sw.conductivity {oce} | R Documentation |
Compute seawater conductivity, in W/(m*degC)
con <- sw.conductivity(ctd) con <- sw.conductivity(S, t, p)
ctd |
an object of class "ctd ". |
S |
salinity [PSU] |
t |
in-situ temperature [degC] |
p |
pressure [dbar] |
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.
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.
Dan Kelley
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.
N/A.
library(oce) cond <- sw.conductivity(10,35,100); # 0.618569 diffusivity <- cond / (sw.rho(10,35,100) * sw.specific.heat(10,35,100))