The extent at which these phenomena terminate may be predicted by applying Hide’s theorem to a two-level model of them named for Held and Hou. The energy used to drive these phenomena is derived from structures predicted by Joanne Simpson and Herbert Riehl named “hot towers.” (-5[1])These phenomena are often cited as an example of a subsidence inversion, which commonly occurs in their descending branch, leading to adiabatic warming. The strength of these prototypical “thermally direct” phenomena varies alongside a related feature named for Walker in the El Niño–Southern (-5[1])Oscillation. The convergence of these phenomena results in the Intertropical Convergence Zone, and they drive (10[1])the flow of the trade winds. For 10 points, name this atmospheric circulation located along the equator, below the higher latitude polar and Ferrel cells. ■END■ (10[1]0[1])