sw.conductivity {oce}R Documentation

Seawater conductivity

Description

Compute seawater conductivity, in W/(m*degC)

Usage

con <- sw.conductivity(ctd)
con <- sw.conductivity(S, t, p)

Arguments

ctd an object of class "ctd".
S salinity [PSU]
t in-situ temperature [degC]
p pressure [dbar]

Details

In the first form, the argument is a ctd object, from which the salinity, temperature and pressure values are extracted and used to for the calculation.

Provisional code only!

To do: Fill in a summary of Caldwell's technique.

To do: Compare this with Caldwell's stated uncertainty.

Caution. The results differ from Fofonoff's (1962) table 5 by 0.1 percent at 35PSU, and by under 1 percent for fresh water.

Value

Conductivity of seawater in W/(m*degC). To calculate thermal diffusivity in m^2/s, divide by the product of density and specific heat, as in the example.

Author(s)

Dan Kelley

References

Caldwell, Douglas R., 1974. Thermal conductivity of seawater, Deep-sea Research, 21, 131-137.

Fofonoff, N. P., 1962. Physical properties of sea-water, The Sea, 1, 3-30.

See Also

N/A.

Examples

 library(oce)
 cond <- sw.conductivity(10,35,100); # 0.618569
 diffusivity <- cond / (sw.rho(10,35,100) * sw.specific.heat(10,35,100))

[Package oce version 0.1.71 Index]