oce (version 0.1-75)

sw.sigma.t: 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 no

t

in-situ temperature [$^\circ$C]

p

pressure [dbar]

Value

• Quasi-potential density anomaly [kg/m$^3$].

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$^3$.

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)