'Isobaric surface dashed line' diaporamas de présentation

Geopotential

Geopotential. Geopotential ? is defined as the amount of work done to move a parcel of unit mass through a vertical distance dz against gravity. The geopotential difference between levels z 1 and z 2 (with pressure p 1 and p 2 ) is. (unit of ? : Joules/kg=m 2 /s 2 ). Dynamic height.

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Re-scaling the vertical momentum equation

Re-scaling the vertical momentum equation. Since the density and pressure perturbation is not negligible in the vertical momentum equation, i.e.,. , and. ,. The vertical pressure gradient force becomes. Taking into the vertical momentum equation, we have. ,. and assume. If we scale. then.

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Geopotential and isobaric surfaces

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