Article · Wikipedia archive · Last revised Jul 23, 2026

Sigma-t

Sigma-t is a quantity used in oceanography to measure the density of seawater at a given temperature. σT is defined as ρ(S,T)-1000 kg m−3, where ρ(S,T) is the density of a sample of seawater at temperature T and salinity S, measured in kg m−3, at standard atmospheric pressure. For example, a water sample with a density of 1.027 g/cm3 has a σT value of 27.

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Sigma-t is a quantity used in oceanography to measure the density of seawater at a given temperature.1 σT is defined as ρ(S,T)-1000 kg m−3, where ρ(S,T) is the density of a sample of seawater at temperature T and salinity S, measured in kg m−3, at standard atmospheric pressure. For example, a water sample with a density of 1.027 g/cm3 has a σT value of 27.

References

References

  1. "Parameter: SigmaT | CTD Profiles | Biological and Chemical Oceanography Data Management Office". www.bco-dmo.org. Retrieved 2022-10-13.
See also

See also