Compute $\sigma$, the in-situ density of seawater, minus 1000 kg/m$^3$.
Usage
sig <- sw.sigma(S, t, p);
Arguments
S
in-situ salinity [PSU]
t
in-situ temperature [$^\circ$C]
p
in-situ pressure [dbar]
Value
In-situ density anomaly [kg/m$^3$].
Details
Definition:
$\rho(S,t,p)$
- 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: sw.rho
to calculate in-situ density,
sw.sigma.t to calculate an archaic quantity found in old
textbooks, and
sw.sigma.theta to calculate potential density anomaly
relative to the surface pressure. If you are thinking of using
sw.sigma, you probably want sw.sigma.theta.