ESS227
Prof. Jin-Yi Yu
Meaning of
the Scaled Continuity Eq.
scaled
• Velocity
divergence vanishes
( ) in
an incompressible
fluid.
• For purely horizontal flow, the atmosphere behaves as though it were an incompressible fluid.
• However, when there is vertical motion the compressibility associated with the height dependence of ρ0 must be taken into account.