sw.sigma.t {oce}R Documentation

Seawater quasi-potential density anomaly

Description

Compute sigma-t, a quasi-potential density of seawater, minus 1000 kg/m^3.

Usage

sw.sigma.t(S, t=NULL, p=NULL)

Arguments

S either salinity [PSU] (in which case t and p must be provided) or a ctd object (in which case S, t and p are determined from the object, and must not be provided in the argument list).
t in-situ temperature [degC]
p pressure [dbar]

Details

If the first argument is a ctd object, then salinity, temperature and pressure values are extracted from it, and used for the calculation.

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

Value

Quasi-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.theta}.

Examples

sigma.t <- sw.sigma.t(35, 13, 1000)

[Package oce version 0.1-76 Index]