NCAR TOY - February 2008
Method of Multiple Scale -- Embid and Majda style.
To avoid secularity
the second order term must be smaller than the leading order
term.
Embid, P and Majda, A ÒLow Froude number
limiting dynamics for stably stratified flow
with small or finite Rossby number.Ó Geophysical and Astrophysical
Fluid Dynamics, 87 pp 1-50