Parameter: sigma-theta

Short Description: 
sigma-theta
Short Name: 
sigma_0
Official Name: 
sigma_0
Units: 
kilograms/meter^3-1000
Graphable: 
Yes
No Data Value: 
nd
External Identifier:
» skos:closeMatch http://vocab.nerc.ac.uk/collection/P01/current/SIGTPR01/
Description

sigma-theta (potential density) in kg/m^3. Sigma-theta is denoted 'sigma_0', where the last digit, a zero, is used to represent the Greek letter theta. This altered density which takes into account adiabatic heating/cooling with changes in pressure is called the 'potential density'. (See How do we measure the density of sea water?)