The zonal-vertical cross sections of energy divergence flux and its components in Eq. (6) along 31.2° N at valley 1 time (shaded, kg·m⁻¹·s⁻², (a), (c), (e), (g), and (i)) and peak 1 time (contour, kg·m⁻¹·s⁻², superposed with vertical motion, m·s⁻¹, (b), (d), (f), (h), (j)). (a) and (b) −υ · ∇E; (c) and (d) −υ · ∇p; (e) and (f) −E∇ · υ; (g) and (h) −p∇ · υ; (i) and (j) −∇ · [υ(E + p)]. (k) The three-dimensional divergence (shaded, 10⁻⁴ s⁻¹), temperature perturbation (contour, K), and wind vector (m·s⁻¹). (l) The same as that in panel (j), except at 10 min-later time.