swSoundSpeed(salinity, temperature = NULL, pressure = NULL, longitude = 300, latitude = 30, eos = getOption("oceEOS", default = "gsw"))temperature
and pressure must be provided) or an oce object, in
which case salinity, temperature (in the ITS-90 scale; see
next item), etc. are inferred from the object.eos="gsw"), and is the value contained within
ctd objects (and probably most other objects created with data
acquired in the past decade or two). Since the UNESCO-style calculation is
based on IPTS-68, the temperature is converted within the present function,
using T68fromT90.eos="gsw";
see ‘Details’).eos="gsw"; see
‘Details’)."unesco" [1,2] or "gsw"
[3,4].eos="unesco", the sound speed is calculated using the formulation
in section 9 of Fofonoff and Millard (1983). If eos="gsw", then the
gsw_sound_speed function from the
gsw package is used.
T68fromT90,
T90fromT48, T90fromT68,
swAbsoluteSalinity,
swAlphaOverBeta, swAlpha,
swBeta, swCSTp,
swConservativeTemperature,
swDepth, swDynamicHeight,
swLapseRate, swN2,
swPressure, swRho,
swRrho, swSCTp,
swSTrho, swSigma0,
swSigma1, swSigma2,
swSigma3, swSigma4,
swSigmaTheta, swSigmaT,
swSigma, swSoundAbsorption,
swSpecificHeat, swSpice,
swTFreeze, swTSrho,
swThermalConductivity,
swTheta, swViscosity,
swZ
swSoundSpeed(40, T90fromT68(40), 10000) # 1731.995 (p48 of Fofonoff + Millard 1983)
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