Concentration

Concentration measures the amount of a constituent per unit amount of a mixture. An advected concentration changes when sources, sinks, diffusion, or entrainment alter the constituent relative to the carrier material.

Table of contents
- Salinity Concentration
- Molar concentration Concentration

Salinity ( $C$ )

Salinity measures dissolved salt content. A transport model must specify its units; salt mass fraction is one convenient convention. A dilute solution's ice liquidus is often approximated by

T_{L} = T_{m} - m C

. Salt-free ice has zero salinity, and the moving interface's salt balance distinguishes salt rejection during freezing from dilution during melting.

Molar concentration ( $c = n / V$ )

Molar concentration is amount of substance of a named chemical species per final chemical solution volume:

c = n / V

. State whether the count describes dissolved species or a conserved analytical concentration.

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