Calculating seawater density
Seawater density (ρ in kg m-3) can be calculated as follows:
where the density of water at sea level is:
10‑62
10‑63
10‑64
The costant 
used in equation 10‑61 also depends on salinity, temperature, and pressure
10‑65
where
10‑66
10‑67
and
10‑68
10‑69
10‑70
10‑71
In the above equations, T is temperature in C, P is pressure in kPa, and S is salinity in mg g-1 or ‰. These equations are valid for a range of salinity between 0 and 42 ‰, temperatures between 2 and 40 °C, and pressures up to 100,000 kPa.
