Salinity calculations from in situ measurements

An approximation to the salinity-conductivity relationship suitable for use on a small programmable electronic calculator is presented. The equations represent numerical fits to the experimental data of Brown and Allentoft with pressure corrections after Bradshaw and Schleicher. For temperatures from freezing to +20°C, salinities from 4 to 40‰, and pressures to 1700 db the error with respect to the data fitted is less than ±0.01‰. Though intended for use with in situ salinometers in the Arctic, the equations may prove useful for others working in cool estuarial waters.