oce (version 0.9-3)

swSCTp: Seawater salinity from conductivity ratio, temperature and pressure

Description

Compute salinity, given conductivity ratio, temperature, and pressure.

Usage

swSCTp(conductivity, temperature, pressure, conductivityUnit=c("ratio", "mS/cm", "S/m"))

Arguments

conductivity

conductivity ratio [unitless]

temperature

in-situ temperature [$^\circ$C]

pressure

pressure [dbar]

conductivityUnit

string indicating the unit used for conductivity; ratio means actual conductivity divided by 4.2914 S/m.

Value

• Practical salinity [PSU].

Details

Calculate salinity from what is actually measured by the CTD, i.e. conductivity, the in-situ temperature and pressure. Often this is done by the CTD processing software, but sometimes it is helpful to do this directly, e.g. when there is a concern about mismatches in sensor response times. Salinity is calculated using the UNESCO algorithm described by Fofonoff and Millard (1983).

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

See Also

swConductivity

Examples

print(swSCTp(1,15,2000))   # 34.25045
print(swSCTp(1.2,20,2000)) # 37.24563
print(swSCTp(0.65,5,1500)) # 27.99535