i.e. not trustworthy).
Value
In-situ dry-air density, in kg/m^3
.
Author(s)
Dan Kelley
References
-
https://en.wikipedia.org/wiki/Density_of_air
National Oceanographic and Atmospheric Agency, 1976. U.S. Standard Atmosphere, 1976. NOAA-S/T 76-1562. (A PDF of this document may be available at
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19770009539_1977009539.pdf
orhttp://www.dtic.mil/cgi-bin/GetTRDoc?Location=U2&doc=GetTRDoc.pdf&AD=ADA035728
although neither link has proven to be reliable.)
Examples
degC <- seq(0, 30, length.out = 100)
p <- seq(98, 102, length.out = 100) * 1e3
contour(x = degC, y = p, z = outer(degC, p, airRho), labcex = 1)