sw.sigma.theta {oce}R Documentation

Seawater potential density anomaly

Description

Compute sigma-theta, the potential density of seawater, minus 1000 kg/m^3.

Usage

sigma.theta <- sw.sigma.theta(ctd)
sigma.theta <- sw.sigma.theta(S, t=NULL, p=NULL)

Arguments

ctd an object of class "ctd".
S salinity [PSU]
t in-situ temperature [degC]
p pressure [dbar]

Details

In the first form, the argument is a ctd object, from which the salinity, temperature and pressure values are extracted and used to for the calculation.

Definition: sigma_theta=rho(S,theta(S,t,p),0) - 1000 kg/m^3.

Value

Potential density anomaly [kg/m^3].

Author(s)

Dan Kelley

References

Fofonoff, P. and R. C. Millard Jr, 1983. Algorithms for computation of fundamental properties of seawater. Unesco Technical Papers in Marine Science, 44, 53 pp

Gill, A.E., 1982. Atmosphere-ocean Dynamics, Academic Press, New York, 662 pp.

See Also

Related density routines include: link{sw.rho}, link{sw.sigma}, and link{sw.sigma.t}.

Examples

 sigma.theta <- sw.sigma.theta(35, 13, 1000) #

[Package oce version 0.1.71 Index]