equation of state to be used, either "unesco" or
"gsw" (ignored at present).
Value
In-situ temperature [$^\circ C$] in the ITS-90 scale.
Details
Finds the temperature that yields the given density, with the given
salinity and pressure. The method is a bisection search with temperature
tolerance 0.001 $^\circ C$.
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.