… The labels N, D, AM, and PM denote the equilibrium wind vectors during nighttime, daytime,
the daytime morning hours, and the daytime afternoon hours, respectively. The dashed lines
represent the radii of the circular arcs. … Amplitude of inertial oscillation as a function of the
geostrophic and initial wind components at 30 and 50S. The black circles represent the average
amplitudes on the third and fourth days, and the black dashed lines are the interpolations for
these black circles. The red and blue circles represent amplitudes for the third and fourth …