lines) consisting of a surface gravity wave interacting with the critical layer. The exact solution
using Miles’ approximation described by (16) and (19) and outlined in section 2c is plotted as
solid lines. The exponential profile is used, and four different values of m are shown,
corresponding to the different colors. … Wave field diagram of the critical layer–gravity wave
interaction in the minimal model of the wind-wave instability. … Approximation to the growth …