ESS228
Prof. Jin-Yi Yu
q
Momentum Equations
q
Continuity Equation
η
h
Boussinesq Approximation
(for the lower layer)
•
Boussinesq approx: replace the ratio (
r
1
/
r
2
)
by
unity in the momentum equation.
•
We keep the density difference in this
g′ term, because it involves density
difference (
ρ
1
-
ρ
2
)/
ρ
1
*g, which is
related to the buoyancy force.