swSigmaTheta(salinity, temperature = NULL, pressure = NULL, referencePressure = 0, 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].oce object, then salinity, etc., are
extracted from it, and used for the calculation instead of any values
provided in the other arguments.
swRho documentation.
T68fromT90,
T90fromT48, T90fromT68,
swAbsoluteSalinity,
swAlphaOverBeta, swAlpha,
swBeta, swCSTp,
swConservativeTemperature,
swDepth, swDynamicHeight,
swLapseRate, swN2,
swPressure, swRho,
swRrho, swSCTp,
swSTrho, swSigma0,
swSigma1, swSigma2,
swSigma3, swSigma4,
swSigmaT, swSigma,
swSoundAbsorption,
swSoundSpeed, swSpecificHeat,
swSpice, swTFreeze,
swTSrho,
swThermalConductivity,
swTheta, swViscosity,
swZ
swSigmaTheta(35, 13, 1000) # 26.42514 (gsw)
swSigmaTheta(35, 13, 1000, eos="unesco") # 26.4219
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