Properties of Seawater

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Presentation transcript:

Properties of Seawater Density and Pressure

CORRECTION: Residence time the average time a component spends in a system. C = total amount r = the removal rate (units of [C]/time)

Pressure in the Ocean

Pressure in the Ocean Hydrostatic Equation Hydrostatic Balance

TEMPERATURE SALINITY DENSITY

SALINITY

Vertical Structure of Temperature

 Thermohaline Circulation Vertical circulation driven by density  Thermohaline Circulation

DENSITY: controls the movement and stability of the ocean water masses Equator Salinity North South Temperature DENSITY: controls the movement and stability of the ocean water masses

Density: amount of mass per unit volume Units: kg m-3 Linear Equation for “in situ” Density

Histogram of TS in the World Ocean Temperature Salinity

OCEAN WATER MASSES

TS Diagram Temperature Salinity

A different way to express density

Distribution of T and S in the Ocean

Tracking Water Masses on TS diagrams

Tracking Water Masses on TS diagrams

Diabatic exchanges with the atmosphere at the surface T1 S1 T2 S2 Adiabatic changes and Mixing in ocean interior

Worlds ocean Water Masses

Additional things to keep in mind: the equation of density is not linear water is slightly compressible

Density is actually a non-linear function of Temperature, Salinity and Pressure

Taking into account compressibility effects Potential Temperature

Taking into account compressibility effects Potential Density

next time we will talk about MIXING in the OCEAN