sw.sigma.theta {oce} | R Documentation |
Compute sigma-theta, the potential density of seawater, minus 1000 kg/m^3.
sw.sigma.theta(S, t=NULL, p=NULL)
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] |
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_theta=rho(S,theta(S,t,p),0) - 1000 kg/m^3.
Potential density anomaly [kg/m^3].
Dan Kelley
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.
Related density routines include: link{sw.rho}
,
link{sw.sigma}
, and
link{sw.sigma.t}
.
sigma.theta <- sw.sigma.theta(35, 13, 1000) #